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No ",[519,626,627],{},"pino-http"," vs ",[519,630,631],{},"pino"," split, no separate ",[519,634,635],{},"consola"," reporters per environment.",[609,638,639,653],{},[514,640,641,642,645,646,645,649,652],{},"Structured errors with ",[519,643,644],{},"why"," \u002F ",[519,647,648],{},"fix",[519,650,651],{},"link"," built in"," — your error toast finally tells users what went wrong and what to do, your on-call stops reverse-engineering stack traces.",[609,655,656,659,660,663,664,667],{},[514,657,658],{},"Wide events as a free upgrade path"," — when you need to correlate context across an operation, the same logger gives you ",[519,661,662],{},"log.set"," + ",[519,665,666],{},"log.emit"," instead of stitching log lines together later.",[511,669,670,671,674],{},"See the full ",[527,672,673],{"href":498},"feature comparison"," (parity matrix, honest gaps, and migration snippets) for a side-by-side with pino, winston, and consola.",[551,676,678],{"id":677},"three-ways-to-log","Three Ways to Log",[511,680,681],{},"evlog provides three APIs for different contexts. You can use all three in the same project.",[683,684,41],"h3",{"id":685},"simple-logging",[511,687,688,689,691],{},"Fire-and-forget structured logs. Replace ",[519,690,521],{},", consola, or pino:",[693,694,700],"pre",{"className":695,"code":696,"filename":697,"language":698,"meta":699,"style":699},"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","",[519,701,702,734,741,777],{"__ignoreMap":699},[703,704,707,711,715,719,722,725,728,731],"span",{"class":705,"line":706},"line",1,[703,708,710],{"class":709},"s7zQu","import",[703,712,714],{"class":713},"sMK4o"," {",[703,716,718],{"class":717},"sTEyZ"," log",[703,720,721],{"class":713}," }",[703,723,724],{"class":709}," from",[703,726,727],{"class":713}," '",[703,729,516],{"class":730},"sfazB",[703,732,733],{"class":713},"'\n",[703,735,737],{"class":705,"line":736},2,[703,738,740],{"emptyLinePlaceholder":739},true,"\n",[703,742,744,747,750,753,756,759,762,764,767,769,772,774],{"class":705,"line":743},3,[703,745,746],{"class":717},"log",[703,748,749],{"class":713},".",[703,751,588],{"class":752},"s2Zo4",[703,754,755],{"class":717},"(",[703,757,758],{"class":713},"'",[703,760,761],{"class":730},"auth",[703,763,758],{"class":713},[703,765,766],{"class":713},",",[703,768,727],{"class":713},[703,770,771],{"class":730},"User logged in",[703,773,758],{"class":713},[703,775,776],{"class":717},")\n",[703,778,780,782,784,787,789,792,796,799,801,804,806,808,811,813,815,818,820,822,825,827,831,833],{"class":705,"line":779},4,[703,781,746],{"class":717},[703,783,749],{"class":713},[703,785,786],{"class":752},"error",[703,788,755],{"class":717},[703,790,791],{"class":713},"{",[703,793,795],{"class":794},"swJcz"," action",[703,797,798],{"class":713},":",[703,800,727],{"class":713},[703,802,803],{"class":730},"payment",[703,805,758],{"class":713},[703,807,766],{"class":713},[703,809,810],{"class":794}," error",[703,812,798],{"class":713},[703,814,727],{"class":713},[703,816,817],{"class":730},"card_declined",[703,819,758],{"class":713},[703,821,766],{"class":713},[703,823,824],{"class":794}," userId",[703,826,798],{"class":713},[703,828,830],{"class":829},"sbssI"," 42",[703,832,721],{"class":713},[703,834,776],{"class":717},[683,836,46],{"id":837},"wide-events",[511,839,840],{},"Accumulate context progressively over any operation, then emit a single comprehensive