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Install",[573,574,575,600,614,628],"code-group",{},[576,577,583],"pre",{"className":578,"code":579,"filename":580,"language":581,"meta":582,"style":582},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[459,584,585],{"__ignoreMap":582},[586,587,590,593,597],"span",{"class":588,"line":589},"line",1,[586,591,580],{"class":592},"sBMFI",[586,594,596],{"class":595},"sfazB"," add",[586,598,599],{"class":595}," evlog\n",[576,601,604],{"className":578,"code":602,"filename":603,"language":581,"meta":582,"style":582},"bun add evlog\n","bun",[459,605,606],{"__ignoreMap":582},[586,607,608,610,612],{"class":588,"line":589},[586,609,603],{"class":592},[586,611,596],{"class":595},[586,613,599],{"class":595},[576,615,618],{"className":578,"code":616,"filename":617,"language":581,"meta":582,"style":582},"yarn add evlog\n","yarn",[459,619,620],{"__ignoreMap":582},[586,621,622,624,626],{"class":588,"line":589},[586,623,617],{"class":592},[586,625,596],{"class":595},[586,627,599],{"class":595},[576,629,632],{"className":578,"code":630,"filename":631,"language":581,"meta":582,"style":582},"npm install evlog\n","npm",[459,633,634],{"__ignoreMap":582},[586,635,636,638,641],{"class":588,"line":589},[586,637,631],{"class":592},[586,639,640],{"class":595}," install",[586,642,599],{"class":595},[568,644,646],{"id":645},"_2-initialize-once-log-per-invocation","2. 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finally {\n      log.emit()\n    }\n  }\n}\n","src\u002Fhandler.ts","typescript",[459,654,655,687,714,721,734,783,792,797,829,860,878,896,919,927,932,940,981,988,1017,1034,1079,1106,1115,1125,1138,1144,1150],{"__ignoreMap":582},[586,656,657,661,664,668,672,675,678,681,684],{"class":588,"line":589},[586,658,660],{"class":659},"s7zQu","import",[586,662,663],{"class":659}," type",[586,665,667],{"class":666},"sMK4o"," {",[586,669,671],{"class":670},"sTEyZ"," SQSEvent",[586,673,674],{"class":666}," }",[586,676,677],{"class":659}," from",[586,679,680],{"class":666}," '",[586,682,683],{"class":595},"aws-lambda",[586,685,686],{"class":666},"'\n",[586,688,690,692,694,697,700,703,705,707,709,712],{"class":588,"line":689},2,[586,691,660],{"class":659},[586,693,667],{"class":666},[586,695,696],{"class":670}," initLogger",[586,698,699],{"class":666},",",[586,701,702],{"class":670}," createLogger",[586,704,674],{"class":666},[586,706,677],{"class":659},[586,708,680],{"class":666},[586,710,711],{"class":595},"evlog",[586,713,686],{"class":666},[586,715,717],{"class":588,"line":716},3,[586,718,720],{"emptyLinePlaceholder":719},true,"\n",[586,722,724,728,731],{"class":588,"line":723},4,[586,725,727],{"class":726},"s2Zo4","initLogger",[586,729,730],{"class":670},"(",[586,732,733],{"class":666},"{\n",[586,735,737,741,744,746,749,751,753,756,759,761,764,766,769,772,775,777,780],{"class":588,"line":736},5,[586,738,740],{"class":739},"swJcz","  env",[586,742,743],{"class":666},":",[586,745,667],{"class":666},[586,747,748],{"class":739}," service",[586,750,743],{"class":666},[586,752,680],{"class":666},[586,754,755],{"class":595},"sqs-consumer",[586,757,758],{"class":666},"'",[586,760,699],{"class":666},[586,762,763],{"class":739}," environment",[586,765,743],{"class":666},[586,767,768],{"class":670}," 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(",[586,839,840],{"class":805},"const",[586,842,843],{"class":670}," record",[586,845,846],{"class":666}," of",[586,848,849],{"class":670}," event",[586,851,771],{"class":666},[586,853,854],{"class":670},"Records",[586,856,857],{"class":739},") ",[586,859,733],{"class":666},[586,861,863,866,869,872,874,876],{"class":588,"line":862},10,[586,864,865],{"class":805},"    