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Benchmarked at ",[556,645,646],{"href":509},"~3 µs\u002Frequest",", 7.7x faster than pino in the wide event pattern (1 event vs 4 log lines) and competitive on every other path.",[638,649,650,653,654,657,658,661,662,665],{},[543,651,652],{},"Same API in every context"," — scripts, frameworks, edge runtimes, browser, library code. No ",[548,655,656],{},"pino-http"," vs ",[548,659,660],{},"pino"," split, no separate ",[548,663,664],{},"consola"," reporters per environment.",[638,667,668,682],{},[543,669,670,671,674,675,674,678,681],{},"Structured errors with ",[548,672,673],{},"why"," \u002F ",[548,676,677],{},"fix",[548,679,680],{},"link"," built in"," — your error toast finally tells users what went wrong and what to do, your on-call stops reverse-engineering stack traces.",[638,684,685,688,689,692,693,696],{},[543,686,687],{},"Wide events as a free upgrade path"," — when you need to correlate context across an operation, the same logger gives you ",[548,690,691],{},"log.set"," + ",[548,694,695],{},"log.emit"," instead of stitching log lines together later.",[540,698,699,700,703],{},"See the full ",[556,701,702],{"href":522},"feature comparison"," (parity matrix, honest gaps, and migration snippets) for a side-by-side with pino, winston, and consola.",[580,705,707],{"id":706},"three-ways-to-log","Three Ways to Log",[540,709,710],{},"evlog provides three APIs for different contexts. You can use all three in the same project.",[712,713,41],"h3",{"id":714},"simple-logging",[540,716,717,718,720],{},"Fire-and-forget structured logs. Replace ",[548,719,550],{},", consola, or pino:",[722,723,729],"pre",{"className":724,"code":725,"filename":726,"language":727,"meta":728,"style":728},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { log } from 'evlog'\n\nlog.info('auth', 'User logged in')\nlog.error({ action: 'payment', error: 'card_declined', userId: 42 })\n","src\u002Findex.ts","typescript","",[548,730,731,763,770,806],{"__ignoreMap":728},[732,733,736,740,744,748,751,754,757,760],"span",{"class":734,"line":735},"line",1,[732,737,739],{"class":738},"s7zQu","import",[732,741,743],{"class":742},"sMK4o"," {",[732,745,747],{"class":746},"sTEyZ"," log",[732,749,750],{"class":742}," }",[732,752,753],{"class":738}," from",[732,755,756],{"class":742}," '",[732,758,545],{"class":759},"sfazB",[732,761,762],{"class":742},"'\n",[732,764,766],{"class":734,"line":765},2,[732,767,769],{"emptyLinePlaceholder":768},true,"\n",[732,771,773,776,779,782,785,788,791,793,796,798,801,803],{"class":734,"line":772},3,[732,774,775],{"class":746},"log",[732,777,778],{"class":742},".",[732,780,617],{"class":781},"s2Zo4",[732,783,784],{"class":746},"(",[732,786,787],{"class":742},"'",[732,789,790],{"class":759},"auth",[732,792,787],{"class":742},[732,794,795],{"class":742},",",[732,797,756],{"class":742},[732,799,800],{"class":759},"User logged in",[732,802,787],{"class":742},[732,804,805],{"class":746},")\n",[732,807,809,811,813,816,818,821,825,828,830,833,835,837,840,842,844,847,849,851,854,856,860,862],{"class":734,"line":808},4,[732,810,775],{"class":746},[732,812,778],{"class":742},[732,814,815],{"class":781},"error",[732,817,784],{"class":746},[732,819,820],{"class":742},"{",[732,822,824],{"class":823},"swJcz"," action",[732,826,827],{"class":742},":",[732,829,756],{"class":742},[732,831,832],{"class":759},"payment",[732,834,787],{"class":742},[732,836,795],{"class":742},[732,838,839],{"class":823}," error",[732,841,827],{"class":742},[732,843,756],{"class":742},[732,845,846],{"class":759},"card_declined",[732,848,787],{"class":742},[732,850,795],{"class":742},[732,852,853],{"class":823}," userId",[732,855,827],{"class":742},[732,857,859],{"class":858},"sbssI"," 42",[732,861,750],{"class":742},[732,863,805],{"class":746},[712,865,46],{"id":866},"wide-events",[540,868,869],{},"Accumulate context progressively over any operation, then emit a