event:",[842,843,844,977,1107],"code-group",{},[693,845,848],{"className":695,"code":846,"filename":847,"language":698,"meta":699,"style":699},"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",[519,849,850,869,873,921,964],{"__ignoreMap":699},[703,851,852,854,856,859,861,863,865,867],{"class":705,"line":706},[703,853,710],{"class":709},[703,855,714],{"class":713},[703,857,858],{"class":717}," createLogger",[703,860,721],{"class":713},[703,862,724],{"class":709},[703,864,727],{"class":713},[703,866,516],{"class":730},[703,868,733],{"class":713},[703,870,871],{"class":705,"line":736},[703,872,740],{"emptyLinePlaceholder":739},[703,874,875,879,882,885,887,889,891,894,896,898,901,903,905,908,910,912,915,917,919],{"class":705,"line":743},[703,876,878],{"class":877},"spNyl","const",[703,880,881],{"class":717}," log ",[703,883,884],{"class":713},"=",[703,886,858],{"class":752},[703,888,755],{"class":717},[703,890,791],{"class":713},[703,892,893],{"class":794}," jobId",[703,895,798],{"class":713},[703,897,727],{"class":713},[703,899,900],{"class":730},"sync-001",[703,902,758],{"class":713},[703,904,766],{"class":713},[703,906,907],{"class":794}," queue",[703,909,798],{"class":713},[703,911,727],{"class":713},[703,913,914],{"class":730},"emails",[703,916,758],{"class":713},[703,918,721],{"class":713},[703,920,776],{"class":717},[703,922,923,925,927,930,932,934,937,939,941,944,946,949,951,954,956,958,960,962],{"class":705,"line":779},[703,924,746],{"class":717},[703,926,749],{"class":713},[703,928,929],{"class":752},"set",[703,931,755],{"class":717},[703,933,791],{"class":713},[703,935,936],{"class":794}," batch",[703,938,798],{"class":713},[703,940,714],{"class":713},[703,942,943],{"class":794}," size",[703,945,798],{"class":713},[703,947,948],{"class":829}," 50",[703,950,766],{"class":713},[703,952,953],{"class":794}," processed",[703,955,798],{"class":713},[703,957,948],{"class":829},[703,959,721],{"class":713},[703,961,721],{"class":713},[703,963,776],{"class":717},[703,965,967,969,971,974],{"class":705,"line":966},5,[703,968,746],{"class":717},[703,970,749],{"class":713},[703,972,973],{"class":752},"emit",[703,975,976],{"class":717},"()\n",[693,978,981],{"className":695,"code":979,"filename":980,"language":698,"meta":699,"style":699},"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",[519,982,983,1002,1006,1050,1097],{"__ignoreMap":699},[703,984,985,987,989,992,994,996,998,1000],{"class":705,"line":706},[703,986,710],{"class":709},[703,988,714],{"class":713},[703,990,991],{"class":717}," createRequestLogger",[703,993,721],{"class":713},[703,995,724],{"class":709},[703,997,727],{"class":713},[703,999,516],{"class":730},[703,1001,733],{"class":713},[703,1003,1004],{"class":705,"line":736},[703,1005,740],{"emptyLinePlaceholder":739},[703,1007,1008,1010,1012,1014,1016,1018,1020,1023,1025,1027,1030,1032,1034,1037,1039,1041,1044,1046,1048],{"class":705,"line":743},[703,1009,878],{"class":877},[703,1011,881],{"class":717},[703,1013,884],{"class":713},[703,1015,991],{"class":752},[703,1017,755],{"class":717},[703,1019,791],{"class":713},[703,1021,1022],{"class":794}," method",[703,1024,798],{"class":713},[703,1026,727],{"class":713},[703,1028,1029],{"class":730},"POST",[703,1031,758],{"class":713},[703,1033,766],{"class":713},[703,1035,1036],{"class":794}," path",[703,1038,798],{"class":713},[703,1040,727],{"class":713},[703,1042,1043],{"class":730},"\u002Fapi\u002Fcheckout",[703,1045,758],{"class":713},[703,1047,721],{"class":713},[703,1049,776],{"class":717},[703,1051,1052,1054,1056,1058,1060,1062,1065,1067,1069,1072,1074,1077,1079,1082,1084,1086,1089,1091,1093,1095],{"class":705,"line":779},[703,1053,746],{"class":717},[703,1055,749],{"class":713},[703,1057,929],{"class":752},[703,1059,755],{"class":717},[703,1061,791],{"class":713},[703,1063,1064],{"class":794}," user",[703,1066,798],{"class":713},[703,1068,714],{"class":713},[703,1070,1071],{"class":794}," id",[703,1073,798],{"class":713},[703,1075,1076],{"class":829}," 