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One file, zero global state.",[604,605,608,611,636],"prompt",{":actions":606,"description":607,"icon":248},"[\"copy\",\"cursor\",\"claude\"]","Set up evlog in my Next.js app",[587,609,610],{},"Set up evlog in my Next.js app with wide events and structured errors.",[612,613,614,618,621,624,627,630,633],"ul",{},[615,616,617],"li",{},"Install evlog: pnpm add evlog",[615,619,620],{},"Create lib\u002Fevlog.ts with createEvlog() to export withEvlog, useLogger, createError",[615,622,623],{},"Set service name and optional sampling\u002Fdrain config",[615,625,626],{},"Wrap API route handlers with withEvlog()",[615,628,629],{},"Use useLogger() inside handlers to build wide events with log.set()",[615,631,632],{},"Throw errors with createError({ message, status, why, fix })",[615,634,635],{},"Wide events are auto-emitted when each request completes",[587,637,638,639,645,646],{},"Docs: ",[640,641,642],"a",{"href":642,"rel":643},"https:\u002F\u002Fwww.evlog.dev\u002Fintegrate\u002Fframeworks\u002Fnextjs",[644],"nofollow","\nAdapters: ",[640,647,648],{"href":648,"rel":649},"https:\u002F\u002Fwww.evlog.dev\u002Fintegrate\u002Fadapters\u002Foverview",[644],[651,652,25],"h2",{"id":653},"quick-start",[655,656,658],"h3",{"id":657},"_1-install","1. Install",[660,661,662,687,701,715],"code-group",{},[663,664,670],"pre",{"className":665,"code":666,"filename":667,"language":668,"meta":669,"style":669},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[591,671,672],{"__ignoreMap":669},[673,674,677,680,684],"span",{"class":675,"line":676},"line",1,[673,678,667],{"class":679},"sBMFI",[673,681,683],{"class":682},"sfazB"," add",[673,685,686],{"class":682}," evlog\n",[663,688,691],{"className":665,"code":689,"filename":690,"language":668,"meta":669,"style":669},"bun add evlog\n","bun",[591,692,693],{"__ignoreMap":669},[673,694,695,697,699],{"class":675,"line":676},[673,696,690],{"class":679},[673,698,683],{"class":682},[673,700,686],{"class":682},[663,702,705],{"className":665,"code":703,"filename":704,"language":668,"meta":669,"style":669},"yarn add evlog\n","yarn",[591,706,707],{"__ignoreMap":669},[673,708,709,711,713],{"class":675,"line":676},[673,710,704],{"class":679},[673,712,683],{"class":682},[673,714,686],{"class":682},[663,716,719],{"className":665,"code":717,"filename":718,"language":668,"meta":669,"style":669},"npm install evlog\n","npm",[591,720,721],{"__ignoreMap":669},[673,722,723,725,728],{"class":675,"line":676},[673,724,718],{"class":679},[673,726,727],{"class":682}," install",[673,729,686],{"class":682},[655,731,733],{"id":732},"_2-create-your-evlog-instance","2. Create your evlog instance",[663,735,740],{"className":736,"code":737,"filename":738,"language":739,"meta":669,"style":669},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createEvlog } from 'evlog\u002Fnext'\n\nexport const { withEvlog, useLogger, log, createError } = createEvlog({\n service: 'my-app',\n})\n","lib\u002Fevlog.ts","typescript",[591,741,742,771,778,824,845],{"__ignoreMap":669},[673,743,744,748,752,756,759,762,765,768],{"class":675,"line":676},[673,745,747],{"class":746},"s7zQu","import",[673,749,751],{"class":750},"sMK4o"," {",[673,753,755],{"class":754},"sTEyZ"," createEvlog",[673,757,758],{"class":750}," }",[673,760,761],{"class":746}," from",[673,763,764],{"class":750}," '",[673,766,767],{"class":682},"evlog\u002Fnext",[673,769,770],{"class":750},"'\n",[673,772,774],{"class":675,"line":773},2,[673,775,777],{"emptyLinePlaceholder":776},true,"\n",[673,779,781,784,788,790,793,796,799,801,804,806,809,812,815,818,821],{"class":675,"line":780},3,[673,782,783],{"class":746},"export",[673,785,787],{"class":786},"spNyl"," const",[673,789,751],{"class":750},[673,791,792],{"class":754}," withEvlog",[673,794,795],{"class":750},",",[673,797,798],{"class":754}," useLogger",[673,800,795],{"class":750},[673,802,803],{"class":754}," log",[673,805,795],{"class":750},[673,807,808],{"class":754}," createError ",[673,810,811],{"class":750},"}",[673,813,814],{"class":750}," =",[673,816,755],{"class":817},"s2Zo4",[673,819,820],{"class":754},"(",[673,822,823],{"class":750},"{\n",[673,825,827,831,834,836,839,842],{"class":675,"line":826},4,[673,828,830],{"class":829},"swJcz"," service",[673,832,833],{"class":750},":",[673,835,764],{"class":750},[673,837,838],{"class":682},"my-app",[673,840,841],{"class":750},"'",[673,843,844],{"class":750},",\n",[673,846,848,850],{"class":675,"line":847},5,[673,849,811],{"class":750},[673,851,852],{"class":754},")\n",[655,854,856],{"id":855},"_3-wrap-a-route-handler","3. Wrap a route handler",[663,858,861],{"className":736,"code":859,"filename":860,"language":739,"meta":669,"style":669},"import { withEvlog, useLogger } from '@\u002Flib\u002Fevlog'\n\nexport const GET = withEvlog(async () => {\n const log = useLogger()\n log.set({ action: 'hello' })\n return Response.json({ message: 'Hello!' })\n})\n","app\u002Fapi\u002Fhello\u002Froute.ts",[591,862,863,886,890,918,932,964,998],{"__ignoreMap":669},[673,864,865,867,869,871,873,875,877,879,881,884],{"class":675,"line":676},[673,866,747],{"class":746},[673,868,751],{"class":750},[673,870,792],{"class":754},[673,872,795],{"class":750},[673,874,798],{"class":754},[673,876,758],{"class":750},[673,878,761],{"class":746},[673,880,764],{"class":750},[673,882,883],{"class":682},"@\u002Flib\u002Fevlog",[673,885,770],{"class":750},[673,887,888],{"class":675,"line":773},[673,889,777],{"emptyLinePlaceholder":776},[673,891,892,894,896,899,902,904,906,909,912,915],{"class":675,"line":780},[673,893,783],{"class":746},[673,895,787],{"class":786},[673,897,898],{"class":754}," GET ",[673,900,901],{"class":750},"=",[673,903,792],{"class":817},[673,905,820],{"class":754},[673,907,908],{"class":786},"async",[673,910,911],{"class":750}," ()",[673,913,914],{"class":786}," =>",[673,916,917],{"class":750}," {\n",[673,919,920,923,925,927,929],{"class":675,"line":826},[673,921,922],{"class":786}," const",[673,924,803],{"class":754},[673,926,814],{"class":750},[673,928,798],{"class":817},[673,930,931],{"class":829},"()\n",[673,933,934,937,940,943,945,948,951,953,955,958,960,962],{"class":675,"line":847},[673,935,936],{"class":754}," log",[673,938,939],{"class":750},".",[673,941,942],{"class":817},"set",[673,944,820],{"class":829},[673,946,947],{"class":750},"{",[673,949,950],{"class":829}," action",[673,952,833],{"class":750},[673,954,764],{"class":750},[673,956,957],{"class":682},"hello",[673,959,841],{"class":750},[673,961,758],{"class":750},[673,963,852],{"class":829},[673,965,967,970,973,975,978,980,982,985,987,989,992,994,996],{"class":675,"line":966},6,[673,968,969],{"class":746}," return",[673,971,972],{"class":754}," Response",[673,974,939],{"class":750},[673,976,977],{"class":817},"json",[673,979,820],{"class":829},[673,981,947],{"class":750},[673,983,984],{"class":829}," message",[673,986,833],{"class":750},[673,988,764],{"class":750},[673,990,991],{"class":682},"Hello!",[673,993,841],{"class":750},[673,995,758],{"class":750},[673,997,852],{"class":829},[673,999,1001,1003],{"class":675,"line":1000},7,[673,1002,811],{"class":750},[673,1004,852],{"class":754},[651,1006,1008],{"id":1007},"instrumentation","Instrumentation",[587,1010,1011,1012,1019,1020,1023],{},"Next.js supports an ",[640,1013,1016],{"href":1014,"rel":1015},"https:\u002F\u002Fnextjs.org\u002Fdocs\u002Fapp\u002Fguides\u002Finstrumentation",[644],[591,1017,1018],{},"instrumentation.ts"," file at the project root for server startup hooks and error reporting. evlog provides ",[591,1021,1022],{},"createInstrumentation()"," to integrate with this pattern.",[1025,1026,1028,1031],"callout",{"color":1027,"icon":13},"info",[587,1029,1030],{},"These two APIs serve different purposes and can be used independently or together:",[612,1032,1033,1043,1058],{},[615,1034,1035,1040,1041],{},[1036,1037,1038],"strong",{},[591,1039,593],{},": per-request wide events via ",[591,1042,597],{},[615,1044,1045,1049,1050,1053,1054,1057],{},[1036,1046,1047],{},[591,1048,1022],{},": server startup (",[591,1051,1052],{},"register()",") + unhandled error reporting (",[591,1055,1056],{},"onRequestError()",") across all routes, including SSR and RSC",[615,1059,1060,1061,1063,1064,1066,1067,939],{},"Both can coexist: ",[591,1062,1052],{}," initializes and locks the logger first, so ",[591,1065,593],{}," respects it. Each can have its own ",[591,1068,1069],{},"drain",[655,1071,1073],{"id":1072},"_1-split-instrumentation-from-route-config","1. Split instrumentation from route config",[587,1075,1076,1077,1080,1081,1083,1084,1087,1088,1091,1092,1095],{},"Keep Node-only imports (",[591,1078,1079],{},"evlog\u002Ffs",", heavy adapters) out of root ",[591,1082,1018],{},". Use ",[591,1085,1086],{},"defineNodeInstrumentation"," with an options object. evlog loads ",[591,1089,1090],{},"createInstrumentation"," on Node.js only, without a visible ",[591,1093,1094],{},"import()"," in your file.",[612,1097,1098,1107],{},[615,1099,1100,1101,1103,1104],{},"Root ",[591,1102,1018],{}," → ",[591,1105,1106],{},"defineNodeInstrumentation({ service, ... })",[615,1108,1109,1103,1111,1113],{},[591,1110,738],{},[591,1112,593],{}," and Node-only drains for API routes",[663,1115,1117],{"className":736,"code":1116,"filename":1018,"language":739,"meta":669,"style":669},"import { defineNodeInstrumentation } from 'evlog\u002Fnext\u002Finstrumentation'\n\nexport const { register, onRequestError } = defineNodeInstrumentation({\n service: 'my-app',\n captureOutput: true,\n})\n",[591,1118,1119,1139,1143,1169,1183,1196],{"__ignoreMap":669},[673,1120,1121,1123,1125,1128,1130,1132,1134,1137],{"class":675,"line":676},[673,1122,747],{"class":746},[673,1124,751],{"class":750},[673,1126,1127],{"class":754}," defineNodeInstrumentation",[673,1129,758],{"class":750},[673,1131,761],{"class":746},[673,1133,764],{"class":750},[673,1135,1136],{"class":682},"evlog\u002Fnext\u002Finstrumentation",[673,1138,770],{"class":750},[673,1140,1141],{"class":675,"line":773},[673,1142,777],{"emptyLinePlaceholder":776},[673,1144,1145,1147,1149,1151,1154,1156,1159,1161,1163,1165,1167],{"class":675,"line":780},[673,1146,783],{"class":746},[673,1148,787],{"class":786},[673,1150,751],{"class":750},[673,1152,1153],{"class":754}," register",[673,1155,795],{"class":750},[673,1157,1158],{"class":754}," onRequestError ",[673,1160,811],{"class":750},[673,1162,814],{"class":750},[673,1164,1127],{"class":817},[673,1166,820],{"class":754},[673,1168,823],{"class":750},[673,1170,1171,1173,1175,1177,1179,1181],{"class":675,"line":826},[673,1172,830],{"class":829},[673,1174,833],{"class":750},[673,1176,764],{"class":750},[673,1178,838],{"class":682},[673,1180,841],{"class":750},[673,1182,844],{"class":750},[673,1184,1185,1188,1190,1194],{"class":675,"line":847},[673,1186,1187],{"class":829}," captureOutput",[673,1189,833],{"class":750},[673,1191,1193],{"class":1192},"sfNiH"," true",[673,1195,844],{"class":750},[673,1197,1198,1200],{"class":675,"line":966},[673,1199,811],{"class":750},[673,1201,852],{"class":754},[663,1203,1205],{"className":736,"code":1204,"filename":738,"language":739,"meta":669,"style":669},"import { createEvlog } from 'evlog\u002Fnext'\nimport { createFsDrain } from 'evlog\u002Ffs'\n\nexport const { withEvlog, useLogger, log, createError } = createEvlog({\n service: 'my-app',\n drain: createFsDrain(),\n})\n",[591,1206,1207,1225,1244,1248,1280,1294,1308],{"__ignoreMap":669},[673,1208,1209,1211,1213,1215,1217,1219,1221,1223],{"class":675,"line":676},[673,1210,747],{"class":746},[673,1212,751],{"class":750},[673,1214,755],{"class":754},[673,1216,758],{"class":750},[673,1218,761],{"class":746},[673,1220,764],{"class":750},[673,1222,767],{"class":682},[673,1224,770],{"class":750},[673,1226,1227,1229,1231,1234,1236,1238,1240,1242],{"class":675,"line":773},[673,1228,747],{"class":746},[673,1230,751],{"class":750},[673,1232,1233],{"class":754}," createFsDrain",[673,1235,758],{"class":750},[673,1237,761],{"class":746},[673,1239,764],{"class":750},[673,1241,1079],{"class":682},[673,1243,770],{"class":750},[673,1245,1246],{"class":675,"line":780},[673,1247,777],{"emptyLinePlaceholder":776},[673,1249,1250,1252,1254,1256,1258,1260,1262,1264,1266,1268,1270,1272,1274,1276,1278],{"class":675,"line":826},[673,1251,783],{"class":746},[673,1253,787],{"class":786},[673,1255,751],{"class":750},[673,1257,792],{"class":754},[673,1259,795],{"class":750},[673,1261,798],{"class":754},[673,1263,795],{"class":750},[673,1265,803],{"class":754},[673,1267,795],{"class":750},[673,1269,808],{"class":754},[673,1271,811],{"class":750},[673,1273,814],{"class":750},[673,1275,755],{"class":817},[673,1277,820],{"class":754},[673,1279,823],{"class":750},[673,1281,1282,1284,1286,1288,1290,1292],{"class":675,"line":847},[673,1283,830],{"class":829},[673,1285,833],{"class":750},[673,1287,764],{"class":750},[673,1289,838],{"class":682},[673,1291,841],{"class":750},[673,1293,844],{"class":750},[673,1295,1296,1299,1301,1303,1306],{"class":675,"line":966},[673,1297,1298],{"class":829}," drain",[673,1300,833],{"class":750},[673,1302,1233],{"class":817},[673,1304,1305],{"class":754},"()",[673,1307,844],{"class":750},[673,1309,1310,1312],{"class":675,"line":1000},[673,1311,811],{"class":750},[673,1313,852],{"class":754},[655,1315,1317],{"id":1316},"_2-wire-up-instrumentationts","2. Wire up instrumentation.ts",[587,1319,1320,1321,1323,1324,1326,1327,1330],{},"Next.js