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Unlike framework integrations, Workers require manual ",[557,562,563],{},"log.emit()"," calls since there is no middleware lifecycle to hook into.",[566,567,570,573,600],"prompt",{":actions":568,"description":569,"icon":269},"[\"copy\",\"cursor\",\"windsurf\"]","Set up evlog in my Cloudflare Worker",[553,571,572],{},"Set up evlog in my Cloudflare Worker.",[574,575,576,580,583,586,594,597],"ul",{},[577,578,579],"li",{},"Install evlog: pnpm add evlog",[577,581,582],{},"Import initWorkersLogger and defineWorkerFetch from 'evlog\u002Fworkers'",[577,584,585],{},"Call initWorkersLogger({ env: { service: 'my-worker' } }) at the top level",[577,587,588,589,593],{},"In the fetch handler, use ",[590,591,592],"strong",{},"defineWorkerFetch"," (recommended) or createWorkersLogger(request, { executionCtx: ctx })",[577,595,596],{},"Use log.set() to accumulate context throughout the request",[577,598,599],{},"Call log.emit() manually before returning the response (no middleware lifecycle)",[553,601,602,603,609,610],{},"Docs: ",[604,605,606],"a",{"href":606,"rel":607},"https:\u002F\u002Fwww.evlog.dev\u002Fframeworks\u002Fcloudflare-workers",[608],"nofollow","\nAdapters: ",[604,611,612],{"href":612,"rel":613},"https:\u002F\u002Fwww.evlog.dev\u002Fadapters",[608],[615,616,20],"h2",{"id":617},"quick-start",[619,620,622],"h3",{"id":621},"_1-install","1. Install",[624,625,626,651,665,679],"code-group",{},[627,628,634],"pre",{"className":629,"code":630,"filename":631,"language":632,"meta":633,"style":633},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[557,635,636],{"__ignoreMap":633},[637,638,641,644,648],"span",{"class":639,"line":640},"line",1,[637,642,631],{"class":643},"sBMFI",[637,645,647],{"class":646},"sfazB"," add",[637,649,650],{"class":646}," evlog\n",[627,652,655],{"className":629,"code":653,"filename":654,"language":632,"meta":633,"style":633},"bun add evlog\n","bun",[557,656,657],{"__ignoreMap":633},[637,658,659,661,663],{"class":639,"line":640},[637,660,654],{"class":643},[637,662,647],{"class":646},[637,664,650],{"class":646},[627,666,669],{"className":629,"code":667,"filename":668,"language":632,"meta":633,"style":633},"yarn add evlog\n","yarn",[557,670,671],{"__ignoreMap":633},[637,672,673,675,677],{"class":639,"line":640},[637,674,668],{"class":643},[637,676,647],{"class":646},[637,678,650],{"class":646},[627,680,683],{"className":629,"code":681,"filename":682,"language":632,"meta":633,"style":633},"npm install evlog\n","npm",[557,684,685],{"__ignoreMap":633},[637,686,687,689,692],{"class":639,"line":640},[637,688,682],{"class":643},[637,690,691],{"class":646}," install",[637,693,650],{"class":646},[619,695,697],{"id":696},"_2-initialize-and-create-request-loggers","2. Initialize and create request loggers",[627,699,704],{"className":700,"code":701,"filename":702,"language":703,"meta":633,"style":633},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { defineWorkerFetch, initWorkersLogger } from 'evlog\u002Fworkers'\n\ninitWorkersLogger({\n  env: { service: 'my-worker' },\n})\n\nexport default defineWorkerFetch(async (request, _env, _ctx, log) => {\n  log.set({ action: 'handle_request' })\n\n  \u002F\u002F ... your handler logic\n\n  log.emit()\n  return Response.json({ ok: true })\n})\n","src\u002Fworker.ts","typescript",[557,705,706,740,747,760,788,797,802,850,883,888,895,900,913,944],{"__ignoreMap":633},[637,707,708,712,716,720,723,726,729,732,735,737],{"class":639,"line":640},[637,709,711],{"class":710},"s7zQu","import",[637,713,715],{"class":714},"sMK4o"," {",[637,717,719],{"class":718},"sTEyZ"," defineWorkerFetch",[637,721,722],{"class":714},",",[637,724,725],{"class":718}," initWorkersLogger",[637,727,728],{"class":714}," }",[637,730,731],{"class":710}," from",[637,733,734],{"class":714}," '",[637,736,559],{"class":646},[637,738,739],{"class":714},"'\n",[637,741,743],{"class":639,"line":742},2,[637,744,746],{"emptyLinePlaceholder":745},true,"\n",[637,748,750,754,757],{"class":639,"line":749},3,[637,751,753],{"class":752},"s2Zo4","initWorkersLogger",[637,755,756],{"class":718},"(",[637,758,759],{"class":714},"{\n",[637,761,763,767,770,772,775,777,779,782,785],{"class":639,"line":762},4,[637,764,766],{"class":765},"swJcz","  env",[637,768,769],{"class":714},":",[637,771,715],{"class":714},[637,773,774],{"class":765}," service",[637,776,769],{"class":714},[637,778,734],{"class":714},[637,780,781],{"class":646},"my-worker",[637,783,784],{"class":714},"'",[637,786,787],{"class":714}," },\n",[637,789,791,794],{"class":639,"line":790},5,[637,792,793],{"class":714},"}",[637,795,796],{"class":718},")\n",[637,798,800],{"class":639,"line":799},6,[637,801,746],{"emptyLinePlaceholder":745},[637,803,805,808,811,813,815,819,822,826,828,831,833,836,838,841,844,847],{"class":639,"line":804},7,[637,806,807],{"class":710},"export",[637,809,810],{"class":710}," default",[637,812,719],{"class":752},[637,814,756],{"class":718},[637,816,818],{"class":817},"spNyl","async",[637,820,821],{"class":714}," (",[637,823,825],{"class":824},"sHdIc","request",[637,827,722],{"class":714},[637,829,830],{"class":824}," _env",[637,832,722],{"class":714},[637,834,835],{"class":824}," _ctx",[637,837,722],{"class":714},[637,839,840],{"class":824}," log",[637,842,843],{"class":714},")",[637,845,846],{"class":817}," =>",[637,848,849],{"class":714}," {\n",[637,851,853,856,859,862,864,867,870,872,874,877,879,881],{"class":639,"line":852},8,[637,854,855],{"class":718},"  log",[637,857,858],{"class":714},".",[637,860,861],{"class":752},"set",[637,863,756],{"class":765},[637,865,866],{"class":714},"{",[637,868,869],{"class":765}," action",[637,871,769],{"class":714},[637,873,734],{"class":714},[637,875,876],{"class":646},"handle_request",[637,878,784],{"class":714},[637,880,728],{"class":714},[637,882,796],{"class":765},[637,884,886],{"class":639,"line":885},9,[637,887,746],{"emptyLinePlaceholder":745},[637,889,891],{"class":639,"line":890},10,[637,892,894],{"class":893},"sHwdD","  \u002F\u002F ... your handler logic\n",[637,896,898],{"class":639,"line":897},11,[637,899,746],{"emptyLinePlaceholder":745},[637,901,903,905,907,910],{"class":639,"line":902},12,[637,904,855],{"class":718},[637,906,858],{"class":714},[637,908,909],{"class":752},"emit",[637,911,912],{"class":765},"()\n",[637,914,916,919,922,924,927,929,931,934,936,940,942],{"class":639,"line":915},13,[637,917,918],{"class":710},"  return",[637,920,921],{"class":718}," Response",[637,923,858],{"class":714},[637,925,926],{"class":752},"json",[637,928,756],{"class":765},[637,930,866],{"class":714},[637,932,933],{"class":765}," ok",[637,935,769],{"class":714},[637,937,939],{"class":938},"sfNiH"," true",[637,941,728],{"class":714},[637,943,796],{"class":765},[637,945,947,949],{"class":639,"line":946},14,[637,948,793],{"class":714},[637,950,796],{"class":718},[553,952,953,955,956,959,960,963,964,969,970,973,974,977,978,981],{},[557,954,592],{}," passes ",[557,957,958],{},"ExecutionContext"," into ",[557,961,962],{},"createWorkersLogger"," for you, so async ",[590,965,966],{},[557,967,968],{},"drain"," calls (PostHog, Axiom, …) stay alive via ",[557,971,972],{},"waitUntil"," after the response is returned. Use raw ",[557,975,976],{},"export default { fetch }"," + ",[557,979,980],{},"createWorkersLogger(request, { executionCtx: ctx })"," only if you prefer not to use the wrapper.",[553,983,984,986,987,990,991,994,995,998],{},[557,985,962],{}," still auto-extracts ",[557,988,989],{},"method",", ",[557,992,993],{},"path",", and ",[557,996,997],{},"cf-ray"," from the request.",[1000,1001,1003,1004,1006,1007,1011,1012,1014,1015,1017,1018,1021,1022,1025,1026,858],"callout",{"color":1002,"icon":13},"info","You must call ",[557,1005,563],{}," manually before returning a response. Workers don't have a request lifecycle hook to auto-emit. With ",[590,1008,1009],{},[557,1010,592],{},", async ",[557,1013,968],{}," work is tied to ",[557,1016,972],{}," automatically; with a raw ",[557,1019,1020],{},"{ fetch }"," handler, pass ",[557,1023,1024],{},"{ executionCtx: ctx }"," to ",[557,1027,962],{},[615,1029,51],{"id":1030},"wide-events",[553,1032,1033],{},"Build up context progressively, then emit at the end:",[627,1035,1037],{"className":700,"code":1036,"filename":702,"language":703,"meta":633,"style":633},"import { defineWorkerFetch, initWorkersLogger } from 'evlog\u002Fworkers'\n\ninitWorkersLogger({\n  env: { service: 'my-worker' },\n})\n\nexport default defineWorkerFetch(async (request, env, _ctx, log) => {\n  const url = new URL(request.url)\n\n  log.set({ route: url.pathname })\n\n  const user = await env.DB.prepare('SELECT * FROM users WHERE id = ?').bind(url.searchParams.get('userId')).first()\n  log.set({ user: { id: user.id, plan: user.plan } })\n\n  const orders = await env.DB.prepare('SELECT COUNT(*) as count FROM orders WHERE user_id = ?').bind(user.id).first()\n  log.set({ orders: { count: orders.count } })\n\n  log.emit()\n  return Response.json({ user, orders })\n})\n",[557,1038,1039,1061,1065,1073,1093,1099,1103,1138,1166,1170,1198,1202,1275,1325,1329,1383,1420,1425,1436,1461],{"__ignoreMap":633},[637,1040,1041,1043,1045,1047,1049,1051,1053,1055,1057,1059],{"class":639,"line":640},[637,1042,711],{"class":710},[637,1044,715],{"class":714},[637,1046,719],{"class":718},[637,1048,722],{"class":714},[637,1050,725],{"class":718},[637,1052,728],{"class":714},[637,1054,731],{"class":710},[637,1056,734],{"class":714},[637,1058,559],{"class":646},[637,1060,739],{"class":714},[637,1062,1063],{"class":639,"line":742},[637,1064,746],{"emptyLinePlaceholder":745},[637,1066,1067,1069,1071],{"class":639,"line":749},[637,1068,753],{"class":752},[637,1070,756],{"class":718},[637,1072,759],{"class":714},[637,1074,1075,1077,1079,1081,1083,1085,1087,1089,1091],{"class":639,"line":762},[637,1076,766],{"class":765},[637,1078,769],{"class":714},[637,1080,715],{"class":714},[637,1082,774],{"class":765},[637,1084,769],{"class":714},[637,1086,734],{"class":714},[637,1088,781],{"class":646},[637,1090,784],{"class":714},[637,1092,787],{"class":714},[637,1094,1095,1097],{"class":639,"line":790},[637,1096,793],{"class":714},[637,1098,796],{"class":718},[637,1100,1101],{"class":639,"line":799},[637,1102,746],{"emptyLinePlaceholder":745},[637,1104,1105,1107,1109,1111,1113,1115,1117,1119,1121,1124,1126,1128,1130,1132,1134,1136],{"class":639,"line":804},[637,1106,807],{"class":710},[637,1108,810],{"class":710},[637,1110,719],{"class":752},[637,1112,756],{"class":718},[637,1114,818],{"class":817},[637,1116,821],{"class":714},[637,1118,825],{"class":824},[637,1120,722],{"class":714},[637,1122,1123],{"class":824}," env",[637,1125,722],{"class":714},[637,1127,835],{"class":824},[637,1129,722],{"class":714},[637,1131,840],{"class":824},[637,1133,843],{"class":714},[637,1135,846],{"class":817},[637,1137,849],{"class":714},[637,1139,1140,1143,1146,1149,1152,1155,1157,1159,1161,1164],{"class":639,"line":852},[637,1141,1142],{"class":817},"  