1",[703,1078,766],{"class":713},[703,1080,1081],{"class":794}," plan",[703,1083,798],{"class":713},[703,1085,727],{"class":713},[703,1087,1088],{"class":730},"pro",[703,1090,758],{"class":713},[703,1092,721],{"class":713},[703,1094,721],{"class":713},[703,1096,776],{"class":717},[703,1098,1099,1101,1103,1105],{"class":705,"line":966},[703,1100,746],{"class":717},[703,1102,749],{"class":713},[703,1104,973],{"class":752},[703,1106,976],{"class":717},[693,1108,1111],{"className":695,"code":1109,"filename":1110,"language":698,"meta":699,"style":699},"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",[519,1112,1113,1132,1136,1167,1185,1228,1248,1255],{"__ignoreMap":699},[703,1114,1115,1117,1119,1122,1124,1126,1128,1130],{"class":705,"line":706},[703,1116,710],{"class":709},[703,1118,714],{"class":713},[703,1120,1121],{"class":717}," useLogger",[703,1123,721],{"class":713},[703,1125,724],{"class":709},[703,1127,727],{"class":713},[703,1129,516],{"class":730},[703,1131,733],{"class":713},[703,1133,1134],{"class":705,"line":736},[703,1135,740],{"emptyLinePlaceholder":739},[703,1137,1138,1141,1144,1147,1149,1152,1154,1158,1161,1164],{"class":705,"line":743},[703,1139,1140],{"class":709},"export",[703,1142,1143],{"class":709}," default",[703,1145,1146],{"class":752}," defineEventHandler",[703,1148,755],{"class":717},[703,1150,1151],{"class":877},"async",[703,1153,545],{"class":713},[703,1155,1157],{"class":1156},"sHdIc","event",[703,1159,1160],{"class":713},")",[703,1162,1163],{"class":877}," =>",[703,1165,1166],{"class":713}," {\n",[703,1168,1169,1172,1174,1177,1179,1181,1183],{"class":705,"line":779},[703,1170,1171],{"class":877},"  const",[703,1173,718],{"class":717},[703,1175,1176],{"class":713}," =",[703,1178,1121],{"class":752},[703,1180,755],{"class":794},[703,1182,1157],{"class":717},[703,1184,776],{"class":794},[703,1186,1187,1190,1192,1194,1196,1198,1200,1202,1204,1206,1208,1210,1212,1214,1216,1218,1220,1222,1224,1226],{"class":705,"line":966},[703,1188,1189],{"class":717},"  log",[703,1191,749],{"class":713},[703,1193,929],{"class":752},[703,1195,755],{"class":794},[703,1197,791],{"class":713},[703,1199,1064],{"class":794},[703,1201,798],{"class":713},[703,1203,714],{"class":713},[703,1205,1071],{"class":794},[703,1207,798],{"class":713},[703,1209,1076],{"class":829},[703,1211,766],{"class":713},[703,1213,1081],{"class":794},[703,1215,798],{"class":713},[703,1217,727],{"class":713},[703,1219,1088],{"class":730},[703,1221,758],{"class":713},[703,1223,721],{"class":713},[703,1225,721],{"class":713},[703,1227,776],{"class":794},[703,1229,1231,1234,1236,1239,1241,1245],{"class":705,"line":1230},6,[703,1232,1233],{"class":709},"  return",[703,1235,714],{"class":713},[703,1237,1238],{"class":794}," success",[703,1240,798],{"class":713},[703,1242,1244],{"class":1243},"sfNiH"," true",[703,1246,1247],{"class":713}," }\n",[703,1249,1251],{"class":705,"line":1250},7,[703,1252,1254],{"class":1253},"sHwdD","  \u002F\u002F auto-emitted on response end\n",[703,1256,1258,1261],{"class":705,"line":1257},8,[703,1259,1260],{"class":713},"}",[703,1262,776],{"class":717},[511,1264,1265],{},"One log, all context. Everything you need to understand what happened.",[683,1267,51],{"id":1268},"structured-errors",[511,1270,1271,1272,1274,1275,1277,1278,1280],{},"Errors with actionable context: ",[519,1273,644],{}," it happened, how to ",[519,1276,648],{}," it, and a ",[519,1279,651],{}," to