evaluates ",[591,1322,1018],{}," in both Node.js and Edge runtimes. ",[591,1325,1086],{}," gates on ",[591,1328,1329],{},"NEXT_RUNTIME === 'nodejs'"," and loads the Node-only factory internally.",[655,1332,1334],{"id":1333},"custom-behavior-evlog-your-code","Custom behavior (evlog + your code)",[587,1336,1337,1338,1341],{},"Pass a ",[1036,1339,1340],{},"loader callback"," when you need extra startup work alongside evlog:",[663,1343,1345],{"className":736,"code":1344,"filename":1018,"language":739,"meta":669,"style":669},"import { defineNodeInstrumentation } from 'evlog\u002Fnext\u002Finstrumentation'\n\nexport const { register, onRequestError } = defineNodeInstrumentation(async () => {\n const { createInstrumentation } = await import('evlog\u002Fnext\u002Finstrumentation\u002Fcreate')\n const { register: evlogRegister, onRequestError: evlogOnRequestError } = createInstrumentation({\n service: 'my-app',\n captureOutput: true,\n })\n\n return {\n async register() {\n await evlogRegister()\n \u002F\u002F e.g. OpenTelemetry, feature flags, custom one-off init\n },\n onRequestError: evlogOnRequestError,\n }\n})\n",[591,1346,1347,1365,1369,1399,1429,1462,1477,1488,1496,1501,1508,1520,1530,1537,1543,1555,1561],{"__ignoreMap":669},[673,1348,1349,1351,1353,1355,1357,1359,1361,1363],{"class":675,"line":676},[673,1350,747],{"class":746},[673,1352,751],{"class":750},[673,1354,1127],{"class":754},[673,1356,758],{"class":750},[673,1358,761],{"class":746},[673,1360,764],{"class":750},[673,1362,1136],{"class":682},[673,1364,770],{"class":750},[673,1366,1367],{"class":675,"line":773},[673,1368,777],{"emptyLinePlaceholder":776},[673,1370,1371,1373,1375,1377,1379,1381,1383,1385,1387,1389,1391,1393,1395,1397],{"class":675,"line":780},[673,1372,783],{"class":746},[673,1374,787],{"class":786},[673,1376,751],{"class":750},[673,1378,1153],{"class":754},[673,1380,795],{"class":750},[673,1382,1158],{"class":754},[673,1384,811],{"class":750},[673,1386,814],{"class":750},[673,1388,1127],{"class":817},[673,1390,820],{"class":754},[673,1392,908],{"class":786},[673,1394,911],{"class":750},[673,1396,914],{"class":786},[673,1398,917],{"class":750},[673,1400,1401,1403,1405,1408,1410,1412,1415,1418,1420,1422,1425,1427],{"class":675,"line":826},[673,1402,922],{"class":786},[673,1404,751],{"class":750},[673,1406,1407],{"class":754}," createInstrumentation",[673,1409,758],{"class":750},[673,1411,814],{"class":750},[673,1413,1414],{"class":746}," await",[673,1416,1417],{"class":750}," import",[673,1419,820],{"class":829},[673,1421,841],{"class":750},[673,1423,1424],{"class":682},"evlog\u002Fnext\u002Finstrumentation\u002Fcreate",[673,1426,841],{"class":750},[673,1428,852],{"class":829},[673,1430,1431,1433,1435,1437,1439,1442,1444,1447,1449,1452,1454,1456,1458,1460],{"class":675,"line":847},[673,1432,922],{"class":786},[673,1434,751],{"class":750},[673,1436,1153],{"class":829},[673,1438,833],{"class":750},[673,1440,1441],{"class":754}," evlogRegister",[673,1443,795],{"class":750},[673,1445,1446],{"class":829}," onRequestError",[673,1448,833],{"class":750},[673,1450,1451],{"class":754}," evlogOnRequestError",[673,1453,758],{"class":750},[673,1455,814],{"class":750},[673,1457,1407],{"class":817},[673,1459,820],{"class":829},[673,1461,823],{"class":750},[673,1463,1464,1467,1469,1471,1473,1475],{"class":675,"line":966},[673,1465,1466],{"class":829}," service",[673,1468,833],{"class":750},[673,1470,764],{"class":750},[673,1472,838],{"class":682},[673,1474,841],{"class":750},[673,1476,844],{"class":750},[673,1478,1479,1482,1484,1486],{"class":675,"line":1000},[673,1480,1481],{"class":829}," captureOutput",[673,1483,833],{"class":750},[673,1485,1193],{"class":1192},[673,1487,844],{"class":750},[673,1489,1491,1494],{"class":675,"line":1490},8,[673,1492,1493],{"class":750}," }",[673,1495,852],{"class":829},[673,1497,1499],{"class":675,"line":1498},9,[673,1500,777],{"emptyLinePlaceholder":776},[673,1502,1504,1506],{"class":675,"line":1503},10,[673,1505,969],{"class":746},[673,1507,917],{"class":750},[673,1509,1511,1514,1516,1518],{"class":675,"line":1510},11,[673,1512,1513],{"class":786}," async",[673,1515,1153],{"class":829},[673,1517,1305],{"class":750},[673,1519,917],{"class":750},[673,1521,1523,1526,1528],{"class":675,"line":1522},12,[673,1524,1525],{"class":746}," await",[673,1527,1441],{"class":817},[673,1529,931],{"class":829},[673,1531,1533],{"class":675,"line":1532},13,[673,1534,1536],{"class":1535},"sHwdD"," \u002F\u002F e.g. OpenTelemetry, feature flags, custom one-off init\n",[673,1538,1540],{"class":675,"line":1539},14,[673,1541,1542],{"class":750}," },\n",[673,1544,1546,1549,1551,1553],{"class":675,"line":1545},15,[673,1547,1548],{"class":829}," onRequestError",[673,1550,833],{"class":750},[673,1552,1451],{"class":754},[673,1554,844],{"class":750},[673,1556,1558],{"class":675,"line":1557},16,[673,1559,1560],{"class":750}," }\n",[673,1562,1564,1566],{"class":675,"line":1563},17,[673,1565,811],{"class":750},[673,1567,852],{"class":754},[587,1569,1570,1571,1573,1574,1576,1577,939],{},"Keep ",[591,1572,738],{}," for ",[591,1575,593],{}," and Node-only drains. Route handlers import ",[591,1578,883],{},[587,1580,1581],{},"Next.js automatically calls these exports:",[612,1583,1584,1601],{},[615,1585,1586,1588,1589,1592,1593,1596,1597,1600],{},[591,1587,1052],{},": Runs once when the server starts. Initializes the evlog logger with your configured drain, sampling, and options. When ",[591,1590,1591],{},"captureOutput"," is enabled, ",[591,1594,1595],{},"stdout"," and ",[591,1598,1599],{},"stderr"," writes are captured as structured log events.",[615,1602,1603,1605,1606,1609,1610,1609,1613,1609,1616,1619],{},[591,1604,1056],{},": Called on every unhandled request error. Emits a structured error log with the error message, digest, stack trace, request path\u002Fmethod, and routing context (",[591,1607,1608],{},"routerKind",", ",[591,1611,1612],{},"routePath",[591,1614,1615],{},"routeType",[591,1617,1618],{},"renderSource",").",[1025,1621,1622,1624,1625,1627,1628,1596,1631,1634,1635,1638,1639,1642,1643,1646,1647,1650,1651,1654],{"color":1027,"icon":13},[591,1623,1591],{}," only activates in the Node.js runtime (",[591,1626,1329],{},"). It patches ",[591,1629,1630],{},"process.stdout.write",[591,1632,1633],{},"process.stderr.write"," to emit structured ",[591,1636,1637],{},"log.info"," \u002F ",[591,1640,1641],{},"log.error"," events. When ",[591,1644,1645],{},"silent"," is ",[591,1648,1649],{},"false"," (the default), captured output is shown once as structured terminal output, and the raw write is not duplicated. Set ",[591,1652,1653],{},"silent: true"," to keep the original passthrough alongside drain delivery. Known Next.js Edge bundler warnings are filtered by default so they are not re-emitted as evlog errors.",[655,1656,526],{"id":1657},"configuration",[587,1659,1660,1596,1663,1665,1666,1609,1669,1609,1672,1609,1675,1609,1678,1609,1680,1609,1683,1609,1686,1688],{},[591,1661,1662],{},"defineNodeInstrumentation()",[591,1664,1022],{}," accept global logger options (",[591,1667,1668],{},"enabled",[591,1670,1671],{},"service",[591,1673,1674],{},"env",[591,1676,1677],{},"pretty",[591,1679,1645],{},[591,1681,1682],{},"sampling",[591,1684,1685],{},"stringify",[591,1687,1069],{},") plus:",[1690,1691,1692,1711],"table",{},[1693,1694,1695],"thead",{},[1696,1697,1698,1702,1705,1708],"tr",{},[1699,1700,1701],"th",{},"Option",[1699,1703,1704],{},"Type",[1699,1706,1707],{},"Default",[1699,1709,1710],{},"Description",[1712,1713,1714],"tbody",{},[1696,1715,1716,1721,1726,1730],{},[1717,1718,1719],"td",{},[591,1720,1591],{},[1717,1722,1723],{},[591,1724,1725],{},"boolean | CaptureOutputOptions",[1717,1727,1728],{},[591,1729,1649],{},[1717,1731,1732],{},"Capture stdout\u002Fstderr as structured log events",[587,1734,1735,1738],{},[591,1736,1737],{},"CaptureOutputOptions"," fields:",[1690,1740,1741,1754],{},[1693,1742,1743],{},[1696,1744,1745,1748,1750,1752],{},[1699,1746,1747],{},"Field",[1699,1749,1704],{},[1699,1751,1707],{},[1699,1753,1710],{},[1712,1755,1756,1775,1792],{},[1696,1757,1758,1762,1767,1772],{},[1717,1759,1760],{},[591,1761,1595],{},[1717,1763,1764],{},[591,1765,1766],{},"boolean",[1717,1768,1769],{},[591,1770,1771],{},"true",[1717,1773,1774],{},"Capture stdout writes",[1696,1776,1777,1781,1785,1789],{},[1717,1778,1779],{},[591,1780,1599],{},[1717,1782,1783],{},[591,1784,1766],{},[1717,1786,1787],{},[591,1788,1771],{},[1717,1790,1791],{},"Capture stderr writes",[1696,1793,1794,1799,1804,1807],{},[1717,1795,1796],{},[591,1797,1798],{},"ignore",[1717,1800,1801],{},[591,1802,1803],{},"(string | RegExp)[]",[1717,1805,1806],{},"Next.js Edge bundler warnings",[1717,1808,1809],{},"Skip re-emitting matching chunks as log events",[663,1811,1813],{"className":736,"code":1812,"filename":1018,"language":739,"meta":669,"style":669},"defineNodeInstrumentation({\n captureOutput: {\n stderr: true,\n ignore: [\u002Fmy-noisy-dep\u002F, 'benign warning'],\n },\n})\n",[591,1814,1815,1823,1831,1842,1874,1879],{"__ignoreMap":669},[673,1816,1817,1819,1821],{"class":675,"line":676},[673,1818,1086],{"class":817},[673,1820,820],{"class":754},[673,1822,823],{"class":750},[673,1824,1825,1827,1829],{"class":675,"line":773},[673,1826,1187],{"class":829},[673,1828,833],{"class":750},[673,1830,917],{"class":750},[673,1832,1833,1836,1838,1840],{"class":675,"line":780},[673,1834,1835],{"class":829}," stderr",[673,1837,833],{"class":750},[673,1839,1193],{"class":1192},[673,1841,844],{"class":750},[673,1843,1844,1847,1849,1852,1855,1858,1860,1862,1864,1867,1869,1872],{"class":675,"line":826},[673,1845,1846],{"class":829}," ignore",[673,1848,833],{"class":750},[673,1850,1851],{"class":754}," [",[673,1853,1854],{"class":750},"\u002F",[673,1856,1857],{"class":682},"my-noisy-dep",[673,1859,1854],{"class":750},[673,1861,795],{"class":750},[673,1863,764],{"class":750},[673,1865,1866],{"class":682},"benign warning",[673,1868,841],{"class":750},[673,1870,1871],{"class":754},"]",[673,1873,844],{"class":750},[673,1875,1876],{"class":675,"line":847},[673,1877,1878],{"class":750}," },\n",[673,1880,1881,1883],{"class":675,"line":966},[673,1882,811],{"class":750},[673,1884,852],{"class":754},[651,1886,1888],{"id":1887},"production-configuration","Production Configuration",[587,1890,1891,1892,1894],{},"A real-world ",[591,1893,738],{}," with enrichers, batched drain, tail sampling, and route-based service names:",[1896,1897,1898],"code-collapse",{},[663,1899,1901],{"className":736,"code":1900,"filename":738,"language":739,"meta":669,"style":669},"import type { DrainContext } from 'evlog'\nimport { createEvlog } from 'evlog\u002Fnext'\nimport { createUserAgentEnricher, createRequestSizeEnricher } from 'evlog\u002Fenrichers'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\n\n\u002F\u002F 1. Enrichers - add derived context to every event\nconst enrichers = [createUserAgentEnricher(), createRequestSizeEnricher()]\n\n\u002F\u002F 2. Pipeline - batch events before sending\nconst pipeline = createDrainPipeline\u003CDrainContext>({ batch: { size: 50, intervalMs: 5000 } })\n\n\u002F\u002F 3. Drain - send batched events to Axiom\nconst drain = pipeline(createAxiomDrain({\n dataset: 'logs',\n apiKey: process.env.AXIOM_API_KEY!,\n}))\n\nexport const { withEvlog, useLogger, log, createError } = createEvlog({\n service: 'my-app',\n\n \u002F\u002F 4. Head sampling - keep 10% of info logs\n sampling: {\n rates: { info: 10 },\n keep: [\n { status: 400 }, \u002F\u002F Always keep errors\n { duration: 1000 }, \u002F\u002F Always keep slow requests\n { path: '\u002Fapi\u002Fcritical\u002F**' }, \u002F\u002F Always keep critical paths\n ],\n },\n\n \u002F\u002F 5. Route-based service names\n routes: {\n '\u002Fapi\u002Fauth\u002F**': { service: 'auth-service' },\n '\u002Fapi\u002Fpayment\u002F**': { service: 'payment-service' },\n '\u002Fapi\u002Fbooking\u002F**': { service: 'booking-service' },\n },\n\n \u002F\u002F 6. Custom tail sampling - business logic\n keep: (ctx) => {\n const user = ctx.context.user as { premium?: boolean } | undefined\n if (user?.premium) ctx.shouldKeep = true\n },\n\n \u002F\u002F 7. Enrich every event with user agent, request size, and deployment info\n enrich: (ctx) => {\n for (const enricher of enrichers) enricher(ctx)\n ctx.event.deploymentId = process.env.VERCEL_DEPLOYMENT_ID\n ctx.event.region = process.env.VERCEL_REGION\n },\n\n