single comprehensive event:",[871,872,873,1006,1136],"code-group",{},[722,874,877],{"className":724,"code":875,"filename":876,"language":727,"meta":728,"style":728},"import { createLogger } from 'evlog'\n\nconst log = createLogger({ jobId: 'sync-001', queue: 'emails' })\nlog.set({ batch: { size: 50, processed: 50 } })\nlog.emit()\n","scripts\u002Fsync-job.ts",[548,878,879,898,902,950,993],{"__ignoreMap":728},[732,880,881,883,885,888,890,892,894,896],{"class":734,"line":735},[732,882,739],{"class":738},[732,884,743],{"class":742},[732,886,887],{"class":746}," createLogger",[732,889,750],{"class":742},[732,891,753],{"class":738},[732,893,756],{"class":742},[732,895,545],{"class":759},[732,897,762],{"class":742},[732,899,900],{"class":734,"line":765},[732,901,769],{"emptyLinePlaceholder":768},[732,903,904,908,911,914,916,918,920,923,925,927,930,932,934,937,939,941,944,946,948],{"class":734,"line":772},[732,905,907],{"class":906},"spNyl","const",[732,909,910],{"class":746}," log ",[732,912,913],{"class":742},"=",[732,915,887],{"class":781},[732,917,784],{"class":746},[732,919,820],{"class":742},[732,921,922],{"class":823}," jobId",[732,924,827],{"class":742},[732,926,756],{"class":742},[732,928,929],{"class":759},"sync-001",[732,931,787],{"class":742},[732,933,795],{"class":742},[732,935,936],{"class":823}," queue",[732,938,827],{"class":742},[732,940,756],{"class":742},[732,942,943],{"class":759},"emails",[732,945,787],{"class":742},[732,947,750],{"class":742},[732,949,805],{"class":746},[732,951,952,954,956,959,961,963,966,968,970,973,975,978,980,983,985,987,989,991],{"class":734,"line":808},[732,953,775],{"class":746},[732,955,778],{"class":742},[732,957,958],{"class":781},"set",[732,960,784],{"class":746},[732,962,820],{"class":742},[732,964,965],{"class":823}," batch",[732,967,827],{"class":742},[732,969,743],{"class":742},[732,971,972],{"class":823}," size",[732,974,827],{"class":742},[732,976,977],{"class":858}," 50",[732,979,795],{"class":742},[732,981,982],{"class":823}," processed",[732,984,827],{"class":742},[732,986,977],{"class":858},[732,988,750],{"class":742},[732,990,750],{"class":742},[732,992,805],{"class":746},[732,994,996,998,1000,1003],{"class":734,"line":995},5,[732,997,775],{"class":746},[732,999,778],{"class":742},[732,1001,1002],{"class":781},"emit",[732,1004,1005],{"class":746},"()\n",[722,1007,1010],{"className":724,"code":1008,"filename":1009,"language":727,"meta":728,"style":728},"import { createRequestLogger } from 'evlog'\n\nconst log = createRequestLogger({ method: 'POST', path: '\u002Fapi\u002Fcheckout' })\nlog.set({ user: { id: 1, plan: 'pro' } })\nlog.emit()\n","src\u002Fworker.ts",[548,1011,1012,1031,1035,1079,1126],{"__ignoreMap":728},[732,1013,1014,1016,1018,1021,1023,1025,1027,1029],{"class":734,"line":735},[732,1015,739],{"class":738},[732,1017,743],{"class":742},[732,1019,1020],{"class":746}," createRequestLogger",[732,1022,750],{"class":742},[732,1024,753],{"class":738},[732,1026,756],{"class":742},[732,1028,545],{"class":759},[732,1030,762],{"class":742},[732,1032,1033],{"class":734,"line":765},[732,1034,769],{"emptyLinePlaceholder":768},[732,1036,1037,1039,1041,1043,1045,1047,1049,1052,1054,1056,1059,1061,1063,1066,1068,1070,1073,1075,1077],{"class":734,"line":772},[732,1038,907],{"class":906},[732,1040,910],{"class":746},[732,1042,913],{"class":742},[732,1044,1020],{"class":781},[732,1046,784],{"class":746},[732,1048,820],{"class":742},[732,1050,1051],{"class":823}," method",[732,1053,827],{"class":742},[732,1055,756],{"class":742},[732,1057,1058],{"class":759},"POST",[732,1060,787],{"class":742},[732,1062,795],{"class":742},[732,1064,1065],{"class":823}," path",[732,1067,827],{"class":742},[732,1069,756],{"class":742},[732,1071,1072],{"class":759},"\u002Fapi\u002Fcheckout",[732,1074,787],{"class":742},[732,1076,750],{"class":742},[732,1078,805],{"class":746},[732,1080,1081,1083,1085,1087,1089,1091,1094,1096,1098,1101,1103,1106,1108,1111,1113,1115,1118,1120,1122,1124],{"class":734,"line":808},[732,1082,775],{"class":746},[732,1084,778],{"class":742},[732,1086,958],{"class":781},[732,1088,784],{"class":746},[732,1090,820],{"class":742},[732,1092,1093],{"class":823}," user",[732,1095,827],{"class":742},[732,1097,743],{"class":742},[732,1099,1100],{"class":823}," id",[732,1102,827],{"class":742},[732,1104,1105],{"class":858}," 