const",[586,867,868],{"class":670}," log",[586,870,871],{"class":666}," =",[586,873,702],{"class":726},[586,875,730],{"class":739},[586,877,733],{"class":666},[586,879,881,884,886,888,890,893],{"class":588,"line":880},11,[586,882,883],{"class":739},"      messageId",[586,885,743],{"class":666},[586,887,843],{"class":670},[586,889,771],{"class":666},[586,891,892],{"class":670},"messageId",[586,894,895],{"class":666},",\n",[586,897,899,902,904,906,908,911,914,917],{"class":588,"line":898},12,[586,900,901],{"class":739},"      approximateReceiveCount",[586,903,743],{"class":666},[586,905,843],{"class":670},[586,907,771],{"class":666},[586,909,910],{"class":670},"attributes",[586,912,913],{"class":666},"?.",[586,915,916],{"class":670},"ApproximateReceiveCount",[586,918,895],{"class":666},[586,920,922,925],{"class":588,"line":921},13,[586,923,924],{"class":666},"    }",[586,926,791],{"class":739},[586,928,930],{"class":588,"line":929},14,[586,931,720],{"emptyLinePlaceholder":719},[586,933,935,938],{"class":588,"line":934},15,[586,936,937],{"class":659},"    try",[586,939,828],{"class":666},[586,941,943,946,948,951,953,956,959,961,963,966,968,970,972,975,977,979],{"class":588,"line":942},16,[586,944,945],{"class":670},"      log",[586,947,771],{"class":666},[586,949,950],{"class":726},"set",[586,952,730],{"class":739},[586,954,955],{"class":666},"{",[586,957,958],{"class":739}," queue",[586,960,743],{"class":666},[586,962,667],{"class":666},[586,964,965],{"class":739}," name",[586,967,743],{"class":666},[586,969,843],{"class":670},[586,971,771],{"class":666},[586,973,974],{"class":670},"eventSourceARN",[586,976,674],{"class":666},[586,978,674],{"class":666},[586,980,791],{"class":739},[586,982,984],{"class":588,"line":983},17,[586,985,987],{"class":986},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[586,989,991,993,995,997,999,1001,1004,1006,1008,1011,1013,1015],{"class":588,"line":990},18,[586,992,945],{"class":670},[586,994,771],{"class":666},[586,996,950],{"class":726},[586,998,730],{"class":739},[586,1000,955],{"class":666},[586,1002,1003],{"class":739}," status",[586,1005,743],{"class":666},[586,1007,680],{"class":666},[586,1009,1010],{"class":595},"ok",[586,1012,758],{"class":666},[586,1014,674],{"class":666},[586,1016,791],{"class":739},[586,1018,1020,1022,1025,1027,1030,1032],{"class":588,"line":1019},19,[586,1021,924],{"class":666},[586,1023,1024],{"class":659}," catch",[586,1026,837],{"class":739},[586,1028,1029],{"class":670},"error",[586,1031,857],{"class":739},[586,1033,733],{"class":666},[586,1035,1037,1039,1041,1043,1045,1047,1050,1053,1056,1059,1062,1065,1067,1069,1072,1074,1076],{"class":588,"line":1036},20,[586,1038,945],{"class":670},[586,1040,771],{"class":666},[586,1042,1029],{"class":726},[586,1044,730],{"class":739},[586,1046,1029],{"class":670},[586,1048,1049],{"class":666}," instanceof",[586,1051,1052],{"class":592}," Error",[586,1054,1055],{"class":666}," ?",[586,1057,1058],{"class":670}," error",[586,1060,1061],{"class":666}," :",[586,1063,1064],{"class":666}," new",[586,1066,1052],{"class":726},[586,1068,730],{"class":739},[586,1070,1071],{"class":726},"String",[586,1073,730],{"class":739},[586,1075,1029],{"class":670},[586,1077,1078],{"class":739},")))\n",[586,1080,1082,1084,1086,1088,1090,1092,1094,1096,1098,1100,1102,1104],{"class":588,"line":1081},21,[586,1083,945],{"class":670},[586,1085,771],{"class":666},[586,1087,950],{"class":726},[586,1089,730],{"class":739},[586,1091,955],{"class":666},[586,1093,1003],{"class":739},[586,1095,743],{"class":666},[586,1097,680],{"class":666},[586,1099,1029],{"class":595},[586,1101,758],{"class":666},[586,1103,674],{"class":666},[586,1105,791],{"class":739},[586,1107,1109,1112],{"class":588,"line":1108},22,[586,1110,1111],{"class":659},"      