drain,\n})\n",[591,1902,1903,1926,1944,1969,1989,2009,2013,2018,2042,2046,2051,2107,2111,2116,2137,2153,2175,2182,2187,2220,2235,2240,2246,2256,2277,2288,2308,2326,2348,2356,2361,2366,2372,2382,2411,2438,2465,2470,2475,2481,2503,2549,2580,2585,2590,2596,2614,2644,2673,2700,2705,2710,2717],{"__ignoreMap":669},[673,1904,1905,1907,1910,1912,1915,1917,1919,1921,1924],{"class":675,"line":676},[673,1906,747],{"class":746},[673,1908,1909],{"class":746}," type",[673,1911,751],{"class":750},[673,1913,1914],{"class":754}," DrainContext",[673,1916,758],{"class":750},[673,1918,761],{"class":746},[673,1920,764],{"class":750},[673,1922,1923],{"class":682},"evlog",[673,1925,770],{"class":750},[673,1927,1928,1930,1932,1934,1936,1938,1940,1942],{"class":675,"line":773},[673,1929,747],{"class":746},[673,1931,751],{"class":750},[673,1933,755],{"class":754},[673,1935,758],{"class":750},[673,1937,761],{"class":746},[673,1939,764],{"class":750},[673,1941,767],{"class":682},[673,1943,770],{"class":750},[673,1945,1946,1948,1950,1953,1955,1958,1960,1962,1964,1967],{"class":675,"line":780},[673,1947,747],{"class":746},[673,1949,751],{"class":750},[673,1951,1952],{"class":754}," createUserAgentEnricher",[673,1954,795],{"class":750},[673,1956,1957],{"class":754}," createRequestSizeEnricher",[673,1959,758],{"class":750},[673,1961,761],{"class":746},[673,1963,764],{"class":750},[673,1965,1966],{"class":682},"evlog\u002Fenrichers",[673,1968,770],{"class":750},[673,1970,1971,1973,1975,1978,1980,1982,1984,1987],{"class":675,"line":826},[673,1972,747],{"class":746},[673,1974,751],{"class":750},[673,1976,1977],{"class":754}," createAxiomDrain",[673,1979,758],{"class":750},[673,1981,761],{"class":746},[673,1983,764],{"class":750},[673,1985,1986],{"class":682},"evlog\u002Faxiom",[673,1988,770],{"class":750},[673,1990,1991,1993,1995,1998,2000,2002,2004,2007],{"class":675,"line":847},[673,1992,747],{"class":746},[673,1994,751],{"class":750},[673,1996,1997],{"class":754}," createDrainPipeline",[673,1999,758],{"class":750},[673,2001,761],{"class":746},[673,2003,764],{"class":750},[673,2005,2006],{"class":682},"evlog\u002Fpipeline",[673,2008,770],{"class":750},[673,2010,2011],{"class":675,"line":966},[673,2012,777],{"emptyLinePlaceholder":776},[673,2014,2015],{"class":675,"line":1000},[673,2016,2017],{"class":1535},"\u002F\u002F 1. Enrichers - add derived context to every event\n",[673,2019,2020,2023,2026,2028,2030,2033,2035,2037,2039],{"class":675,"line":1490},[673,2021,2022],{"class":786},"const",[673,2024,2025],{"class":754}," enrichers ",[673,2027,901],{"class":750},[673,2029,1851],{"class":754},[673,2031,2032],{"class":817},"createUserAgentEnricher",[673,2034,1305],{"class":754},[673,2036,795],{"class":750},[673,2038,1957],{"class":817},[673,2040,2041],{"class":754},"()]\n",[673,2043,2044],{"class":675,"line":1498},[673,2045,777],{"emptyLinePlaceholder":776},[673,2047,2048],{"class":675,"line":1503},[673,2049,2050],{"class":1535},"\u002F\u002F 2. Pipeline - batch events before sending\n",[673,2052,2053,2055,2058,2060,2062,2065,2068,2071,2073,2075,2078,2080,2082,2085,2087,2091,2093,2096,2098,2101,2103,2105],{"class":675,"line":1510},[673,2054,2022],{"class":786},[673,2056,2057],{"class":754}," pipeline ",[673,2059,901],{"class":750},[673,2061,1997],{"class":817},[673,2063,2064],{"class":750},"\u003C",[673,2066,2067],{"class":679},"DrainContext",[673,2069,2070],{"class":750},">",[673,2072,820],{"class":754},[673,2074,947],{"class":750},[673,2076,2077],{"class":829}," batch",[673,2079,833],{"class":750},[673,2081,751],{"class":750},[673,2083,2084],{"class":829}," size",[673,2086,833],{"class":750},[673,2088,2090],{"class":2089},"sbssI"," 50",[673,2092,795],{"class":750},[673,2094,2095],{"class":829}," intervalMs",[673,2097,833],{"class":750},[673,2099,2100],{"class":2089}," 5000",[673,2102,758],{"class":750},[673,2104,758],{"class":750},[673,2106,852],{"class":754},[673,2108,2109],{"class":675,"line":1522},[673,2110,777],{"emptyLinePlaceholder":776},[673,2112,2113],{"class":675,"line":1532},[673,2114,2115],{"class":1535},"\u002F\u002F 3. Drain - send batched events to Axiom\n",[673,2117,2118,2120,2123,2125,2128,2130,2133,2135],{"class":675,"line":1539},[673,2119,2022],{"class":786},[673,2121,2122],{"class":754}," drain ",[673,2124,901],{"class":750},[673,2126,2127],{"class":817}," pipeline",[673,2129,820],{"class":754},[673,2131,2132],{"class":817},"createAxiomDrain",[673,2134,820],{"class":754},[673,2136,823],{"class":750},[673,2138,2139,2142,2144,2146,2149,2151],{"class":675,"line":1545},[673,2140,2141],{"class":829}," dataset",[673,2143,833],{"class":750},[673,2145,764],{"class":750},[673,2147,2148],{"class":682},"logs",[673,2150,841],{"class":750},[673,2152,844],{"class":750},[673,2154,2155,2158,2160,2163,2165,2167,2169,2172],{"class":675,"line":1557},[673,2156,2157],{"class":829}," apiKey",[673,2159,833],{"class":750},[673,2161,2162],{"class":754}," process",[673,2164,939],{"class":750},[673,2166,1674],{"class":754},[673,2168,939],{"class":750},[673,2170,2171],{"class":754},"AXIOM_API_KEY",[673,2173,2174],{"class":750},"!,\n",[673,2176,2177,2179],{"class":675,"line":1563},[673,2178,811],{"class":750},[673,2180,2181],{"class":754},"))\n",[673,2183,2185],{"class":675,"line":2184},18,[673,2186,777],{"emptyLinePlaceholder":776},[673,2188,2190,2192,2194,2196,2198,2200,2202,2204,2206,2208,2210,2212,2214,2216,2218],{"class":675,"line":2189},19,[673,2191,783],{"class":746},[673,2193,787],{"class":786},[673,2195,751],{"class":750},[673,2197,792],{"class":754},[673,2199,795],{"class":750},[673,2201,798],{"class":754},[673,2203,795],{"class":750},[673,2205,803],{"class":754},[673,2207,795],{"class":750},[673,2209,808],{"class":754},[673,2211,811],{"class":750},[673,2213,814],{"class":750},[673,2215,755],{"class":817},[673,2217,820],{"class":754},[673,2219,823],{"class":750},[673,2221,2223,2225,2227,2229,2231,2233],{"class":675,"line":2222},20,[673,2224,830],{"class":829},[673,2226,833],{"class":750},[673,2228,764],{"class":750},[673,2230,838],{"class":682},[673,2232,841],{"class":750},[673,2234,844],{"class":750},[673,2236,2238],{"class":675,"line":2237},21,[673,2239,777],{"emptyLinePlaceholder":776},[673,2241,2243],{"class":675,"line":2242},22,[673,2244,2245],{"class":1535}," \u002F\u002F 4. Head sampling - keep 10% of info logs\n",[673,2247,2249,2252,2254],{"class":675,"line":2248},23,[673,2250,2251],{"class":829}," sampling",[673,2253,833],{"class":750},[673,2255,917],{"class":750},[673,2257,2259,2262,2264,2266,2269,2271,2274],{"class":675,"line":2258},24,[673,2260,2261],{"class":829}," rates",[673,2263,833],{"class":750},[673,2265,751],{"class":750},[673,2267,2268],{"class":829}," info",[673,2270,833],{"class":750},[673,2272,2273],{"class":2089}," 10",[673,2275,2276],{"class":750}," },\n",[673,2278,2280,2283,2285],{"class":675,"line":2279},25,[673,2281,2282],{"class":829}," keep",[673,2284,833],{"class":750},[673,2286,2287],{"class":754}," [\n",[673,2289,2291,2294,2297,2299,2302,2305],{"class":675,"line":2290},26,[673,2292,2293],{"class":750}," {",[673,2295,2296],{"class":829}," status",[673,2298,833],{"class":750},[673,2300,2301],{"class":2089}," 400",[673,2303,2304],{"class":750}," },",[673,2306,2307],{"class":1535}," \u002F\u002F Always keep errors\n",[673,2309,2311,2313,2316,2318,2321,2323],{"class":675,"line":2310},27,[673,2312,2293],{"class":750},[673,2314,2315],{"class":829}," duration",[673,2317,833],{"class":750},[673,2319,2320],{"class":2089}," 1000",[673,2322,2304],{"class":750},[673,2324,2325],{"class":1535}," \u002F\u002F Always keep slow requests\n",[673,2327,2329,2331,2334,2336,2338,2341,2343,2345],{"class":675,"line":2328},28,[673,2330,2293],{"class":750},[673,2332,2333],{"class":829}," path",[673,2335,833],{"class":750},[673,2337,764],{"class":750},[673,2339,2340],{"class":682},"\u002Fapi\u002Fcritical\u002F**",[673,2342,841],{"class":750},[673,2344,2304],{"class":750},[673,2346,2347],{"class":1535}," \u002F\u002F Always keep critical paths\n",[673,2349,2351,2354],{"class":675,"line":2350},29,[673,2352,2353],{"class":754}," ]",[673,2355,844],{"class":750},[673,2357,2359],{"class":675,"line":2358},30,[673,2360,1878],{"class":750},[673,2362,2364],{"class":675,"line":2363},31,[673,2365,777],{"emptyLinePlaceholder":776},[673,2367,2369],{"class":675,"line":2368},32,[673,2370,2371],{"class":1535}," \u002F\u002F 5. Route-based service names\n",[673,2373,2375,2378,2380],{"class":675,"line":2374},33,[673,2376,2377],{"class":829}," routes",[673,2379,833],{"class":750},[673,2381,917],{"class":750},[673,2383,2385,2388,2391,2393,2395,2397,2400,2402,2404,2407,2409],{"class":675,"line":2384},34,[673,2386,2387],{"class":750}," '",[673,2389,2390],{"class":829},"\u002Fapi\u002Fauth\u002F**",[673,2392,841],{"class":750},[673,2394,833],{"class":750},[673,2396,751],{"class":750},[673,2398,2399],{"class":829}," service",[673,2401,833],{"class":750},[673,2403,764],{"class":750},[673,2405,2406],{"class":682},"auth-service",[673,2408,841],{"class":750},[673,2410,2276],{"class":750},[673,2412,2414,2416,2419,2421,2423,2425,2427,2429,2431,2434,2436],{"class":675,"line":2413},35,[673,2415,2387],{"class":750},[673,2417,2418],{"class":829},"\u002Fapi\u002Fpayment\u002F**",[673,2420,841],{"class":750},[673,2422,833],{"class":750},[673,2424,751],{"class":750},[673,2426,2399],{"class":829},[673,2428,833],{"class":750},[673,2430,764],{"class":750},[673,2432,2433],{"class":682},"payment-service",[673,2435,841],{"class":750},[673,2437,2276],{"class":750},[673,2439,2441,2443,2446,2448,2450,2452,2454,2456,2458,2461,2463],{"class":675,"line":2440},36,[673,2442,2387],{"class":750},[673,2444,2445],{"class":829},"\u002Fapi\u002Fbooking\u002F**",[673,2447,841],{"class":750},[673,2449,833],{"class":750},[673,2451,751],{"class":750},[673,2453,2399],{"class":829},[673,2455,833],{"class":750},[673,2457,764],{"class":750},[673,2459,2460],{"class":682},"booking-service",[673,2462,841],{"class":750},[673,2464,2276],{"class":750},[673,2466,2468],{"class":675,"line":2467},37,[673,2469,1878],{"class":750},[673,2471,2473],{"class":675,"line":2472},38,[673,2474,777],{"emptyLinePlaceholder":776},[673,2476,2478],{"class":675,"line":2477},39,[673,2479,2480],{"class":1535}," \u002F\u002F 6. Custom tail sampling - business logic\n",[673,2482,2484,2487,2489,2492,2496,2499,2501],{"class":675,"line":2483},40,[673,2485,2486],{"class":817}," keep",[673,2488,833],{"class":750},[673,2490,2491],{"class":750}," (",[673,2493,2495],{"class":2494},"sHdIc","ctx",[673,2497,2498],{"class":750},")",[673,2500,914],{"class":786},[673,2502,917],{"class":750},[673,2504,2506,2509,2512,2514,2517,2519,2522,2524,2527,2530,2532,2535,2538,2541,2543,2546],{"class":675,"line":2505},41,[673,2507,2508],{"class":786}," const",[673,2510,2511],{"class":754}," user",[673,2513,814],{"class":750},[673,2515,2516],{"class":754}," ctx",[673,2518,939],{"class":750},[673,2520,2521],{"class":754},"context",[673,2523,939],{"class":750},[673,2525,2526],{"class":754},"user",[673,2528,2529],{"class":746}," as",[673,2531,751],{"class":750},[673,2533,2534],{"class":829}," premium",[673,2536,2537],{"class":750},"?:",[673,2539,2540],{"class":679}," boolean",[673,2542,758],{"class":750},[673,2544,2545],{"class":750}," |",[673,2547,2548],{"class":679}," undefined\n",[673,2550,2552,2555,2557,2559,2562,2565,2568,2570,2572,2575,2577],{"class":675,"line":2551},42,[673,2553,2554],{"class":746}," if",[673,2556,2491],{"class":829},[673,2558,2526],{"class":754},[673,2560,2561],{"class":750},"?.",[673,2563,2564],{"class":754},"premium",[673,2566,2567],{"class":829},") ",[673,2569,2495],{"class":754},[673,2571,939],{"class":750},[673,2573,2574],{"class":754},"shouldKeep",[673,2576,814],{"class":750},[673,2578,2579],{"class":1192}," true\n",[673,2581,2583],{"class":675,"line":2582},43,[673,2584,1878],{"class":750},[673,2586,2588],{"class":675,"line":2587},44,[673,2589,777],{"emptyLinePlaceholder":776},[673,2591,2593],{"class":675,"line":2592},45,[673,2594,2595],{"class":1535}," \u002F\u002F 7. Enrich every event with user agent, request size, and deployment info\n",[673,2597,2599,2602,2604,2606,2608,2610,2612],{"class":675,"line":2598},46,[673,2600,2601],{"class":817}," enrich",[673,2603,833],{"class":750},[673,2605,2491],{"class":750},[673,2607,2495],{"class":2494},[673,2609,2498],{"class":750},[673,2611,914],{"class":786},[673,2613,917],{"class":750},[673,2615,2617,2620,2622,2624,2627,2630,2633,2635,2638,2640,2642],{"class":675,"line":2616},47,[673,2618,2619],{"class":746}," for",[673,2621,2491],{"class":829},[673,2623,2022],{"class":786},[673,2625,2626],{"class":754}," enricher",[673,2628,2629],{"class":750}," of",[673,2631,2632],{"class":754}," enrichers",[673,2634,2567],{"class":829},[673,2636,2637],{"class":817},"enricher",[673,2639,820],{"class":829},[673,2641,2495],{"class":754},[673,2643,852],{"class":829},[673,2645,2647,2650,2652,2655,2657,2660,2662,2664,2666,2668,2670],{"class":675,"line":2646},48,[673,2648,2649],{"class":754}," ctx",[673,2651,939],{"class":750},[673,2653,2654],{"class":754},"event",[673,2656,939],{"class":750},[673,2658,2659],{"class":754},"deploymentId",[673,2661,814],{"class":750},[673,2663,2162],{"class":754},[673,2665,939],{"class":750},[673,2667,1674],{"class":754},[673,2669,939],{"class":750},[673,2671,2672],{"class":754},"VERCEL_DEPLOYMENT_ID\n",[673,2674,2676,2678,2680,2682,2684,2687,2689,2691,2693,2695,2697],{"class":675,"line":2675},49,[673,2677,2649],{"class":754},[673,2679,939],{"class":750},[673,2681,2654],{"class":754},[673,2683,939],{"class":750},[673,2685,2686],{"class":754},"region",[673,2688,814],{"class":750},[673,2690,2162],{"class":754},[673,2692,939],{"class":750},[673,2694,1674],{"class":754},[673,2696,939],{"class":750},[673,2698,2699],{"class":754},"VERCEL_REGION\n",[673,2701,2703],{"class":675,"line":2702},50,[673,2704,1878],{"class":750},[673,2706,2708],{"class":675,"line":2707},51,[673,2709,777],{"emptyLinePlaceholder":776},[673,2711,2713,2715],{"class":675,"line":2712},52,[673,2714,1298],{"class":754},[673,2716,844],{"class":750},[673,2718,2720,2722],{"class":675,"line":2719},53,[673,2721,811],{"class":750},[673,2723,852],{"class":754},[1025,2725,2728,2729,2732,2733,2736,2737,2740,2741,2744,2745,2748],{"color":2726,"icon":2727},"neutral","i-lucide-cloud","On Vercel, ",[591,2730,2731],{},"withEvlog"," registers drain work with Next's ",[591,2734,2735],{},"after()",", and with a pipeline it also registers ",[591,2738,2739],{},"drain.settled()",": the function stays alive until the buffered batch is delivered, or dropped once retries are exhausted. ",[591,2742,2743],{},"batch.intervalMs"," bounds when the first delivery attempt starts; retry backoff can extend the lifetime past it. If your ingest endpoint is slow enough to hit the default 5s request timeout, raise it (",[591,2746,2747],{},"createAxiomDrain({ timeout: 15000 })","): a timed-out request that actually landed gets retried, and non-idempotent ingest APIs count that twice.",[651,2750,51],{"id":2751},"wide-events",[587,2753,2754],{},"Build up context progressively through your handler. One request = one wide event:",[663,2756,2759],{"className":736,"code":2757,"filename":2758,"language":739,"meta":669,"style":669},"import { withEvlog, useLogger } from '@\u002Flib\u002Fevlog'\n\nexport const POST = withEvlog(async (request: Request) => {\n const log = useLogger()\n const body = await request.json()\n\n \u002F\u002F Stage 1: User context\n log.set({\n user: { id: body.userId, plan: 'enterprise' },\n })\n\n \u002F\u002F Stage 2: Cart context\n log.set({\n cart: { items: body.items.length, total: body.total, currency: 'USD' },\n })\n\n \u002F\u002F Stage 3: Payment context\n const payment = await processPayment(body)\n log.set({\n payment: { method: payment.method, cardLast4: payment.last4 },\n })\n\n return Response.json({ success: true, orderId: payment.orderId })\n})\n","app\u002Fapi\u002Fcheckout\u002Froute.ts",[591,2760,2761,2783,2787,2820,2832,2852,2856,2861,2873,2910,2916,2920,2925,2937,2993,2999,3003,3008,3029,3041,3078,3084,3088,3127],{"__ignoreMap":669},[673,2762,2763,2765,2767,2769,2771,2773,2775,2777,2779,2781],{"class":675,"line":676},[673,2764,747],{"class":746},[673,2766,751],{"class":750},[673,2768,792],{"class":754},[673,2770,795],{"class":750},[673,2772,798],{"class":754},[673,2774,758],{"class":750},[673,2776,761],{"class":746},[673,2778,764],{"class":750},[673,2780,883],{"class":682},[673,2782,770],{"class":750},[673,2784,2785],{"class":675,"line":773},[673,2786,777],{"emptyLinePlaceholder":776},[673,2788,2789,2791,2793,2796,2798,2800,2802,2804,2806,2809,2811,2814,2816,2818],{"class":675,"line":780},[673,2790,783],{"class":746},[673,2792,787],{"class":786},[673,2794,2795],{"class":754}," POST ",[673,2797,901],{"class":750},[673,2799,792],{"class":817},[673,2801,820],{"class":754},[673,2803,908],{"class":786},[673,2805,2491],{"class":750},[673,2807,2808],{"class":2494},"request",[673,2810,833],{"class":750},[673,2812,2813],{"class":679}," Request",[673,2815,2498],{"class":750},[673,2817,914],{"class":786},[673,2819,917],{"class":750},[673,2821,2822,2824,2826,2828,2830],{"class":675,"line":826},[673,2823,922],{"class":786},[673,2825,803],{"class":754},[673,2827,814],{"class":750},[673,2829,798],{"class":817},[673,2831,931],{"class":829},[673,2833,2834,2836,2839,2841,2843,2846,2848,2850],{"class":675,"line":847},[673,2835,922],{"class":786},[673,2837,2838],{"class":754}," body",[673,2840,814],{"class":750},[673,2842,1414],{"class":746},[673,2844,2845],{"class":754}," request",[673,2847,939],{"class":750},[673,2849,977],{"class":817},[673,2851,931],{"class":829},[673,2853,2854],{"class":675,"line":966},[673,2855,777],{"emptyLinePlaceholder":776},[673,2857,2858],{"class":675,"line":1000},[673,2859,2860],{"class":1535}," \u002F\u002F Stage 1: User context\n",[673,2862,2863,2865,2867,2869,2871],{"class":675,"line":1490},[673,2864,936],{"class":754},[673,2866,939],{"class":750},[673,2868,942],{"class":817},[673,2870,820],{"class":829},[673,2872,823],{"class":750},[673,2874,2875,2878,2880,2882,2885,2887,2889,2891,2894,2896,2899,2901,2903,2906,2908],{"class":675,"line":1498},[673,2876,2877],{"class":829}," user",[673,2879,833],{"class":750},[673,2881,751],{"class":750},[673,2883,2884],{"class":829}," id",[673,2886,833],{"class":750},[673,2888,2838],{"class":754},[673,2890,939],{"class":750},[673,2892,2893],{"class":754},"userId",[673,2895,795],{"class":750},[673,2897,2898],{"class":829}," plan",[673,2900,833],{"class":750},[673,2902,764],{"class":750},[673,2904,2905],{"class":682},"enterprise",[673,2907,841],{"class":750},[673,2909,2276],{"class":750},[673,2911,2912,2914],{"class":675,"line":1503},[673,2913,1493],{"class":750},[673,2915,852],{"class":829},[673,2917,2918],{"class":675,"line":1510},[673,2919,777],{"emptyLinePlaceholder":776},[673,2921,2922],{"class":675,"line":1522},[673,2923,2924],{"class":1535}," \u002F\u002F Stage 2: Cart context\n",[673,2926,2927,2929,2931,2933,2935],{"class":675,"line":1532},[673,2928,936],{"class":754},[673,2930,939],{"class":750},[673,2932,942],{"class":817},[673,2934,820],{"class":829},[673,2936,823],{"class":750},[673,2938,2939,2942,2944,2946,2949,2951,2953,2955,2958,2960,2963,2965,2968,2970,2972,2974,2977,2979,2982,2984,2986,2989,2991],{"class":675,"line":1539},[673,2940,2941],{"class":829}," cart",[673,2943,833],{"class":750},[673,2945,751],{"class":750},[673,2947,2948],{"class":829}," items",[673,2950,833],{"class":750},[673,2952,2838],{"class":754},[673,2954,939],{"class":750},[673,2956,2957],{"class":754},"items",[673,2959,939],{"class":750},[673,2961,2962],{"class":754},"length",[673,2964,795],{"class":750},[673,2966,2967],{"class":829}," total",[673,2969,833],{"class":750},[673,2971,2838],{"class":754},[673,2973,939],{"class":750},[673,2975,2976],{"class":754},"total",[673,2978,795],{"class":750},[673,2980,2981],{"class":829}," currency",[673,2983,833],{"class":750},[673,2985,764],{"class":750},[673,2987,2988],{"class":682},"USD",[673,2990,841],{"class":750},[673,2992,2276],{"class":750},[673,2994,2995,2997],{"class":675,"line":1545},[673,2996,1493],{"class":750},[673,2998,852],{"class":829},[673,3000,3001],{"class":675,"line":1557},[673,3002,777],{"emptyLinePlaceholder":776},[673,3004,3005],{"class":675,"line":1563},[673,3006,3007],{"class":1535}," \u002F\u002F Stage 3: Payment context\n",[673,3009,3010,3012,3015,3017,3019,3022,3024,3027],{"class":675,"line":2184},[673,3011,922],{"class":786},[673,3013,3014],{"class":754}," payment",[673,3016,814],{"class":750},[673,3018,1414],{"class":746},[673,3020,3021],{"class":817}," processPayment",[673,3023,820],{"class":829},[673,3025,3026],{"class":754},"body",[673,3028,852],{"class":829},[673,3030,3031,3033,3035,3037,3039],{"class":675,"line":2189},[673,3032,936],{"class":754},[673,3034,939],{"class":750},[673,3036,942],{"class":817},[673,3038,820],{"class":829},[673,3040,823],{"class":750},[673,3042,3043,3046,3048,3050,3053,3055,3057,3059,3062,3064,3067,3069,3071,3073,3076],{"class":675,"line":2222},[673,3044,3045],{"class":829}," payment",[673,3047,833],{"class":750},[673,3049,751],{"class":750},[673,3051,3052],{"class":829}," method",[673,3054,833],{"class":750},[673,3056,3014],{"class":754},[673,3058,939],{"class":750},[673,3060,3061],{"class":754},"method",[673,3063,795],{"class":750},[673,3065,3066],{"class":829}," cardLast4",[673,3068,833],{"class":750},[673,3070,3014],{"class":754},[673,3072,939],{"class":750},[673,3074,3075],{"class":754},"last4",[673,3077,2276],{"class":750},[673,3079,3080,3082],{"class":675,"line":2237},[673,3081,1493],{"class":750},[673,3083,852],{"class":829},[673,3085,3086],{"class":675,"line":2242},[673,3087,777],{"emptyLinePlaceholder":776},[673,3089,3090,3092,3094,3096,3098,3100,3102,3105,3107,3109,3111,3114,3116,3118,3120,3123,3125],{"class":675,"line":2248},[673,3091,969],{"class":746},[673,3093,972],{"class":754},[673,3095,939],{"class":750},[673,3097,977],{"class":817},[673,3099,820],{"class":829},[673,3101,947],{"class":750},[673,3103,3104],{"class":829}," success",[673,3106,833],{"class":750},[673,3108,1193],{"class":1192},[673,3110,795],{"class":750},[673,3112,3113],{"class":829}," orderId",[673,3115,833],{"class":750},[673,3117,3014],{"class":754},[673,3119,939],{"class":750},[673,3121,3122],{"class":754},"orderId",[673,3124,758],{"class":750},[673,3126,852],{"class":829},[673,3128,3129,3131],{"class":675,"line":2258},[673,3130,811],{"class":750},[673,3132,852],{"class":754},[587,3134,3135],{},"All fields are merged into a single wide event emitted when the handler completes (or when a streaming response body finishes, so AI SDK metadata is included):",[663,3137,3140],{"className":665,"code":3138,"filename":3139,"language":668,"meta":669,"style":669},"10:23:45.612 INFO [my-app] POST \u002Fapi\u002Fcheckout 200 in 145ms\n ├─ user: id=usr_123 plan=enterprise\n ├─ cart: items=3 total=14999 currency=USD\n ├─ payment: method=card cardLast4=4242\n └─ requestId: a1b2c3d4-...\n","Output (Pretty)",[591,3141,3142,3153,3167,3189,3205],{"__ignoreMap":669},[673,3143,3144,3147,3150],{"class":675,"line":676},[673,3145,3146],{"class":679},"10:23:45.612",[673,3148,3149],{"class":682}," INFO",[673,3151,3152],{"class":754}," [my-app] POST \u002Fapi\u002Fcheckout 200 in 145ms\n",[673,3154,3155,3158,3161,3164],{"class":675,"line":773},[673,3156,3157],{"class":679}," ├─",[673,3159,3160],{"class":682}," user:",[673,3162,3163],{"class":682}," id=usr_123",[673,3165,3166],{"class":682}," plan=enterprise\n",[673,3168,3169,3171,3174,3177,3180,3183,3186],{"class":675,"line":780},[673,3170,3157],{"class":679},[673,3172,3173],{"class":682}," cart:",[673,3175,3176],{"class":682}," items=",[673,3178,3179],{"class":2089},"3",[673,3181,3182],{"class":682}," total=",[673,3184,3185],{"class":2089},"14999",[673,3187,3188],{"class":682}," currency=USD\n",[673,3190,3191,3193,3196,3199,3202],{"class":675,"line":826},[673,3192,3157],{"class":679},[673,3194,3195],{"class":682}," payment:",[673,3197,3198],{"class":682}," method=card",[673,3200,3201],{"class":682}," cardLast4=",[673,3203,3204],{"class":2089},"4242\n",[673,3206,3207,3210,3213],{"class":675,"line":847},[673,3208,3209],{"class":679}," └─",[673,3211,3212],{"class":682}," requestId:",[673,3214,3215],{"class":682}," a1b2c3d4-...\n",[651,3217,3219,3220,2498],{"id":3218},"background-work-logfork","Background work (",[591,3221,3222],{},"log.fork",[587,3224,3225,3226,1609,3228,3230,3231,3236,3237,3241],{},"Inside ",[591,3227,2731],{},[591,3229,601],{}," returns a logger with ",[1036,3232,3233],{},[591,3234,3235],{},"fork"," for child wide events. See ",[640,3238,3240],{"href":3239},"\u002Flearn\u002Fwide-events#after-emit-sealing-and-background-work","After emit"," in Wide events.",[663,3243,3246],{"className":736,"code":3244,"filename":3245,"language":739,"meta":669,"style":669},"import { withEvlog, useLogger } from '@\u002Flib\u002Fevlog'\n\nexport const POST = withEvlog(async () => {\n const log = useLogger()\n log.fork!('enqueue', async () => {\n const child = useLogger()\n child.set({ job: 'queued' })\n })\n return Response.json({ ok: true })\n})\n","app\u002Fapi\u002Forders\u002Froute.ts",[591,3247,3248,3270,3274,3296,3308,3339,3352,3381,3387,3412],{"__ignoreMap":669},[673,3249,3250,3252,3254,3256,3258,3260,3262,3264,3266,3268],{"class":675,"line":676},[673,3251,747],{"class":746},[673,3253,751],{"class":750},[673,3255,792],{"class":754},[673,3257,795],{"class":750},[673,3259,798],{"class":754},[673,3261,758],{"class":750},[673,3263,761],{"class":746},[673,3265,764],{"class":750},[673,3267,883],{"class":682},[673,3269,770],{"class":750},[673,3271,3272],{"class":675,"line":773},[673,3273,777],{"emptyLinePlaceholder":776},[673,3275,3276,3278,3280,3282,3284,3286,3288,3290,3292,3294],{"class":675,"line":780},[673,3277,783],{"class":746},[673,3279,787],{"class":786},[673,3281,2795],{"class":754},[673,3283,901],{"class":750},[673,3285,792],{"class":817},[673,3287,820],{"class":754},[673,3289,908],{"class":786},[673,3291,911],{"class":750},[673,3293,914],{"class":786},[673,3295,917],{"class":750},[673,3297,3298,3300,3302,3304,3306],{"class":675,"line":826},[673,3299,922],{"class":786},[673,3301,803],{"class":754},[673,3303,814],{"class":750},[673,3305,798],{"class":817},[673,3307,931],{"class":829},[673,3309,3310,3312,3314,3316,3319,3321,3323,3326,3328,3330,3333,3335,3337],{"class":675,"line":847},[673,3311,936],{"class":754},[673,3313,939],{"class":750},[673,3315,3235],{"class":817},[673,3317,3318],{"class":750},"!",[673,3320,820],{"class":829},[673,3322,841],{"class":750},[673,3324,3325],{"class":682},"enqueue",[673,3327,841],{"class":750},[673,3329,795],{"class":750},[673,3331,3332],{"class":786}," async",[673,3334,911],{"class":750},[673,3336,914],{"class":786},[673,3338,917],{"class":750},[673,3340,3341,3343,3346,3348,3350],{"class":675,"line":966},[673,3342,2508],{"class":786},[673,3344,3345],{"class":754}," child",[673,3347,814],{"class":750},[673,3349,798],{"class":817},[673,3351,931],{"class":829},[673,3353,3354,3357,3359,3361,3363,3365,3368,3370,3372,3375,3377,3379],{"class":675,"line":1000},[673,3355,3356],{"class":754}," child",[673,3358,939],{"class":750},[673,3360,942],{"class":817},[673,3362,820],{"class":829},[673,3364,947],{"class":750},[673,3366,3367],{"class":829}," job",[673,3369,833],{"class":750},[673,3371,764],{"class":750},[673,3373,3374],{"class":682},"queued",[673,3376,841],{"class":750},[673,3378,758],{"class":750},[673,3380,852],{"class":829},[673,3382,3383,3385],{"class":675,"line":1490},[673,3384,1493],{"class":750},[673,3386,852],{"class":829},[673,3388,3389,3391,3393,3395,3397,3399,3401,3404,3406,3408,3410],{"class":675,"line":1498},[673,3390,969],{"class":746},[673,3392,972],{"class":754},[673,3394,939],{"class":750},[673,3396,977],{"class":817},[673,3398,820],{"class":829},[673,3400,947],{"class":750},[673,3402,3403],{"class":829}," ok",[673,3405,833],{"class":750},[673,3407,1193],{"class":1192},[673,3409,758],{"class":750},[673,3411,852],{"class":829},[673,3413,3414,3416],{"class":675,"line":1503},[673,3415,811],{"class":750},[673,3417,852],{"class":754},[651,3419,3421],{"id":3420},"error-handling","Error