1",[732,1107,795],{"class":742},[732,1109,1110],{"class":823}," plan",[732,1112,827],{"class":742},[732,1114,756],{"class":742},[732,1116,1117],{"class":759},"pro",[732,1119,787],{"class":742},[732,1121,750],{"class":742},[732,1123,750],{"class":742},[732,1125,805],{"class":746},[732,1127,1128,1130,1132,1134],{"class":734,"line":995},[732,1129,775],{"class":746},[732,1131,778],{"class":742},[732,1133,1002],{"class":781},[732,1135,1005],{"class":746},[722,1137,1140],{"className":724,"code":1138,"filename":1139,"language":727,"meta":728,"style":728},"import { useLogger } from 'evlog'\n\nexport default defineEventHandler(async (event) => {\n  const log = useLogger(event)\n  log.set({ user: { id: 1, plan: 'pro' } })\n  return { success: true }\n  \u002F\u002F auto-emitted on response end\n})\n","server\u002Fapi\u002Fcheckout.post.ts",[548,1141,1142,1161,1165,1196,1214,1257,1277,1284],{"__ignoreMap":728},[732,1143,1144,1146,1148,1151,1153,1155,1157,1159],{"class":734,"line":735},[732,1145,739],{"class":738},[732,1147,743],{"class":742},[732,1149,1150],{"class":746}," useLogger",[732,1152,750],{"class":742},[732,1154,753],{"class":738},[732,1156,756],{"class":742},[732,1158,545],{"class":759},[732,1160,762],{"class":742},[732,1162,1163],{"class":734,"line":765},[732,1164,769],{"emptyLinePlaceholder":768},[732,1166,1167,1170,1173,1176,1178,1181,1183,1187,1190,1193],{"class":734,"line":772},[732,1168,1169],{"class":738},"export",[732,1171,1172],{"class":738}," default",[732,1174,1175],{"class":781}," defineEventHandler",[732,1177,784],{"class":746},[732,1179,1180],{"class":906},"async",[732,1182,574],{"class":742},[732,1184,1186],{"class":1185},"sHdIc","event",[732,1188,1189],{"class":742},")",[732,1191,1192],{"class":906}," =>",[732,1194,1195],{"class":742}," {\n",[732,1197,1198,1201,1203,1206,1208,1210,1212],{"class":734,"line":808},[732,1199,1200],{"class":906},"  const",[732,1202,747],{"class":746},[732,1204,1205],{"class":742}," =",[732,1207,1150],{"class":781},[732,1209,784],{"class":823},[732,1211,1186],{"class":746},[732,1213,805],{"class":823},[732,1215,1216,1219,1221,1223,1225,1227,1229,1231,1233,1235,1237,1239,1241,1243,1245,1247,1249,1251,1253,1255],{"class":734,"line":995},[732,1217,1218],{"class":746},"  log",[732,1220,778],{"class":742},[732,1222,958],{"class":781},[732,1224,784],{"class":823},[732,1226,820],{"class":742},[732,1228,1093],{"class":823},[732,1230,827],{"class":742},[732,1232,743],{"class":742},[732,1234,1100],{"class":823},[732,1236,827],{"class":742},[732,1238,1105],{"class":858},[732,1240,795],{"class":742},[732,1242,1110],{"class":823},[732,1244,827],{"class":742},[732,1246,756],{"class":742},[732,1248,1117],{"class":759},[732,1250,787],{"class":742},[732,1252,750],{"class":742},[732,1254,750],{"class":742},[732,1256,805],{"class":823},[732,1258,1260,1263,1265,1268,1270,1274],{"class":734,"line":1259},6,[732,1261,1262],{"class":738},"  return",[732,1264,743],{"class":742},[732,1266,1267],{"class":823}," success",[732,1269,827],{"class":742},[732,1271,1273],{"class":1272},"sfNiH"," true",[732,1275,1276],{"class":742}," }\n",[732,1278,1280],{"class":734,"line":1279},7,[732,1281,1283],{"class":1282},"sHwdD","  \u002F\u002F auto-emitted on response end\n",[732,1285,1287,1290],{"class":734,"line":1286},8,[732,1288,1289],{"class":742},"}",[732,1291,805],{"class":746},[540,1293,1294],{},"One log, all context. Everything you need to understand what happened.",[712,1296,51],{"id":1297},"structured-errors",[540,1299,1300,1301,1303,1304,1306,1307,1309],{},"Errors