docs:",[842,1282,1283,1407],{},[693,1284,1286],{"className":695,"code":1285,"filename":1110,"language":698,"meta":699,"style":699},"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",[519,1287,1288,1307,1311,1323,1340,1352,1368,1384,1400],{"__ignoreMap":699},[703,1289,1290,1292,1294,1297,1299,1301,1303,1305],{"class":705,"line":706},[703,1291,710],{"class":709},[703,1293,714],{"class":713},[703,1295,1296],{"class":717}," createError",[703,1298,721],{"class":713},[703,1300,724],{"class":709},[703,1302,727],{"class":713},[703,1304,516],{"class":730},[703,1306,733],{"class":713},[703,1308,1309],{"class":705,"line":736},[703,1310,740],{"emptyLinePlaceholder":739},[703,1312,1313,1316,1318,1320],{"class":705,"line":743},[703,1314,1315],{"class":709},"throw",[703,1317,1296],{"class":752},[703,1319,755],{"class":717},[703,1321,1322],{"class":713},"{\n",[703,1324,1325,1328,1330,1332,1335,1337],{"class":705,"line":779},[703,1326,1327],{"class":794},"  message",[703,1329,798],{"class":713},[703,1331,727],{"class":713},[703,1333,1334],{"class":730},"Payment failed",[703,1336,758],{"class":713},[703,1338,1339],{"class":713},",\n",[703,1341,1342,1345,1347,1350],{"class":705,"line":966},[703,1343,1344],{"class":794},"  status",[703,1346,798],{"class":713},[703,1348,1349],{"class":829}," 402",[703,1351,1339],{"class":713},[703,1353,1354,1357,1359,1361,1364,1366],{"class":705,"line":1230},[703,1355,1356],{"class":794},"  why",[703,1358,798],{"class":713},[703,1360,727],{"class":713},[703,1362,1363],{"class":730},"Card declined by issuer (insufficient funds)",[703,1365,758],{"class":713},[703,1367,1339],{"class":713},[703,1369,1370,1373,1375,1377,1380,1382],{"class":705,"line":1250},[703,1371,1372],{"class":794},"  fix",[703,1374,798],{"class":713},[703,1376,727],{"class":713},[703,1378,1379],{"class":730},"Try a different payment method or contact your bank",[703,1381,758],{"class":713},[703,1383,1339],{"class":713},[703,1385,1386,1389,1391,1393,1396,1398],{"class":705,"line":1257},[703,1387,1388],{"class":794},"  link",[703,1390,798],{"class":713},[703,1392,727],{"class":713},[703,1394,1395],{"class":730},"https:\u002F\u002Fdocs.example.com\u002Fpayments\u002Fdeclined",[703,1397,758],{"class":713},[703,1399,1339],{"class":713},[703,1401,1403,1405],{"class":705,"line":1402},9,[703,1404,1260],{"class":713},[703,1406,776],{"class":717},[693,1408,1413],{"className":1409,"code":1410,"filename":1411,"language":1412,"meta":699,"style":699},"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",[519,1414,1415,1419,1436,1456,1469,1489,1507,1524,1529],{"__ignoreMap":699},[703,1416,1417],{"class":705,"line":706},[703,1418,1322],{"class":713},[703,1420,1421,1424,1427,1430,1432,1434],{"class":705,"line":736},[703,1422,1423],{"class":713},"  \"",[703,1425,1426],{"class":877},"statusCode",[703,1428,1429],{"class":713},"\"",[703,1431,798],{"class":713},[703,1433,1349],{"class":829},[703,1435,1339],{"class":713},[703,1437,1438,1440,1443,1445,1447,1450,1452,1454],{"class":705,"line":743},[703,1439,1423],{"class":713},[703,1441,1442],{"class":877},"message",[703,1444,1429],{"class":713},[703,1446,798],{"class":713},[703,1448,1449],{"class":713}," \"",[703,1451,1334],{"class":730},[703,1453,1429],{"class":713},[703,1455,1339],{"class":713},[703,1457,1458,1460,1463,1465,1467],{"class":705,"line":779},[703,1459,1423],{"class":713},[703,1461,1462],{"class":877},"data",[703,1464,1429],{"class":713},[703,1466,798],{"class":713},[703,1468,1166],{"class":713},[703,1470,1471,1474,1477,1479,1481,1483,1485,1487],{"class":705,"line":966},[703,1472,1473],{"class":713},"    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