throw",[586,1113,1114],{"class":670}," error\n",[586,1116,1118,1120,1123],{"class":588,"line":1117},23,[586,1119,924],{"class":666},[586,1121,1122],{"class":659}," finally",[586,1124,828],{"class":666},[586,1126,1128,1130,1132,1135],{"class":588,"line":1127},24,[586,1129,945],{"class":670},[586,1131,771],{"class":666},[586,1133,1134],{"class":726},"emit",[586,1136,1137],{"class":739},"()\n",[586,1139,1141],{"class":588,"line":1140},25,[586,1142,1143],{"class":666},"    }\n",[586,1145,1147],{"class":588,"line":1146},26,[586,1148,1149],{"class":666},"  }\n",[586,1151,1153],{"class":588,"line":1152},27,[586,1154,1155],{"class":666},"}\n",[445,1157,1158,1159,540,1162,1164],{},"If you process the whole batch as one logical unit, use a ",[449,1160,1161],{},"single",[459,1163,469],{}," per handler invocation with batch metadata instead of one logger per record.",[516,1166,1168,1169],{"id":1167},"stdout-and-silent","Stdout and ",[459,1170,1171],{},"silent",[445,1173,1174,1175,1178,1179,1182,1183,1186,1187,771],{},"Many teams ingest Lambda logs from ",[449,1176,1177],{},"CloudWatch"," via stdout. If you use a ",[449,1180,1181],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[459,1184,1185],{},"silent: true"," in production—see ",[454,1188,414],{"href":1189},"\u002Freference\u002Fconfiguration#silent-mode",[576,1191,1193],{"className":649,"code":1192,"filename":651,"language":652,"meta":582,"style":582},"import { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { initLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'sqs-consumer' },\n  silent: process.env.NODE_ENV === 'production',\n  drain: createAxiomDrain(),\n})\n",[459,1194,1195,1215,1233,1237,1245,1266,1295,1309],{"__ignoreMap":582},[586,1196,1197,1199,1201,1204,1206,1208,1210,1213],{"class":588,"line":589},[586,1198,660],{"class":659},[586,1200,667],{"class":666},[586,1202,1203],{"class":670}," createAxiomDrain",[586,1205,674],{"class":666},[586,1207,677],{"class":659},[586,1209,680],{"class":666},[586,1211,1212],{"class":595},"evlog\u002Faxiom",[586,1214,686],{"class":666},[586,1216,1217,1219,1221,1223,1225,1227,1229,1231],{"class":588,"line":689},[586,1218,660],{"class":659},[586,1220,667],{"class":666},[586,1222,696],{"class":670},[586,1224,674],{"class":666},[586,1226,677],{"class":659},[586,1228,680],{"class":666},[586,1230,711],{"class":595},[586,1232,686],{"class":666},[586,1234,1235],{"class":588,"line":716},[586,1236,720],{"emptyLinePlaceholder":719},[586,1238,1239,1241,1243],{"class":588,"line":723},[586,1240,727],{"class":726},[586,1242,730],{"class":670},[586,1244,733],{"class":666},[586,1246,1247,1249,1251,1253,1255,1257,1259,1261,1263],{"class":588,"line":736},[586,1248,740],{"class":739},[586,1250,743],{"class":666},[586,1252,667],{"class":666},[586,1254,748],{"class":739},[586,1256,743],{"class":666},[586,1258,680],{"class":666},[586,1260,755],{"class":595},[586,1262,758],{"class":666},[586,1264,1265],{"class":666}," },\n",[586,1267,1268,1271,1273,1275,1277,1279,1281,1283,1286,1288,1291,1293],{"class":588,"line":785},[586,1269,1270],{"class":739},"  