Handling",[587,3423,3424,3425,3428,3429,1609,3432,3435,3436,3439],{},"Use ",[591,3426,3427],{},"createError"," for structured errors with ",[591,3430,3431],{},"why",[591,3433,3434],{},"fix",", and ",[591,3437,3438],{},"link"," fields that help developers debug in both logs and API responses:",[1896,3441,3442],{},[663,3443,3446],{"className":736,"code":3444,"filename":3445,"language":739,"meta":669,"style":669},"import { withEvlog, useLogger, createError } from '@\u002Flib\u002Fevlog'\n\nexport const POST = withEvlog(async (request: Request) => {\n const log = useLogger()\n const body = await request.json()\n\n log.set({ payment: { amount: body.amount } })\n\n if (body.amount \u003C= 0) {\n throw createError({\n status: 400,\n message: 'Invalid payment amount',\n why: 'The amount must be a positive number',\n fix: 'Pass a positive integer in cents (e.g. 4999 for $49.99)',\n link: 'https:\u002F\u002Fdocs.example.com\u002Fapi\u002Fpayments#amount',\n })\n }\n\n const result = await chargeCard(body)\n\n if (!result.success) {\n log.error(new Error(`Payment declined: ${result.reason}`))\n throw createError({\n status: 402,\n message: 'Payment declined',\n why: `Card declined by issuer: ${result.reason}`,\n fix: 'Try a different payment method or contact your bank',\n })\n }\n\n return Response.json({ success: true })\n})\n","app\u002Fapi\u002Fpayment\u002Fprocess\u002Froute.ts",[591,3447,3448,3475,3479,3509,3521,3539,3543,3579,3583,3606,3617,3628,3644,3660,3676,3692,3699,3703,3707,3727,3731,3751,3792,3802,3813,3828,3852,3867,3873,3877,3881,3905],{"__ignoreMap":669},[673,3449,3450,3452,3454,3456,3458,3460,3462,3465,3467,3469,3471,3473],{"class":675,"line":676},[673,3451,747],{"class":746},[673,3453,751],{"class":750},[673,3455,792],{"class":754},[673,3457,795],{"class":750},[673,3459,798],{"class":754},[673,3461,795],{"class":750},[673,3463,3464],{"class":754}," createError",[673,3466,758],{"class":750},[673,3468,761],{"class":746},[673,3470,764],{"class":750},[673,3472,883],{"class":682},[673,3474,770],{"class":750},[673,3476,3477],{"class":675,"line":773},[673,3478,777],{"emptyLinePlaceholder":776},[673,3480,3481,3483,3485,3487,3489,3491,3493,3495,3497,3499,3501,3503,3505,3507],{"class":675,"line":780},[673,3482,783],{"class":746},[673,3484,787],{"class":786},[673,3486,2795],{"class":754},[673,3488,901],{"class":750},[673,3490,792],{"class":817},[673,3492,820],{"class":754},[673,3494,908],{"class":786},[673,3496,2491],{"class":750},[673,3498,2808],{"class":2494},[673,3500,833],{"class":750},[673,3502,2813],{"class":679},[673,3504,2498],{"class":750},[673,3506,914],{"class":786},[673,3508,917],{"class":750},[673,3510,3511,3513,3515,3517,3519],{"class":675,"line":826},[673,3512,922],{"class":786},[673,3514,803],{"class":754},[673,3516,814],{"class":750},[673,3518,798],{"class":817},[673,3520,931],{"class":829},[673,3522,3523,3525,3527,3529,3531,3533,3535,3537],{"class":675,"line":847},[673,3524,922],{"class":786},[673,3526,2838],{"class":754},[673,3528,814],{"class":750},[673,3530,1414],{"class":746},[673,3532,2845],{"class":754},[673,3534,939],{"class":750},[673,3536,977],{"class":817},[673,3538,931],{"class":829},[673,3540,3541],{"class":675,"line":966},[673,3542,777],{"emptyLinePlaceholder":776},[673,3544,3545,3547,3549,3551,3553,3555,3557,3559,3561,3564,3566,3568,3570,3573,3575,3577],{"class":675,"line":1000},[673,3546,936],{"class":754},[673,3548,939],{"class":750},[673,3550,942],{"class":817},[673,3552,820],{"class":829},[673,3554,947],{"class":750},[673,3556,3014],{"class":829},[673,3558,833],{"class":750},[673,3560,751],{"class":750},[673,3562,3563],{"class":829}," amount",[673,3565,833],{"class":750},[673,3567,2838],{"class":754},[673,3569,939],{"class":750},[673,3571,3572],{"class":754},"amount",[673,3574,758],{"class":750},[673,3576,758],{"class":750},[673,3578,852],{"class":829},[673,3580,3581],{"class":675,"line":1490},[673,3582,777],{"emptyLinePlaceholder":776},[673,3584,3585,3588,3590,3592,3594,3596,3599,3602,3604],{"class":675,"line":1498},[673,3586,3587],{"class":746}," if",[673,3589,2491],{"class":829},[673,3591,3026],{"class":754},[673,3593,939],{"class":750},[673,3595,3572],{"class":754},[673,3597,3598],{"class":750}," \u003C=",[673,3600,3601],{"class":2089}," 0",[673,3603,2567],{"class":829},[673,3605,823],{"class":750},[673,3607,3608,3611,3613,3615],{"class":675,"line":1503},[673,3609,3610],{"class":746}," throw",[673,3612,3464],{"class":817},[673,3614,820],{"class":829},[673,3616,823],{"class":750},[673,3618,3619,3622,3624,3626],{"class":675,"line":1510},[673,3620,3621],{"class":829}," status",[673,3623,833],{"class":750},[673,3625,2301],{"class":2089},[673,3627,844],{"class":750},[673,3629,3630,3633,3635,3637,3640,3642],{"class":675,"line":1522},[673,3631,3632],{"class":829}," message",[673,3634,833],{"class":750},[673,3636,764],{"class":750},[673,3638,3639],{"class":682},"Invalid payment amount",[673,3641,841],{"class":750},[673,3643,844],{"class":750},[673,3645,3646,3649,3651,3653,3656,3658],{"class":675,"line":1532},[673,3647,3648],{"class":829}," why",[673,3650,833],{"class":750},[673,3652,764],{"class":750},[673,3654,3655],{"class":682},"The amount must be a positive number",[673,3657,841],{"class":750},[673,3659,844],{"class":750},[673,3661,3662,3665,3667,3669,3672,3674],{"class":675,"line":1539},[673,3663,3664],{"class":829}," fix",[673,3666,833],{"class":750},[673,3668,764],{"class":750},[673,3670,3671],{"class":682},"Pass a positive integer in cents (e.g. 4999 for $49.99)",[673,3673,841],{"class":750},[673,3675,844],{"class":750},[673,3677,3678,3681,3683,3685,3688,3690],{"class":675,"line":1545},[673,3679,3680],{"class":829}," link",[673,3682,833],{"class":750},[673,3684,764],{"class":750},[673,3686,3687],{"class":682},"https:\u002F\u002Fdocs.example.com\u002Fapi\u002Fpayments#amount",[673,3689,841],{"class":750},[673,3691,844],{"class":750},[673,3693,3694,3697],{"class":675,"line":1557},[673,3695,3696],{"class":750}," }",[673,3698,852],{"class":829},[673,3700,3701],{"class":675,"line":1563},[673,3702,1560],{"class":750},[673,3704,3705],{"class":675,"line":2184},[673,3706,777],{"emptyLinePlaceholder":776},[673,3708,3709,3711,3714,3716,3718,3721,3723,3725],{"class":675,"line":2189},[673,3710,922],{"class":786},[673,3712,3713],{"class":754}," result",[673,3715,814],{"class":750},[673,3717,1414],{"class":746},[673,3719,3720],{"class":817}," chargeCard",[673,3722,820],{"class":829},[673,3724,3026],{"class":754},[673,3726,852],{"class":829},[673,3728,3729],{"class":675,"line":2222},[673,3730,777],{"emptyLinePlaceholder":776},[673,3732,3733,3735,3737,3739,3742,3744,3747,3749],{"class":675,"line":2237},[673,3734,3587],{"class":746},[673,3736,2491],{"class":829},[673,3738,3318],{"class":750},[673,3740,3741],{"class":754},"result",[673,3743,939],{"class":750},[673,3745,3746],{"class":754},"success",[673,3748,2567],{"class":829},[673,3750,823],{"class":750},[673,3752,3753,3756,3758,3761,3763,3766,3769,3771,3774,3777,3780,3782,3784,3787,3790],{"class":675,"line":2242},[673,3754,3755],{"class":754}," log",[673,3757,939],{"class":750},[673,3759,3760],{"class":817},"error",[673,3762,820],{"class":829},[673,3764,3765],{"class":750},"new",[673,3767,3768],{"class":817}," Error",[673,3770,820],{"class":829},[673,3772,3773],{"class":750},"`",[673,3775,3776],{"class":682},"Payment declined: ",[673,3778,3779],{"class":750},"${",[673,3781,3741],{"class":754},[673,3783,939],{"class":750},[673,3785,3786],{"class":754},"reason",[673,3788,3789],{"class":750},"}`",[673,3791,2181],{"class":829},[673,3793,3794,3796,3798,3800],{"class":675,"line":2248},[673,3795,3610],{"class":746},[673,3797,3464],{"class":817},[673,3799,820],{"class":829},[673,3801,823],{"class":750},[673,3803,3804,3806,3808,3811],{"class":675,"line":2258},[673,3805,3621],{"class":829},[673,3807,833],{"class":750},[673,3809,3810],{"class":2089}," 402",[673,3812,844],{"class":750},[673,3814,3815,3817,3819,3821,3824,3826],{"class":675,"line":2279},[673,3816,3632],{"class":829},[673,3818,833],{"class":750},[673,3820,764],{"class":750},[673,3822,3823],{"class":682},"Payment declined",[673,3825,841],{"class":750},[673,3827,844],{"class":750},[673,3829,3830,3832,3834,3837,3840,3842,3844,3846,3848,3850],{"class":675,"line":2290},[673,3831,3648],{"class":829},[673,3833,833],{"class":750},[673,3835,3836],{"class":750}," `",[673,3838,3839],{"class":682},"Card declined by issuer: ",[673,3841,3779],{"class":750},[673,3843,3741],{"class":754},[673,3845,939],{"class":750},[673,3847,3786],{"class":754},[673,3849,3789],{"class":750},[673,3851,844],{"class":750},[673,3853,3854,3856,3858,3860,3863,3865],{"class":675,"line":2310},[673,3855,3664],{"class":829},[673,3857,833],{"class":750},[673,3859,764],{"class":750},[673,3861,3862],{"class":682},"Try a different payment method or contact your bank",[673,3864,841],{"class":750},[673,3866,844],{"class":750},[673,3868,3869,3871],{"class":675,"line":2328},[673,3870,3696],{"class":750},[673,3872,852],{"class":829},[673,3874,3875],{"class":675,"line":2350},[673,3876,1560],{"class":750},[673,3878,3879],{"class":675,"line":2358},[673,3880,777],{"emptyLinePlaceholder":776},[673,3882,3883,3885,3887,3889,3891,3893,3895,3897,3899,3901,3903],{"class":675,"line":2363},[673,3884,969],{"class":746},[673,3886,972],{"class":754},[673,3888,939],{"class":750},[673,3890,977],{"class":817},[673,3892,820],{"class":829},[673,3894,947],{"class":750},[673,3896,3104],{"class":829},[673,3898,833],{"class":750},[673,3900,1193],{"class":1192},[673,3902,758],{"class":750},[673,3904,852],{"class":829},[673,3906,3907,3909],{"class":675,"line":2368},[673,3908,811],{"class":750},[673,3910,852],{"class":754},[587,3912,3913,3915,3916,3919],{},[591,3914,597],{}," catches ",[591,3917,3918],{},"EvlogError"," and returns a structured JSON response (like Nitro does for Nuxt):",[663,3921,3925],{"className":3922,"code":3923,"filename":3924,"language":977,"meta":669,"style":669},"language-json shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","{\n \"name\": \"EvlogError\",\n \"message\": \"Payment declined\",\n \"status\": 402,\n \"data\": {\n \"why\": \"Card declined by issuer: insufficient_funds\",\n \"fix\": \"Try a different payment method or contact your bank\"\n }\n}\n","Response (402)",[591,3926,3927,3931,3953,3972,3987,4000,4020,4037,4041],{"__ignoreMap":669},[673,3928,3929],{"class":675,"line":676},[673,3930,823],{"class":750},[673,3932,3933,3936,3939,3942,3944,3947,3949,3951],{"class":675,"line":773},[673,3934,3935],{"class":750}," \"",[673,3937,3938],{"class":786},"name",[673,3940,3941],{"class":750},"\"",[673,3943,833],{"class":750},[673,3945,3946],{"class":750}," \"",[673,3948,3918],{"class":682},[673,3950,3941],{"class":750},[673,3952,844],{"class":750},[673,3954,3955,3957,3960,3962,3964,3966,3968,3970],{"class":675,"line":780},[673,3956,3935],{"class":750},[673,3958,3959],{"class":786},"message",[673,3961,3941],{"class":750},[673,3963,833],{"class":750},[673,3965,3946],{"class":750},[673,3967,3823],{"class":682},[673,3969,3941],{"class":750},[673,3971,844],{"class":750},[673,3973,3974,3976,3979,3981,3983,3985],{"class":675,"line":826},[673,3975,3935],{"class":750},[673,3977,3978],{"class":786},"status",[673,3980,3941],{"class":750},[673,3982,833],{"class":750},[673,3984,3810],{"class":2089},[673,3986,844],{"class":750},[673,3988,3989,3991,3994,3996,3998],{"class":675,"line":847},[673,3990,3935],{"class":750},[673,3992,3993],{"class":786},"data",[673,3995,3941],{"class":750},[673,3997,833],{"class":750},[673,3999,917],{"class":750},[673,4001,4002,4005,4007,4009,4011,4013,4016,4018],{"class":675,"line":966},[673,4003,4004],{"class":750}," \"",[673,4006,3431],{"class":679},[673,4008,3941],{"class":750},[673,4010,833],{"class":750},[673,4012,3946],{"class":750},[673,4014,4015],{"class":682},"Card declined by issuer: insufficient_funds",[673,4017,3941],{"class":750},[673,4019,844],{"class":750},[673,4021,4022,4024,4026,4028,4030,4032,4034],{"class":675,"line":1000},[673,4023,4004],{"class":750},[673,4025,3434],{"class":679},[673,4027,3941],{"class":750},[673,4029,833],{"class":750},[673,4031,3946],{"class":750},[673,4033,3862],{"class":682},[673,4035,4036],{"class":750},"\"\n",[673,4038,4039],{"class":675,"line":1490},[673,4040,1560],{"class":750},[673,4042,4043],{"class":675,"line":1498},[673,4044,4045],{"class":750},"}\n",[587,4047,4048],{},"In the terminal, the error renders inside the wide event: error block first, then request context. Colors and tree connectors render in the terminal; the example below omits ANSI for readability.",[663,4050,4053],{"className":665,"code":4051,"filename":4052,"language":668,"meta":669,"style":669},"ERROR [app] POST \u002Fapi\u002Fpayment\u002Fprocess 402 in 12ms\n ├─ error: Payment declined\n │ at app\u002Fapi\u002Fpayment\u002Fprocess\u002Froute.ts:336\n │ ❯ 336 ┃ throw createError({ message: 'Payment declined', ... })\n │ Why: Card declined by issuer: insufficient_funds\n │ Fix: Try a different payment method or contact your