const",[637,1144,1145],{"class":718}," url",[637,1147,1148],{"class":714}," =",[637,1150,1151],{"class":714}," new",[637,1153,1154],{"class":752}," URL",[637,1156,756],{"class":765},[637,1158,825],{"class":718},[637,1160,858],{"class":714},[637,1162,1163],{"class":718},"url",[637,1165,796],{"class":765},[637,1167,1168],{"class":639,"line":885},[637,1169,746],{"emptyLinePlaceholder":745},[637,1171,1172,1174,1176,1178,1180,1182,1185,1187,1189,1191,1194,1196],{"class":639,"line":890},[637,1173,855],{"class":718},[637,1175,858],{"class":714},[637,1177,861],{"class":752},[637,1179,756],{"class":765},[637,1181,866],{"class":714},[637,1183,1184],{"class":765}," route",[637,1186,769],{"class":714},[637,1188,1145],{"class":718},[637,1190,858],{"class":714},[637,1192,1193],{"class":718},"pathname",[637,1195,728],{"class":714},[637,1197,796],{"class":765},[637,1199,1200],{"class":639,"line":897},[637,1201,746],{"emptyLinePlaceholder":745},[637,1203,1204,1206,1209,1211,1214,1216,1218,1221,1223,1226,1228,1230,1233,1235,1237,1239,1242,1244,1246,1248,1251,1253,1256,1258,1260,1263,1265,1268,1270,1273],{"class":639,"line":902},[637,1205,1142],{"class":817},[637,1207,1208],{"class":718}," user",[637,1210,1148],{"class":714},[637,1212,1213],{"class":710}," await",[637,1215,1123],{"class":718},[637,1217,858],{"class":714},[637,1219,1220],{"class":718},"DB",[637,1222,858],{"class":714},[637,1224,1225],{"class":752},"prepare",[637,1227,756],{"class":765},[637,1229,784],{"class":714},[637,1231,1232],{"class":646},"SELECT * FROM users WHERE id = ?",[637,1234,784],{"class":714},[637,1236,843],{"class":765},[637,1238,858],{"class":714},[637,1240,1241],{"class":752},"bind",[637,1243,756],{"class":765},[637,1245,1163],{"class":718},[637,1247,858],{"class":714},[637,1249,1250],{"class":718},"searchParams",[637,1252,858],{"class":714},[637,1254,1255],{"class":752},"get",[637,1257,756],{"class":765},[637,1259,784],{"class":714},[637,1261,1262],{"class":646},"userId",[637,1264,784],{"class":714},[637,1266,1267],{"class":765},"))",[637,1269,858],{"class":714},[637,1271,1272],{"class":752},"first",[637,1274,912],{"class":765},[637,1276,1277,1279,1281,1283,1285,1287,1289,1291,1293,1296,1298,1300,1302,1305,1307,1310,1312,1314,1316,1319,1321,1323],{"class":639,"line":915},[637,1278,855],{"class":718},[637,1280,858],{"class":714},[637,1282,861],{"class":752},[637,1284,756],{"class":765},[637,1286,866],{"class":714},[637,1288,1208],{"class":765},[637,1290,769],{"class":714},[637,1292,715],{"class":714},[637,1294,1295],{"class":765}," id",[637,1297,769],{"class":714},[637,1299,1208],{"class":718},[637,1301,858],{"class":714},[637,1303,1304],{"class":718},"id",[637,1306,722],{"class":714},[637,1308,1309],{"class":765}," plan",[637,1311,769],{"class":714},[637,1313,1208],{"class":718},[637,1315,858],{"class":714},[637,1317,1318],{"class":718},"plan",[637,1320,728],{"class":714},[637,1322,728],{"class":714},[637,1324,796],{"class":765},[637,1326,1327],{"class":639,"line":946},[637,1328,746],{"emptyLinePlaceholder":745},[637,1330,1332,1334,1337,1339,1341,1343,1345,1347,1349,1351,1353,1355,1358,1360,1362,1364,1366,1368,1371,1373,1375,1377,1379,1381],{"class":639,"line":1331},15,[637,1333,1142],{"class":817},[637,1335,1336],{"class":718}," orders",[637,1338,1148],{"class":714},[637,1340,1213],{"class":710},[637,1342,1123],{"class":718},[637,1344,858],{"class":714},[637,1346,1220],{"class":718},[637,1348,858],{"class":714},[637,1350,1225],{"class":752},[637,1352,756],{"class":765},[637,1354,784],{"class":714},[637,1356,1357],{"class":646},"SELECT