silent",[586,1272,743],{"class":666},[586,1274,768],{"class":670},[586,1276,771],{"class":666},[586,1278,774],{"class":670},[586,1280,771],{"class":666},[586,1282,779],{"class":670},[586,1284,1285],{"class":666},"===",[586,1287,680],{"class":666},[586,1289,1290],{"class":595},"production",[586,1292,758],{"class":666},[586,1294,895],{"class":666},[586,1296,1297,1300,1302,1304,1307],{"class":588,"line":794},[586,1298,1299],{"class":739},"  drain",[586,1301,743],{"class":666},[586,1303,1203],{"class":726},[586,1305,1306],{"class":670},"()",[586,1308,895],{"class":666},[586,1310,1311,1313],{"class":588,"line":799},[586,1312,788],{"class":666},[586,1314,791],{"class":670},[1316,1317,1320,1321,1323,1324,1327],"callout",{"color":1318,"icon":1319},"warning","i-lucide-alert-triangle","If ",[459,1322,1171],{}," is enabled without a ",[459,1325,1326],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[516,1329,1331],{"id":1330},"error-handling","Error handling",[445,1333,1334,1335,1338,1339,1342,1343,1342,1346,1349],{},"Use ",[459,1336,1337],{},"createError"," where you want structured fields (",[459,1340,1341],{},"why",", ",[459,1344,1345],{},"fix",[459,1347,1348],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct—evlog does not replace AWS error semantics.",[576,1351,1353],{"className":649,"code":1352,"filename":651,"language":652,"meta":582,"style":582},"import { createError } from 'evlog'\n\nthrow createError({\n  message: 'Invalid payload',\n  status: 400,\n  why: 'Required field missing',\n  fix: 'Include orderId in the message body',\n})\n",[459,1354,1355,1374,1378,1389,1405,1418,1434,1450],{"__ignoreMap":582},[586,1356,1357,1359,1361,1364,1366,1368,1370,1372],{"class":588,"line":589},[586,1358,660],{"class":659},[586,1360,667],{"class":666},[586,1362,1363],{"class":670}," createError",[586,1365,674],{"class":666},[586,1367,677],{"class":659},[586,1369,680],{"class":666},[586,1371,711],{"class":595},[586,1373,686],{"class":666},[586,1375,1376],{"class":588,"line":689},[586,1377,720],{"emptyLinePlaceholder":719},[586,1379,1380,1383,1385,1387],{"class":588,"line":716},[586,1381,1382],{"class":659},"throw",[586,1384,1363],{"class":726},[586,1386,730],{"class":670},[586,1388,733],{"class":666},[586,1390,1391,1394,1396,1398,1401,1403],{"class":588,"line":723},[586,1392,1393],{"class":739},"  message",[586,1395,743],{"class":666},[586,1397,680],{"class":666},[586,1399,1400],{"class":595},"Invalid payload",[586,1402,758],{"class":666},[586,1404,895],{"class":666},[586,1406,1407,1410,1412,1416],{"class":588,"line":736},[586,1408,1409],{"class":739},"  status",[586,1411,743],{"class":666},[586,1413,1415],{"class":1414},"sbssI"," 400",[586,1417,895],{"class":666},[586,1419,1420,1423,1425,1427,1430,1432],{"class":588,"line":785},[586,1421,1422],{"class":739},"  why",[586,1424,743],{"class":666},[586,1426,680],{"class":666},[586,1428,1429],{"class":595},"Required field missing",[586,1431,758],{"class":666},[586,1433,895],{"class":666},[586,1435,1436,1439,1441,1443,1446,1448],{"class":588,"line":794},[586,1437,1438],{"class":739},"  fix",[586,1440,743],{"class":666},[586,1442,680],{"class":666},[586,1444,1445],{"class":595},"Include orderId in the message body",[586,1447,758],{"class":666},[586,1449,895],{"class":666},[586,1451,1452,1454],{"class":588,"line":799},[586,1453,788],{"class":666},[586,1455,791],{"class":670},[516,1457,1459],{"id":1458},"related","Related",[484,1461,1462,1477,1491],{},[487,1463,1464,1467,1468,1470,1471,1470,1473,1476],{},[454,1465,1466],{"href":228},"Standalone TypeScript",": same ",[459,1469,727],{}," + ",[459,1472,522],{},[459,1474,1475],{},"emit()"," model",[487,1478,1479,1481,1482,1342,1484,837,1487,1490],{},[454,1480,414],{"href":415},": 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