bank\n │ stack (3 frames hidden in node_modules)\n └─ payment: amount=4999\n","Terminal output",[591,4054,4055,4063,4076,4087,4110,4132,4164,4188],{"__ignoreMap":669},[673,4056,4057,4060],{"class":675,"line":676},[673,4058,4059],{"class":679},"ERROR",[673,4061,4062],{"class":754}," [app] POST \u002Fapi\u002Fpayment\u002Fprocess 402 in 12ms\n",[673,4064,4065,4067,4070,4073],{"class":675,"line":773},[673,4066,3157],{"class":679},[673,4068,4069],{"class":682}," error:",[673,4071,4072],{"class":682}," Payment",[673,4074,4075],{"class":682}," declined\n",[673,4077,4078,4081,4084],{"class":675,"line":780},[673,4079,4080],{"class":679}," │",[673,4082,4083],{"class":682}," at",[673,4085,4086],{"class":682}," app\u002Fapi\u002Fpayment\u002Fprocess\u002Froute.ts:336\n",[673,4088,4089,4091,4094,4097,4100,4103,4105,4107],{"class":675,"line":826},[673,4090,4080],{"class":679},[673,4092,4093],{"class":682}," ❯",[673,4095,4096],{"class":2089}," 336",[673,4098,4099],{"class":682}," ┃",[673,4101,4102],{"class":682}," throw",[673,4104,3464],{"class":682},[673,4106,820],{"class":750},[673,4108,4109],{"class":754},"{ message: 'Payment declined', ... })\n",[673,4111,4112,4114,4117,4120,4123,4126,4129],{"class":675,"line":847},[673,4113,4080],{"class":679},[673,4115,4116],{"class":682}," Why:",[673,4118,4119],{"class":682}," Card",[673,4121,4122],{"class":682}," declined",[673,4124,4125],{"class":682}," by",[673,4127,4128],{"class":682}," issuer:",[673,4130,4131],{"class":682}," insufficient_funds\n",[673,4133,4134,4136,4139,4142,4145,4148,4150,4152,4155,4158,4161],{"class":675,"line":966},[673,4135,4080],{"class":679},[673,4137,4138],{"class":682}," Fix:",[673,4140,4141],{"class":682}," Try",[673,4143,4144],{"class":682}," a",[673,4146,4147],{"class":682}," different",[673,4149,3014],{"class":682},[673,4151,3052],{"class":682},[673,4153,4154],{"class":682}," or",[673,4156,4157],{"class":682}," contact",[673,4159,4160],{"class":682}," your",[673,4162,4163],{"class":682}," bank\n",[673,4165,4166,4168,4171,4174,4177,4180,4183,4186],{"class":675,"line":1000},[673,4167,4080],{"class":679},[673,4169,4170],{"class":682}," stack",[673,4172,4173],{"class":754}," (3 ",[673,4175,4176],{"class":682},"frames",[673,4178,4179],{"class":682}," hidden",[673,4181,4182],{"class":682}," in",[673,4184,4185],{"class":682}," node_modules",[673,4187,852],{"class":750},[673,4189,4190,4192,4194,4197],{"class":675,"line":1490},[673,4191,3209],{"class":679},[673,4193,3195],{"class":682},[673,4195,4196],{"class":682}," amount=",[673,4198,4199],{"class":2089},"4999\n",[655,4201,4203],{"id":4202},"parsing-errors-on-the-client","Parsing Errors on the Client",[587,4205,3424,4206,4209,4210,4212,4213,4216],{},[591,4207,4208],{},"parseError"," to extract the structured fields from any error, whether it's a fetch response, an ",[591,4211,3918],{},", or a plain ",[591,4214,4215],{},"Error"," object:",[663,4218,4223],{"className":4219,"code":4220,"filename":4221,"language":4222,"meta":669,"style":669},"language-tsx shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","'use client'\nimport { parseError } from 'evlog'\n\nasync function handleSubmit(formData: FormData) {\n try {\n const res = await fetch('\u002Fapi\u002Fpayment\u002Fprocess', {\n method: 'POST',\n body: JSON.stringify({ amount: Number(formData.get('amount')) }),\n })\n if (!res.ok) throw { data: await res.json(), status: res.status }\n } catch (error) {\n const { message, status, why, fix, link } = parseError(error)\n \u002F\u002F message: \"Payment declined\"\n \u002F\u002F why: \"Card declined by issuer: insufficient_funds\"\n \u002F\u002F fix: \"Try a different payment method or contact your bank\"\n }\n}\n","app\u002Fcomponents\u002FPaymentForm.tsx","tsx",[591,4224,4225,4234,4253,4257,4281,4288,4315,4331,4382,4388,4441,4456,4495,4500,4505,4510,4514],{"__ignoreMap":669},[673,4226,4227,4229,4232],{"class":675,"line":676},[673,4228,841],{"class":750},[673,4230,4231],{"class":682},"use client",[673,4233,770],{"class":750},[673,4235,4236,4238,4240,4243,4245,4247,4249,4251],{"class":675,"line":773},[673,4237,747],{"class":746},[673,4239,751],{"class":750},[673,4241,4242],{"class":754}," parseError",[673,4244,758],{"class":750},[673,4246,761],{"class":746},[673,4248,764],{"class":750},[673,4250,1923],{"class":682},[673,4252,770],{"class":750},[673,4254,4255],{"class":675,"line":780},[673,4256,777],{"emptyLinePlaceholder":776},[673,4258,4259,4261,4264,4267,4269,4272,4274,4277,4279],{"class":675,"line":826},[673,4260,908],{"class":786},[673,4262,4263],{"class":786}," function",[673,4265,4266],{"class":817}," handleSubmit",[673,4268,820],{"class":750},[673,4270,4271],{"class":2494},"formData",[673,4273,833],{"class":750},[673,4275,4276],{"class":679}," FormData",[673,4278,2498],{"class":750},[673,4280,917],{"class":750},[673,4282,4283,4286],{"class":675,"line":847},[673,4284,4285],{"class":746}," try",[673,4287,917],{"class":750},[673,4289,4290,4292,4295,4297,4299,4302,4304,4306,4309,4311,4313],{"class":675,"line":966},[673,4291,2508],{"class":786},[673,4293,4294],{"class":754}," res",[673,4296,814],{"class":750},[673,4298,1414],{"class":746},[673,4300,4301],{"class":817}," fetch",[673,4303,820],{"class":829},[673,4305,841],{"class":750},[673,4307,4308],{"class":682},"\u002Fapi\u002Fpayment\u002Fprocess",[673,4310,841],{"class":750},[673,4312,795],{"class":750},[673,4314,917],{"class":750},[673,4316,4317,4320,4322,4324,4327,4329],{"class":675,"line":1000},[673,4318,4319],{"class":829}," method",[673,4321,833],{"class":750},[673,4323,764],{"class":750},[673,4325,4326],{"class":682},"POST",[673,4328,841],{"class":750},[673,4330,844],{"class":750},[673,4332,4333,4336,4338,4341,4343,4345,4347,4349,4351,4353,4356,4358,4360,4362,4365,4367,4369,4371,4373,4376,4378,4380],{"class":675,"line":1490},[673,4334,4335],{"class":829}," body",[673,4337,833],{"class":750},[673,4339,4340],{"class":754}," JSON",[673,4342,939],{"class":750},[673,4344,1685],{"class":817},[673,4346,820],{"class":829},[673,4348,947],{"class":750},[673,4350,3563],{"class":829},[673,4352,833],{"class":750},[673,4354,4355],{"class":817}," Number",[673,4357,820],{"class":829},[673,4359,4271],{"class":754},[673,4361,939],{"class":750},[673,4363,4364],{"class":817},"get",[673,4366,820],{"class":829},[673,4368,841],{"class":750},[673,4370,3572],{"class":682},[673,4372,841],{"class":750},[673,4374,4375],{"class":829},")) ",[673,4377,811],{"class":750},[673,4379,2498],{"class":829},[673,4381,844],{"class":750},[673,4383,4384,4386],{"class":675,"line":1498},[673,4385,3696],{"class":750},[673,4387,852],{"class":829},[673,4389,4390,4392,4394,4396,4399,4401,4404,4406,4409,4411,4414,4416,4418,4420,4422,4424,4426,4428,4430,4432,4434,4436,4438],{"class":675,"line":1503},[673,4391,2554],{"class":746},[673,4393,2491],{"class":829},[673,4395,3318],{"class":750},[673,4397,4398],{"class":754},"res",[673,4400,939],{"class":750},[673,4402,4403],{"class":754},"ok",[673,4405,2567],{"class":829},[673,4407,4408],{"class":746},"throw",[673,4410,751],{"class":750},[673,4412,4413],{"class":829}," data",[673,4415,833],{"class":750},[673,4417,1414],{"class":746},[673,4419,4294],{"class":754},[673,4421,939],{"class":750},[673,4423,977],{"class":817},[673,4425,1305],{"class":829},[673,4427,795],{"class":750},[673,4429,2296],{"class":829},[673,4431,833],{"class":750},[673,4433,4294],{"class":754},[673,4435,939],{"class":750},[673,4437,3978],{"class":754},[673,4439,4440],{"class":750}," }\n",[673,4442,4443,4445,4448,4450,4452,4454],{"class":675,"line":1510},[673,4444,1493],{"class":750},[673,4446,4447],{"class":746}," catch",[673,4449,2491],{"class":829},[673,4451,3760],{"class":754},[673,4453,2567],{"class":829},[673,4455,823],{"class":750},[673,4457,4458,4460,4462,4464,4466,4468,4470,4473,4475,4478,4480,4483,4485,4487,4489,4491,4493],{"class":675,"line":1522},[673,4459,2508],{"class":786},[673,4461,751],{"class":750},[673,4463,984],{"class":754},[673,4465,795],{"class":750},[673,4467,2296],{"class":754},[673,4469,795],{"class":750},[673,4471,4472],{"class":754}," why",[673,4474,795],{"class":750},[673,4476,4477],{"class":754}," fix",[673,4479,795],{"class":750},[673,4481,4482],{"class":754}," link",[673,4484,758],{"class":750},[673,4486,814],{"class":750},[673,4488,4242],{"class":817},[673,4490,820],{"class":829},[673,4492,3760],{"class":754},[673,4494,852],{"class":829},[673,4496,4497],{"class":675,"line":1532},[673,4498,4499],{"class":1535}," \u002F\u002F message: \"Payment declined\"\n",[673,4501,4502],{"class":675,"line":1539},[673,4503,4504],{"class":1535}," \u002F\u002F why: \"Card declined by issuer: insufficient_funds\"\n",[673,4506,4507],{"class":675,"line":1545},[673,4508,4509],{"class":1535}," \u002F\u002F fix: \"Try a different payment method or contact your bank\"\n",[673,4511,4512],{"class":675,"line":1557},[673,4513,1560],{"class":750},[673,4515,4516],{"class":675,"line":1563},[673,4517,4045],{"class":750},[587,4519,4520,4522,4523,4526,4527,4530],{},[591,4521,4208],{}," normalizes any error shape into a flat ",[591,4524,4525],{},"{ message, status, why?, fix?, link? }"," object, so your UI code never has to dig through nested ",[591,4528,4529],{},"data.data"," or check for different error formats.",[651,4532,526],{"id":4533},"configuration-1",[1025,4535,4536,4537,4540,4541,1609,4543,1609,4545,1609,4547,4549],{"color":1027,"icon":84},"See the ",[640,4538,4539],{"href":527},"Configuration reference"," for the full list of shared options (",[591,4542,1668],{},[591,4544,1677],{},[591,4546,1645],{},[591,4548,1682],{},", middleware options, etc.).",[587,4551,4552,4553,4555],{},"The ",[591,4554,593],{}," factory accepts the following options:",[1690,4557,4558,4570],{},[1693,4559,4560],{},[1696,4561,4562,4564,4566,4568],{},[1699,4563,1701],{},[1699,4565,1704],{},[1699,4567,1707],{},[1699,4569,1710],{},[1712,4571,4572,4591,4608,4628,4646,4665,4684,4703,4722,4740],{},[1696,4573,4574,4578,4583,4588],{},[1717,4575,4576],{},[591,4577,1671],{},[1717,4579,4580],{},[591,4581,4582],{},"string",[1717,4584,4585],{},[591,4586,4587],{},"'app'",[1717,4589,4590],{},"Service name shown in logs",[1696,4592,4593,4598,4602,4605],{},[1717,4594,4595],{},[591,4596,4597],{},"environment",[1717,4599,4600],{},[591,4601,4582],{},[1717,4603,4604],{},"Auto-detected",[1717,4606,4607],{},"Environment name",[1696,4609,4610,4615,4620,4625],{},[1717,4611,4612],{},[591,4613,4614],{},"include",[1717,4616,4617],{},[591,4618,4619],{},"string[]",[1717,4621,4622],{},[591,4623,4624],{},"undefined",[1717,4626,4627],{},"Route patterns to log",[1696,4629,4630,4635,4639,4643],{},[1717,4631,4632],{},[591,4633,4634],{},"exclude",[1717,4636,4637],{},[591,4638,4619],{},[1717,4640,4641],{},[591,4642,4624],{},[1717,4644,4645],{},"Route patterns to exclude",[1696,4647,4648,4653,4658,4662],{},[1717,4649,4650],{},[591,4651,4652],{},"routes",[1717,4654,4655],{},[591,4656,4657],{},"Record\u003Cstring, RouteConfig>",[1717,4659,4660],{},[591,4661,4624],{},[1717,4663,4664],{},"Route-specific service configuration",[1696,4666,4667,4672,4677,4681],{},[1717,4668,4669],{},[591,4670,4671],{},"sampling.rates",[1717,4673,4674],{},[591,4675,4676],{},"object",[1717,4678,4679],{},[591,4680,4624],{},[1717,4682,4683],{},"Head sampling rates per log level",[1696,4685,4686,4691,4696,4700],{},[1717,4687,4688],{},[591,4689,4690],{},"sampling.keep",[1717,4692,4693],{},[591,4694,4695],{},"array",[1717,4697,4698],{},[591,4699,4624],{},[1717,4701,4702],{},"Tail sampling conditions",[1696,4704,4705,4710,4715,4719],{},[1717,4706,4707],{},[591,4708,4709],{},"keep",[1717,4711,4712],{},[591,4713,4714],{},"(ctx: TailSamplingContext) => void",[1717,4716,4717],{},[591,4718,4624],{},[1717,4720,4721],{},"Custom tail sampling callback",[1696,4723,4724,4728,4733,4737],{},[1717,4725,4726],{},[591,4727,1069],{},[1717,4729,4730],{},[591,4731,4732],{},"DrainFunction",[1717,4734,4735],{},[591,4736,4624],{},[1717,4738,4739],{},"Drain adapter for external services",[1696,4741,4742,4747,4752,4756],{},[1717,4743,4744],{},[591,4745,4746],{},"enrich",[1717,4748,4749],{},[591,4750,4751],{},"(ctx: EnrichContext) => void",[1717,4753,4754],{},[591,4755,4624],{},[1717,4757,4758],{},"Event enrichment callback",[651,4760,4762],{"id":4761},"tail-sampling","Tail Sampling",[587,4764,4765],{},"Combine rule-based and custom tail sampling to always capture what matters, even when head sampling drops most logs:",[663,4767,4769],{"className":736,"code":4768,"filename":738,"language":739,"meta":669,"style":669},"export const { withEvlog, useLogger } = createEvlog({\n service: 'my-app',\n sampling: {\n rates: { info: 10 }, \u002F\u002F Only keep 10% of info logs\n keep: [\n { status: 400 }, \u002F\u002F Always keep 4xx\u002F5xx\n { duration: 1000 }, \u002F\u002F Always keep slow requests\n { path: '\u002Fapi\u002Fcritical\u002F**' }, \u002F\u002F Always keep critical paths\n ],\n },\n \u002F\u002F Custom: always keep premium user requests\n keep: (ctx) => {\n const user = ctx.context.user as { premium?: boolean } | undefined\n if (user?.premium) ctx.shouldKeep = true\n },\n})\n",[591,4770,4771,4796,4810,4818,4837,4845,4860,4874,4892,4898,4902,4907,4923,4957,4981,4985],{"__ignoreMap":669},[673,4772,4773,4775,4777,4779,4781,4783,4786,4788,4790,4792,4794],{"class":675,"line":676},[673,4774,783],{"class":746},[673,4776,787],{"class":786},[673,4778,751],{"class":750},[673,4780,792],{"class":754},[673,4782,795],{"class":750},[673,4784,4785],{"class":754}," useLogger ",[673,4787,811],{"class":750},[673,4789,814],{"class":750},[673,4791,755],{"class":817},[673,4793,820],{"class":754},[673,4795,823],{"class":750},[673,4797,4798,4800,4802,4804,4806,4808],{"class":675,"line":773},[673,4799,830],{"class":829},[673,4801,833],{"class":750},[673,4803,764],{"class":750},[673,4805,838],{"class":682},[673,4807,841],{"class":750},[673,4809,844],{"class":750},[673,4811,4812,4814,4816],{"class":675,"line":780},[673,4813,2251],{"class":829},[673,4815,833],{"class":750},[673,4817,917],{"class":750},[673,4819,4820,4822,4824,4826,4828,4830,4832,4834],{"class":675,"line":826},[673,4821,2261],{"class":829},[673,4823,833],{"class":750},[673,4825,751],{"class":750},[673,4827,2268],{"class":829},[673,4829,833],{"class":750},[673,4831,2273],{"class":2089},[673,4833,2304],{"class":750},[673,4835,4836],{"class":1535}," \u002F\u002F Only keep 10% of info logs\n",[673,4838,4839,4841,4843],{"class":675,"line":847},[673,4840,2282],{"class":829},[673,4842,833],{"class":750},[673,4844,2287],{"class":754},[673,4846,4847,4849,4851,4853,4855,4857],{"class":675,"line":966},[673,4848,2293],{"class":750},[673,4850,2296],{"class":829},[673,4852,833],{"class":750},[673,4854,2301],{"class":2089},[673,4856,2304],{"class":750},[673,4858,4859],{"class":1535}," \u002F\u002F Always keep 4xx\u002F5xx\n",[673,4861,4862,4864,4866,4868,4870,4872],{"class":675,"line":1000},[673,4863,2293],{"class":750},[673,4865,2315],{"class":829},[673,4867,833],{"class":750},[673,4869,2320],{"class":2089},[673,4871,2304],{"class":750},[673,4873,2325],{"class":1535},[673,4875,4876,4878,4880,4882,4884,4886,4888,4890],{"class":675,"line":1490},[673,4877,2293],{"class":750},[673,4879,2333],{"class":829},[673,4881,833],{"class":750},[673,4883,764],{"class":750},[673,4885,2340],{"class":682},[673,4887,841],{"class":750},[673,4889,2304],{"class":750},[673,4891,2347],{"class":1535},[673,4893,4894,4896],{"class":675,"line":1498},[673,4895,2353],{"class":754},[673,4897,844],{"class":750},[673,4899,4900],{"class":675,"line":1503},[673,4901,1878],{"class":750},[673,4903,4904],{"class":675,"line":1510},[673,4905,4906],{"class":1535}," \u002F\u002F Custom: always keep premium user requests\n",[673,4908,4909,4911,4913,4915,4917,4919,4921],{"class":675,"line":1522},[673,4910,2486],{"class":817},[673,4912,833],{"class":750},[673,4914,2491],{"class":750},[673,4916,2495],{"class":2494},[673,4918,2498],{"class":750},[673,4920,914],{"class":786},[673,4922,917],{"class":750},[673,4924,4925,4927,4929,4931,4933,4935,4937,4939,4941,4943,4945,4947,4949,4951,4953,4955],{"class":675,"line":1532},[673,4926,2508],{"class":786},[673,4928,2511],{"class":754},[673,4930,814],{"class":750},[673,4932,2516],{"class":754},[673,4934,939],{"class":750},[673,4936,2521],{"class":754},[673,4938,939],{"class":750},[673,4940,2526],{"class":754},[673,4942,2529],{"class":746},[673,4944,751],{"class":750},[673,4946,2534],{"class":829},[673,4948,2537],{"class":750},[673,4950,2540],{"class":679},[673,4952,758],{"class":750},[673,4954,2545],{"class":750},[673,4956,2548],{"class":679},[673,4958,4959,4961,4963,4965,4967,4969,4971,4973,4975,4977,4979],{"class":675,"line":1539},[673,4960,2554],{"class":746},[673,4962,2491],{"class":829},[673,4964,2526],{"class":754},[673,4966,2561],{"class":750},[673,4968,2564],{"class":754},[673,4970,2567],{"class":829},[673,4972,2495],{"class":754},[673,4974,939],{"class":750},[673,4976,2574],{"class":754},[673,4978,814],{"class":750},[673,4980,2579],{"class":1192},[673,4982,4983],{"class":675,"line":1545},[673,4984,1878],{"class":750},[673,4986,4987,4989],{"class":675,"line":1557},[673,4988,811],{"class":750},[673,4990,852],{"class":754},[587,4992,4552,4993,4995],{},[591,4994,4709],{}," rules use OR logic: any match forces the event through regardless of head sampling.",[651,4997,374],{"id":4998},"middleware",[587,5000,5001,5002,1596,5005,5008,5009,5011],{},"Set ",[591,5003,5004],{},"x-request-id",[591,5006,5007],{},"x-evlog-start"," headers so ",[591,5010,597],{}," can correlate timing across the middleware -> handler chain:",[663,5013,5016],{"className":736,"code":5014,"filename":5015,"language":739,"meta":669,"style":669},"import { evlogMiddleware } from 'evlog\u002Fnext'\n\nexport const proxy = evlogMiddleware()\n\nexport const config = {\n matcher: ['\u002Fapi\u002F:path*'],\n}\n","proxy.ts",[591,5017,5018,5037,5041,5056,5060,5073,5093],{"__ignoreMap":669},[673,5019,5020,5022,5024,5027,5029,5031,5033,5035],{"class":675,"line":676},[673,5021,747],{"class":746},[673,5023,751],{"class":750},[673,5025,5026],{"class":754}," evlogMiddleware",[673,5028,758],{"class":750},[673,5030,761],{"class":746},[673,5032,764],{"class":750},[673,5034,767],{"class":682},[673,5036,770],{"class":750},[673,5038,5039],{"class":675,"line":773},[673,5040,777],{"emptyLinePlaceholder":776},[673,5042,5043,5045,5047,5050,5052,5054],{"class":675,"line":780},[673,5044,783],{"class":746},[673,5046,787],{"class":786},[673,5048,5049],{"class":754}," proxy ",[673,5051,901],{"class":750},[673,5053,5026],{"class":817},[673,5055,931],{"class":754},[673,5057,5058],{"class":675,"line":826},[673,5059,777],{"emptyLinePlaceholder":776},[673,5061,5062,5064,5066,5069,5071],{"class":675,"line":847},[673,5063,783],{"class":746},[673,5065,787],{"class":786},[673,5067,5068],{"class":754}," config ",[673,5070,901],{"class":750},[673,5072,917],{"class":750},[673,5074,5075,5078,5080,5082,5084,5087,5089,5091],{"class":675,"line":966},[673,5076,5077],{"class":829}," matcher",[673,5079,833],{"class":750},[673,5081,1851],{"class":754},[673,5083,841],{"class":750},[673,5085,5086],{"class":682},"\u002Fapi\u002F:path*",[673,5088,841],{"class":750},[673,5090,1871],{"class":754},[673,5092,844],{"class":750},[673,5094,5095],{"class":675,"line":1000},[673,5096,4045],{"class":750},[1025,5098,5099,5100,5103,5104,5106,5107,5109],{"color":1027,"icon":13},"Older versions of Next.js use ",[591,5101,5102],{},"middleware.ts"," instead of ",[591,5105,5015],{},". The evlog middleware works with both, so just import from ",[591,5108,767],{}," regardless.",[651,5111,5113],{"id":5112},"server-actions","Server Actions",[587,5115,5116,5118],{},[591,5117,597],{}," also works with Server Actions. Wrap your action to get full request-scoped logging:",[663,5120,5123],{"className":736,"code":5121,"filename":5122,"language":739,"meta":669,"style":669},"'use server'\nimport { withEvlog, useLogger } from '@\u002Flib\u002Fevlog'\n\nexport const checkout = withEvlog(async (formData: FormData) => {\n const log = useLogger()\n log.set({ action: 'checkout', cartId: formData.get('cartId') })\n \u002F\u002F ...\n})\n","app\u002Factions\u002Fcheckout.ts",[591,5124,5125,5134,5156,5160,5191,5203,5255,5260],{"__ignoreMap":669},[673,5126,5127,5129,5132],{"class":675,"line":676},[673,5128,841],{"class":750},[673,5130,5131],{"class":682},"use server",[673,5133,770],{"class":750},[673,5135,5136,5138,5140,5142,5144,5146,5148,5150,5152,5154],{"class":675,"line":773},[673,5137,747],{"class":746},[673,5139,751],{"class":750},[673,5141,792],{"class":754},[673,5143,795],{"class":750},[673,5145,798],{"class":754},[673,5147,758],{"class":750},[673,5149,761],{"class":746},[673,5151,764],{"class":750},[673,5153,883],{"class":682},[673,5155,770],{"class":750},[673,5157,5158],{"class":675,"line":780},[673,5159,777],{"emptyLinePlaceholder":776},[673,5161,5162,5164,5166,5169,5171,5173,5175,5177,5179,5181,5183,5185,5187,5189],{"class":675,"line":826},[673,5163,783],{"class":746},[673,5165,787],{"class":786},[673,5167,5168],{"class":754}," checkout ",[673,5170,901],{"class":750},[673,5172,792],{"class":817},[673,5174,820],{"class":754},[673,5176,908],{"class":786},[673,5178,2491],{"class":750},[673,5180,4271],{"class":2494},[673,5182,833],{"class":750},[673,5184,4276],{"class":679},[673,5186,2498],{"class":750},[673,5188,914],{"class":786},[673,5190,917],{"class":750},[673,5192,5193,5195,5197,5199,5201],{"class":675,"line":847},[673,5194,922],{"class":786},[673,5196,803],{"class":754},[673,5198,814],{"class":750},[673,5200,798],{"class":817},[673,5202,931],{"class":829},[673,5204,5205,5207,5209,5211,5213,5215,5217,5219,5221,5224,5226,5228,5231,5233,5236,5238,5240,5242,5244,5247,5249,5251,5253],{"class":675,"line":966},[673,5206,936],{"class":754},[673,5208,939],{"class":750},[673,5210,942],{"class":817},[673,5212,820],{"class":829},[673,5214,947],{"class":750},[673,5216,950],{"class":829},[673,5218,833],{"class":750},[673,5220,764],{"class":750},[673,5222,5223],{"class":682},"checkout",[673,5225,841],{"class":750},[673,5227,795],{"class":750},[673,5229,5230],{"class":829}," cartId",[673,5232,833],{"class":750},[673,5234,5235],{"class":754}," formData",[673,5237,939],{"class":750},[673,5239,4364],{"class":817},[673,5241,820],{"class":829},[673,5243,841],{"class":750},[673,5245,5246],{"class":682},"cartId",[673,5248,841],{"class":750},[673,5250,2567],{"class":829},[673,5252,811],{"class":750},[673,5254,852],{"class":829},[673,5256,5257],{"class":675,"line":1000},[673,5258,5259],{"class":1535}," \u002F\u002F ...\n",[673,5261,5262,5264],{"class":675,"line":1490},[673,5263,811],{"class":750},[673,5265,852],{"class":754},[651,5267,5269],{"id":5268},"client-provider","Client Provider",[587,5271,5272,5273,5276],{},"Wrap your root layout with ",[591,5274,5275],{},"EvlogProvider"," to enable client-side logging and its drain:",[663,5278,5281],{"className":4219,"code":5279,"filename":5280,"language":4222,"meta":669,"style":669},"import { EvlogProvider } from 'evlog\u002Fnext\u002Fclient'\n\nexport default function Layout({ children }: { children: React.ReactNode }) {\n return (\n \u003Chtml lang=\"en\">\n \u003Cbody>\n \u003CEvlogProvider service=\"my-app\" transport={{ enabled: true }}>\n {children}\n \u003C\u002FEvlogProvider>\n \u003C\u002Fbody>\n \u003C\u002Fhtml>\n )\n}\n","app\u002Flayout.tsx",[591,5282,5283,5303,5307,5347,5354,5377,5386,5419,5429,5438,5447,5456,5461],{"__ignoreMap":669},[673,5284,5285,5287,5289,5292,5294,5296,5298,5301],{"class":675,"line":676},[673,5286,747],{"class":746},[673,5288,751],{"class":750},[673,5290,5291],{"class":754}," EvlogProvider",[673,5293,758],{"class":750},[673,5295,761],{"class":746},[673,5297,764],{"class":750},[673,5299,5300],{"class":682},"evlog\u002Fnext\u002Fclient",[673,5302,770],{"class":750},[673,5304,5305],{"class":675,"line":773},[673,5306,777],{"emptyLinePlaceholder":776},[673,5308,5309,5311,5314,5316,5319,5322,5325,5328,5330,5332,5334,5337,5339,5342,5345],{"class":675,"line":780},[673,5310,783],{"class":746},[673,5312,5313],{"class":746}," default",[673,5315,4263],{"class":786},[673,5317,5318],{"class":817}," Layout",[673,5320,5321],{"class":750},"({",[673,5323,5324],{"class":2494}," children",[673,5326,5327],{"class":750}," }:",[673,5329,751],{"class":750},[673,5331,5324],{"class":829},[673,5333,833],{"class":750},[673,5335,5336],{"class":679}," React",[673,5338,939],{"class":750},[673,5340,5341],{"class":679},"ReactNode",[673,5343,5344],{"class":750}," })",[673,5346,917],{"class":750},[673,5348,5349,5351],{"class":675,"line":826},[673,5350,969],{"class":746},[673,5352,5353],{"class":829}," (\n",[673,5355,5356,5359,5362,5365,5367,5369,5372,5374],{"class":675,"line":847},[673,5357,5358],{"class":750}," \u003C",[673,5360,5361],{"class":829},"html",[673,5363,5364],{"class":786}," lang",[673,5366,901],{"class":750},[673,5368,3941],{"class":750},[673,5370,5371],{"class":682},"en",[673,5373,3941],{"class":750},[673,5375,5376],{"class":750},">\n",[673,5378,5379,5382,5384],{"class":675,"line":966},[673,5380,5381],{"class":750}," \u003C",[673,5383,3026],{"class":829},[673,5385,5376],{"class":750},[673,5387,5388,5391,5393,5395,5397,5399,5401,5403,5406,5409,5412,5414,5416],{"class":675,"line":1000},[673,5389,5390],{"class":750}," \u003C",[673,5392,5275],{"class":679},[673,5394,2399],{"class":786},[673,5396,901],{"class":750},[673,5398,3941],{"class":750},[673,5400,838],{"class":682},[673,5402,3941],{"class":750},[673,5404,5405],{"class":786}," transport",[673,5407,5408],{"class":750},"={{",[673,5410,5411],{"class":829}," enabled",[673,5413,833],{"class":750},[673,5415,1193],{"class":1192},[673,5417,5418],{"class":750}," }}>\n",[673,5420,5421,5424,5427],{"class":675,"line":1490},[673,5422,5423],{"class":750}," {",[673,5425,5426],{"class":754},"children",[673,5428,4045],{"class":750},[673,5430,5431,5434,5436],{"class":675,"line":1498},[673,5432,5433],{"class":750}," \u003C\u002F",[673,5435,5275],{"class":679},[673,5437,5376],{"class":750},[673,5439,5440,5443,5445],{"class":675,"line":1503},[673,5441,5442],{"class":750}," \u003C\u002F",[673,5444,3026],{"class":829},[673,5446,5376],{"class":750},[673,5448,5449,5452,5454],{"class":675,"line":1510},[673,5450,5451],{"class":750}," \u003C\u002F",[673,5453,5361],{"class":829},[673,5455,5376],{"class":750},[673,5457,5458],{"class":675,"line":1522},[673,5459,5460],{"class":829}," )\n",[673,5462,5463],{"class":675,"line":1532},[673,5464,4045],{"class":750},[651,5466,327],{"id":5467},"client-logging",[587,5469,3424,5470,5473],{},[591,5471,5472],{},"log"," in any client component. Identity is preserved across all logs and transported to the server:",[663,5475,5478],{"className":4219,"code":5476,"filename":5477,"language":4222,"meta":669,"style":669},"'use client'\nimport { log, setIdentity, clearIdentity } from 'evlog\u002Fnext\u002Fclient'\n\nexport