COUNT(*) as count FROM orders WHERE user_id = ?",[637,1359,784],{"class":714},[637,1361,843],{"class":765},[637,1363,858],{"class":714},[637,1365,1241],{"class":752},[637,1367,756],{"class":765},[637,1369,1370],{"class":718},"user",[637,1372,858],{"class":714},[637,1374,1304],{"class":718},[637,1376,843],{"class":765},[637,1378,858],{"class":714},[637,1380,1272],{"class":752},[637,1382,912],{"class":765},[637,1384,1386,1388,1390,1392,1394,1396,1398,1400,1402,1405,1407,1409,1411,1414,1416,1418],{"class":639,"line":1385},16,[637,1387,855],{"class":718},[637,1389,858],{"class":714},[637,1391,861],{"class":752},[637,1393,756],{"class":765},[637,1395,866],{"class":714},[637,1397,1336],{"class":765},[637,1399,769],{"class":714},[637,1401,715],{"class":714},[637,1403,1404],{"class":765}," count",[637,1406,769],{"class":714},[637,1408,1336],{"class":718},[637,1410,858],{"class":714},[637,1412,1413],{"class":718},"count",[637,1415,728],{"class":714},[637,1417,728],{"class":714},[637,1419,796],{"class":765},[637,1421,1423],{"class":639,"line":1422},17,[637,1424,746],{"emptyLinePlaceholder":745},[637,1426,1428,1430,1432,1434],{"class":639,"line":1427},18,[637,1429,855],{"class":718},[637,1431,858],{"class":714},[637,1433,909],{"class":752},[637,1435,912],{"class":765},[637,1437,1439,1441,1443,1445,1447,1449,1451,1453,1455,1457,1459],{"class":639,"line":1438},19,[637,1440,918],{"class":710},[637,1442,921],{"class":718},[637,1444,858],{"class":714},[637,1446,926],{"class":752},[637,1448,756],{"class":765},[637,1450,866],{"class":714},[637,1452,1208],{"class":718},[637,1454,722],{"class":714},[637,1456,1336],{"class":718},[637,1458,728],{"class":714},[637,1460,796],{"class":765},[637,1462,1464,1466],{"class":639,"line":1463},20,[637,1465,793],{"class":714},[637,1467,796],{"class":718},[627,1469,1472],{"className":629,"code":1470,"filename":1471,"language":632,"meta":633,"style":633},"14:58:15 INFO [my-worker] GET \u002Fapi\u002Fusers 200 in 12ms\n  ├─ orders: count=5\n  ├─ user: id=usr_123 plan=pro\n  ├─ route: \u002Fapi\u002Fusers\n  └─ requestId: 4a8ff3a8-...\n","Terminal output",[557,1473,1474,1485,1500,1513,1523],{"__ignoreMap":633},[637,1475,1476,1479,1482],{"class":639,"line":640},[637,1477,1478],{"class":643},"14:58:15",[637,1480,1481],{"class":646}," INFO",[637,1483,1484],{"class":718}," [my-worker] GET \u002Fapi\u002Fusers 200 in 12ms\n",[637,1486,1487,1490,1493,1496],{"class":639,"line":742},[637,1488,1489],{"class":643},"  ├─",[637,1491,1492],{"class":646}," orders:",[637,1494,1495],{"class":646}," count=",[637,1497,1499],{"class":1498},"sbssI","5\n",[637,1501,1502,1504,1507,1510],{"class":639,"line":749},[637,1503,1489],{"class":643},[637,1505,1506],{"class":646}," user:",[637,1508,1509],{"class":646}," id=usr_123",[637,1511,1512],{"class":646}," 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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',\n      })\n    }\n\n    log.emit()\n    return Response.json({ success: true })\n  } catch (error) {\n    log.error(error instanceof Error ? error : new Error(String(error)))\n    log.emit()\n\n    const parsed = parseError(error)\n    return Response.json({\n      message: parsed.message,\n      why: parsed.why,\n      fix: parsed.fix,\n    }, { status: parsed.status })\n  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