with actionable context: ",[548,1302,673],{}," it happened, how to ",[548,1305,677],{}," it, and a ",[548,1308,680],{}," to docs:",[871,1311,1312,1436],{},[722,1313,1315],{"className":724,"code":1314,"filename":1139,"language":727,"meta":728,"style":728},"import { createError } from 'evlog'\n\nthrow createError({\n  message: 'Payment failed',\n  status: 402,\n  why: 'Card declined by issuer (insufficient funds)',\n  fix: 'Try a different payment method or contact your bank',\n  link: 'https:\u002F\u002Fdocs.example.com\u002Fpayments\u002Fdeclined',\n})\n",[548,1316,1317,1336,1340,1352,1369,1381,1397,1413,1429],{"__ignoreMap":728},[732,1318,1319,1321,1323,1326,1328,1330,1332,1334],{"class":734,"line":735},[732,1320,739],{"class":738},[732,1322,743],{"class":742},[732,1324,1325],{"class":746}," createError",[732,1327,750],{"class":742},[732,1329,753],{"class":738},[732,1331,756],{"class":742},[732,1333,545],{"class":759},[732,1335,762],{"class":742},[732,1337,1338],{"class":734,"line":765},[732,1339,769],{"emptyLinePlaceholder":768},[732,1341,1342,1345,1347,1349],{"class":734,"line":772},[732,1343,1344],{"class":738},"throw",[732,1346,1325],{"class":781},[732,1348,784],{"class":746},[732,1350,1351],{"class":742},"{\n",[732,1353,1354,1357,1359,1361,1364,1366],{"class":734,"line":808},[732,1355,1356],{"class":823},"  message",[732,1358,827],{"class":742},[732,1360,756],{"class":742},[732,1362,1363],{"class":759},"Payment failed",[732,1365,787],{"class":742},[732,1367,1368],{"class":742},",\n",[732,1370,1371,1374,1376,1379],{"class":734,"line":995},[732,1372,1373],{"class":823},"  status",[732,1375,827],{"class":742},[732,1377,1378],{"class":858}," 402",[732,1380,1368],{"class":742},[732,1382,1383,1386,1388,1390,1393,1395],{"class":734,"line":1259},[732,1384,1385],{"class":823},"  why",[732,1387,827],{"class":742},[732,1389,756],{"class":742},[732,1391,1392],{"class":759},"Card declined by issuer (insufficient funds)",[732,1394,787],{"class":742},[732,1396,1368],{"class":742},[732,1398,1399,1402,1404,1406,1409,1411],{"class":734,"line":1279},[732,1400,1401],{"class":823},"  fix",[732,1403,827],{"class":742},[732,1405,756],{"class":742},[732,1407,1408],{"class":759},"Try a different payment method or contact your bank",[732,1410,787],{"class":742},[732,1412,1368],{"class":742},[732,1414,1415,1418,1420,1422,1425,1427],{"class":734,"line":1286},[732,1416,1417],{"class":823},"  link",[732,1419,827],{"class":742},[732,1421,756],{"class":742},[732,1423,1424],{"class":759},"https:\u002F\u002Fdocs.example.com\u002Fpayments\u002Fdeclined",[732,1426,787],{"class":742},[732,1428,1368],{"class":742},[732,1430,1432,1434],{"class":734,"line":1431},9,[732,1433,1289],{"class":742},[732,1435,805],{"class":746},[722,1437,1442],{"className":1438,"code":1439,"filename":1440,"language":1441,"meta":728,"style":728},"language-json shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","{\n  \"statusCode\": 402,\n  \"message\": \"Payment failed\",\n  \"data\": {\n    \"why\": \"Card declined by issuer (insufficient funds)\",\n    \"fix\": \"Try a different payment method or contact your bank\",\n    \"link\": \"https:\u002F\u002Fdocs.example.com\u002Fpayments\u002Fdeclined\"\n  }\n}\n","Response","json",[548,1443,1444,1448,1465,1485,1498,1518,1536,1553,1558],{"__ignoreMap":728},[732,1445,1446],{"class":734,"line":735},[732,1447,1351],{"class":742},[732,1449,1450,1453,1456,1459,1461,1463],{"class":734,"line":765},[732,1451,1452],{"class":742},"  \"",[732,1454,1455],{"class":906},"statusCode",[732,1457,1458],{"class":742},"\"",[732,1460,827],{"class":742},[732,1462,1378],{"class":858},[732,1464,1368],{"class":742},[732,1466,1467,1469,1472,1474,1476,1479,1481,1483],{"class":734,"line":772},[732,1468,1452],{"class":742},[732,1470,1471],{"class":906},"message",[732,1473,1458],{"class":742},[732,1475,827],{"class":742},[732,1477,1478],{"class":742}," 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