function Dashboard({ user }: { user: { id: string } }) {\n \u002F\u002F Set identity once - all subsequent logs include it\n useEffect(() => {\n setIdentity({ userId: user.id })\n return () => clearIdentity()\n }, [user.id])\n\n return (\n \u003Cbutton onClick={() => log.info({ action: 'export_clicked', format: 'csv' })}>\n Export\n \u003C\u002Fbutton>\n )\n}\n","app\u002Fcomponents\u002FDashboard.tsx",[591,5479,5480,5488,5516,5520,5556,5561,5574,5599,5612,5628,5632,5638,5695,5700,5708,5712],{"__ignoreMap":669},[673,5481,5482,5484,5486],{"class":675,"line":676},[673,5483,841],{"class":750},[673,5485,4231],{"class":682},[673,5487,770],{"class":750},[673,5489,5490,5492,5494,5496,5498,5501,5503,5506,5508,5510,5512,5514],{"class":675,"line":773},[673,5491,747],{"class":746},[673,5493,751],{"class":750},[673,5495,803],{"class":754},[673,5497,795],{"class":750},[673,5499,5500],{"class":754}," setIdentity",[673,5502,795],{"class":750},[673,5504,5505],{"class":754}," clearIdentity",[673,5507,758],{"class":750},[673,5509,761],{"class":746},[673,5511,764],{"class":750},[673,5513,5300],{"class":682},[673,5515,770],{"class":750},[673,5517,5518],{"class":675,"line":780},[673,5519,777],{"emptyLinePlaceholder":776},[673,5521,5522,5524,5526,5529,5531,5533,5535,5537,5539,5541,5543,5545,5547,5550,5552,5554],{"class":675,"line":826},[673,5523,783],{"class":746},[673,5525,4263],{"class":786},[673,5527,5528],{"class":817}," Dashboard",[673,5530,5321],{"class":750},[673,5532,2511],{"class":2494},[673,5534,5327],{"class":750},[673,5536,751],{"class":750},[673,5538,2511],{"class":829},[673,5540,833],{"class":750},[673,5542,751],{"class":750},[673,5544,2884],{"class":829},[673,5546,833],{"class":750},[673,5548,5549],{"class":679}," string",[673,5551,758],{"class":750},[673,5553,5344],{"class":750},[673,5555,917],{"class":750},[673,5557,5558],{"class":675,"line":847},[673,5559,5560],{"class":1535}," \u002F\u002F Set identity once - all subsequent logs include it\n",[673,5562,5563,5566,5568,5570,5572],{"class":675,"line":966},[673,5564,5565],{"class":817}," useEffect",[673,5567,820],{"class":829},[673,5569,1305],{"class":750},[673,5571,914],{"class":786},[673,5573,917],{"class":750},[673,5575,5576,5579,5581,5583,5586,5588,5590,5592,5595,5597],{"class":675,"line":1000},[673,5577,5578],{"class":817}," setIdentity",[673,5580,820],{"class":829},[673,5582,947],{"class":750},[673,5584,5585],{"class":829}," userId",[673,5587,833],{"class":750},[673,5589,2511],{"class":754},[673,5591,939],{"class":750},[673,5593,5594],{"class":754},"id",[673,5596,758],{"class":750},[673,5598,852],{"class":829},[673,5600,5601,5604,5606,5608,5610],{"class":675,"line":1490},[673,5602,5603],{"class":746}," return",[673,5605,911],{"class":750},[673,5607,914],{"class":786},[673,5609,5505],{"class":817},[673,5611,931],{"class":829},[673,5613,5614,5617,5619,5621,5623,5625],{"class":675,"line":1498},[673,5615,5616],{"class":750}," },",[673,5618,1851],{"class":829},[673,5620,2526],{"class":754},[673,5622,939],{"class":750},[673,5624,5594],{"class":754},[673,5626,5627],{"class":829},"])\n",[673,5629,5630],{"class":675,"line":1503},[673,5631,777],{"emptyLinePlaceholder":776},[673,5633,5634,5636],{"class":675,"line":1510},[673,5635,969],{"class":746},[673,5637,5353],{"class":829},[673,5639,5640,5642,5645,5648,5651,5653,5655,5657,5659,5661,5663,5665,5667,5669,5672,5674,5676,5679,5681,5683,5686,5688,5690,5692],{"class":675,"line":1522},[673,5641,5358],{"class":750},[673,5643,5644],{"class":829},"button",[673,5646,5647],{"class":786}," onClick",[673,5649,5650],{"class":750},"={()",[673,5652,914],{"class":786},[673,5654,803],{"class":754},[673,5656,939],{"class":750},[673,5658,1027],{"class":817},[673,5660,820],{"class":754},[673,5662,947],{"class":750},[673,5664,950],{"class":829},[673,5666,833],{"class":750},[673,5668,764],{"class":750},[673,5670,5671],{"class":682},"export_clicked",[673,5673,841],{"class":750},[673,5675,795],{"class":750},[673,5677,5678],{"class":829}," format",[673,5680,833],{"class":750},[673,5682,764],{"class":750},[673,5684,5685],{"class":682},"csv",[673,5687,841],{"class":750},[673,5689,758],{"class":750},[673,5691,2498],{"class":754},[673,5693,5694],{"class":750},"}>\n",[673,5696,5697],{"class":675,"line":1532},[673,5698,5699],{"class":754}," Export\n",[673,5701,5702,5704,5706],{"class":675,"line":1539},[673,5703,5451],{"class":750},[673,5705,5644],{"class":829},[673,5707,5376],{"class":750},[673,5709,5710],{"class":675,"line":1545},[673,5711,5460],{"class":829},[673,5713,5714],{"class":675,"line":1557},[673,5715,4045],{"class":750},[651,5717,5719],{"id":5718},"http-drain","HTTP drain",[587,5721,5722,5723,5725],{},"For advanced use cases, send structured ",[591,5724,2067],{}," events directly from the browser to a custom endpoint:",[663,5727,5730],{"className":736,"code":5728,"filename":5729,"language":739,"meta":669,"style":669},"import { createHttpLogDrain } from 'evlog\u002Fhttp'\n\nconst drain = createHttpLogDrain({\n drain: { endpoint: '\u002Fapi\u002Fevlog\u002Fhttp-ingest' },\n pipeline: { batch: { size: 10, intervalMs: 5000 } },\n})\n\ndrain(drainEvent)\nawait drain.flush()\n","lib\u002Fhttp-drain.ts",[591,5731,5732,5752,5756,5770,5792,5825,5831,5835,5842],{"__ignoreMap":669},[673,5733,5734,5736,5738,5741,5743,5745,5747,5750],{"class":675,"line":676},[673,5735,747],{"class":746},[673,5737,751],{"class":750},[673,5739,5740],{"class":754}," createHttpLogDrain",[673,5742,758],{"class":750},[673,5744,761],{"class":746},[673,5746,764],{"class":750},[673,5748,5749],{"class":682},"evlog\u002Fhttp",[673,5751,770],{"class":750},[673,5753,5754],{"class":675,"line":773},[673,5755,777],{"emptyLinePlaceholder":776},[673,5757,5758,5760,5762,5764,5766,5768],{"class":675,"line":780},[673,5759,2022],{"class":786},[673,5761,2122],{"class":754},[673,5763,901],{"class":750},[673,5765,5740],{"class":817},[673,5767,820],{"class":754},[673,5769,823],{"class":750},[673,5771,5772,5774,5776,5778,5781,5783,5785,5788,5790],{"class":675,"line":826},[673,5773,1298],{"class":829},[673,5775,833],{"class":750},[673,5777,751],{"class":750},[673,5779,5780],{"class":829}," endpoint",[673,5782,833],{"class":750},[673,5784,764],{"class":750},[673,5786,5787],{"class":682},"\u002Fapi\u002Fevlog\u002Fhttp-ingest",[673,5789,841],{"class":750},[673,5791,2276],{"class":750},[673,5793,5794,5797,5799,5801,5803,5805,5807,5809,5811,5813,5815,5817,5819,5821,5823],{"class":675,"line":847},[673,5795,5796],{"class":829}," pipeline",[673,5798,833],{"class":750},[673,5800,751],{"class":750},[673,5802,2077],{"class":829},[673,5804,833],{"class":750},[673,5806,751],{"class":750},[673,5808,2084],{"class":829},[673,5810,833],{"class":750},[673,5812,2273],{"class":2089},[673,5814,795],{"class":750},[673,5816,2095],{"class":829},[673,5818,833],{"class":750},[673,5820,2100],{"class":2089},[673,5822,758],{"class":750},[673,5824,2276],{"class":750},[673,5826,5827,5829],{"class":675,"line":966},[673,5828,811],{"class":750},[673,5830,852],{"class":754},[673,5832,5833],{"class":675,"line":1000},[673,5834,777],{"emptyLinePlaceholder":776},[673,5836,5837,5839],{"class":675,"line":1490},[673,5838,1069],{"class":817},[673,5840,5841],{"class":754},"(drainEvent)\n",[673,5843,5844,5847,5850,5852,5855],{"class":675,"line":1498},[673,5845,5846],{"class":746},"await",[673,5848,5849],{"class":754}," drain",[673,5851,939],{"class":750},[673,5853,5854],{"class":817},"flush",[673,5856,931],{"class":754},[587,5858,5859],{},"The server endpoint receives batched events:",[663,5861,5864],{"className":736,"code":5862,"filename":5863,"language":739,"meta":669,"style":669},"export async function POST(request: Request) {\n const events = await request.json()\n \u002F\u002F Forward to your drain pipeline, Axiom, etc.\n return new Response(null, { status: 204 })\n}\n","app\u002Fapi\u002Fevlog\u002Fhttp-ingest\u002Froute.ts",[591,5865,5866,5889,5908,5913,5940],{"__ignoreMap":669},[673,5867,5868,5870,5872,5874,5877,5879,5881,5883,5885,5887],{"class":675,"line":676},[673,5869,783],{"class":746},[673,5871,3332],{"class":786},[673,5873,4263],{"class":786},[673,5875,5876],{"class":817}," POST",[673,5878,820],{"class":750},[673,5880,2808],{"class":2494},[673,5882,833],{"class":750},[673,5884,2813],{"class":679},[673,5886,2498],{"class":750},[673,5888,917],{"class":750},[673,5890,5891,5893,5896,5898,5900,5902,5904,5906],{"class":675,"line":773},[673,5892,922],{"class":786},[673,5894,5895],{"class":754}," events",[673,5897,814],{"class":750},[673,5899,1414],{"class":746},[673,5901,2845],{"class":754},[673,5903,939],{"class":750},[673,5905,977],{"class":817},[673,5907,931],{"class":829},[673,5909,5910],{"class":675,"line":780},[673,5911,5912],{"class":1535}," \u002F\u002F Forward to your drain pipeline, Axiom, etc.\n",[673,5914,5915,5917,5920,5922,5924,5927,5929,5931,5933,5936,5938],{"class":675,"line":826},[673,5916,969],{"class":746},[673,5918,5919],{"class":750}," new",[673,5921,972],{"class":817},[673,5923,820],{"class":829},[673,5925,5926],{"class":750},"null,",[673,5928,751],{"class":750},[673,5930,2296],{"class":829},[673,5932,833],{"class":750},[673,5934,5935],{"class":2089}," 204",[673,5937,758],{"class":750},[673,5939,852],{"class":829},[673,5941,5942],{"class":675,"line":847},[673,5943,4045],{"class":750},[651,5945,5947],{"id":5946},"run-locally","Run Locally",[663,5949,5952],{"className":665,"code":5950,"filename":5951,"language":668,"meta":669,"style":669},"git clone https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog.git\ncd evlog\u002Fexamples\u002Fnextjs\npnpm install\npnpm run dev\n","Terminal",[591,5953,5954,5965,5973,5980],{"__ignoreMap":669},[673,5955,5956,5959,5962],{"class":675,"line":676},[673,5957,5958],{"class":679},"git",[673,5960,5961],{"class":682}," clone",[673,5963,5964],{"class":682}," https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog.git\n",[673,5966,5967,5970],{"class":675,"line":773},[673,5968,5969],{"class":817},"cd",[673,5971,5972],{"class":682}," evlog\u002Fexamples\u002Fnextjs\n",[673,5974,5975,5977],{"class":675,"line":780},[673,5976,667],{"class":679},[673,5978,5979],{"class":682}," install\n",[673,5981,5982,5984,5987],{"class":675,"line":826},[673,5983,667],{"class":679},[673,5985,5986],{"class":682}," run",[673,5988,5989],{"class":682}," dev\n",[587,5991,5992,5993,5997],{},"Open ",[640,5994,5995],{"href":5995,"rel":5996},"http:\u002F\u002Flocalhost:3000",[644]," to explore the example.",[5999,6000,6001],"card-group",{},[6002,6003,6007],"card",{"icon":6004,"title":6005,"to":6006},"i-simple-icons-github","Source Code","https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Fnextjs","Browse the complete Next.js example source on GitHub.",[651,6009,6011],{"id":6010},"next-steps","Next Steps",[587,6013,6014,6015,6017],{},"Deepen your ",[1036,6016,245],{}," integration:",[612,6019,6020,6025,6030,6035],{},[615,6021,6022,6024],{},[640,6023,51],{"href":52},": Design comprehensive events with context layering",[615,6026,6027,6029],{},[640,6028,148],{"href":153},": Send logs to Axiom, Sentry, PostHog, and more",[615,6031,6032,6034],{},[640,6033,66],{"href":67},": Control log volume with head and tail sampling",[615,6036,6037,6039,6040,1609,6042,3435,6044,6046],{},[640,6038,56],{"href":57},": Throw errors with ",[591,6041,3431],{},[591,6043,3434],{},[591,6045,3438],{}," fields",[6048,6049,6050],"style",{},"html pre.shiki code .sBMFI, 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.sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":669,"searchDepth":773,"depth":773,"links":6052},[6053,6058,6064,6065,6066,6068,6071,6072,6073,6074,6075,6076,6077,6078,6079],{"id":653,"depth":773,"text":25,"children":6054},[6055,6056,6057],{"id":657,"depth":780,"text":658},{"id":732,"depth":780,"text":733},{"id":855,"depth":780,"text":856},{"id":1007,"depth":773,"text":1008,"children":6059},[6060,6061,6062,6063],{"id":1072,"depth":780,"text":1073},{"id":1316,"depth":780,"text":1317},{"id":1333,"depth":780,"text":1334},{"id":1657,"depth":780,"text":526},{"id":1887,"depth":773,"text":1888},{"id":2751,"depth":773,"text":51},{"id":3218,"depth":773,"text":6067},"Background work (log.fork)",{"id":3420,"depth":773,"text":3421,"children":6069},[6070],{"id":4202,"depth":780,"text":4203},{"id":4533,"depth":773,"text":526},{"id":4761,"depth":773,"text":4762},{"id":4998,"depth":773,"text":374},{"id":5112,"depth":773,"text":5113},{"id":5268,"depth":773,"text":5269},{"id":5467,"depth":773,"text":327},{"id":5718,"depth":773,"text":5719},{"id":5946,"depth":773,"text":5947},{"id":6010,"depth":773,"text":6011},"Wide events, structured errors, drain pipeline, tail sampling, route-based services, error handling, and client-side logging in Next.js applications.","md",[6083],{"label":6005,"icon":6004,"to":6006,"color":2726,"variant":6084},"subtle",{},{"title":245,"icon":248},{"title":245,"description":6080},"gFYQtJjJKLEJZbW3V7p7IMtsNNBI0cJRmGg6aBkq4tI",[6090,6092],{"title":240,"path":241,"stem":242,"description":6091,"icon":243,"children":-1},"Add the Nuxt module and every server route emits one wide event. `useLogger(event)` and `parseError` are auto-imported, `createError` comes from `evlog`.",{"title":250,"path":251,"stem":252,"description":6093,"icon":253,"children":-1},"Wire the handle and handleError hooks once, and every SvelteKit request carries a logger on `event.locals.log` until the response ends.",1789074376538]