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The wiring depends on your framework — pick the tab that matches yours; every other example below uses the same shape.",[616,617,618,883,1114,1300],"code-group",{},[619,620,626],"pre",{"className":621,"code":622,"filename":623,"language":624,"meta":625,"style":625},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\nimport type { DrainContext } from 'evlog'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nexport default defineNitroPlugin((nitroApp) => {\n  const pipeline = createDrainPipeline\u003CDrainContext>()\n  const drain = pipeline(createAxiomDrain())\n\n  nitroApp.hooks.hook('evlog:drain', drain)\n  nitroApp.hooks.hook('close', () => drain.flush())\n})\n","Nuxt \u002F Nitro","typescript","",[531,627,628,637,671,691,712,719,750,778,798,803,838,875],{"__ignoreMap":625},[629,630,633],"span",{"class":631,"line":632},"line",1,[629,634,636],{"class":635},"sHwdD","\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\n",[629,638,640,644,647,651,655,658,661,664,668],{"class":631,"line":639},2,[629,641,643],{"class":642},"s7zQu","import",[629,645,646],{"class":642}," type",[629,648,650],{"class":649},"sMK4o"," {",[629,652,654],{"class":653},"sTEyZ"," DrainContext",[629,656,657],{"class":649}," }",[629,659,660],{"class":642}," from",[629,662,663],{"class":649}," '",[629,665,667],{"class":666},"sfazB","evlog",[629,669,670],{"class":649},"'\n",[629,672,674,676,678,681,683,685,687,689],{"class":631,"line":673},3,[629,675,643],{"class":642},[629,677,650],{"class":649},[629,679,680],{"class":653}," createDrainPipeline",[629,682,657],{"class":649},[629,684,660],{"class":642},[629,686,663],{"class":649},[629,688,537],{"class":666},[629,690,670],{"class":649},[629,692,694,696,698,701,703,705,707,710],{"class":631,"line":693},4,[629,695,643],{"class":642},[629,697,650],{"class":649},[629,699,700],{"class":653}," createAxiomDrain",[629,702,657],{"class":649},[629,704,660],{"class":642},[629,706,663],{"class":649},[629,708,709],{"class":666},"evlog\u002Faxiom",[629,711,670],{"class":649},[629,713,715],{"class":631,"line":714},5,[629,716,718],{"emptyLinePlaceholder":717},true,"\n",[629,720,722,725,728,732,735,737,741,743,747],{"class":631,"line":721},6,[629,723,724],{"class":642},"export",[629,726,727],{"class":642}," default",[629,729,731],{"class":730},"s2Zo4"," defineNitroPlugin",[629,733,734],{"class":653},"(",[629,736,734],{"class":649},[629,738,740],{"class":739},"sHdIc","nitroApp",[629,742,591],{"class":649},[629,744,746],{"class":745},"spNyl"," =>",[629,748,749],{"class":649}," {\n",[629,751,753,756,759,762,764,767,771,774],{"class":631,"line":752},7,[629,754,755],{"class":745},"  const",[629,757,758],{"class":653}," pipeline",[629,760,761],{"class":649}," =",[629,763,680],{"class":730},[629,765,766],{"class":649},"\u003C",[629,768,770],{"class":769},"sBMFI","DrainContext",[629,772,773],{"class":649},">",[629,775,777],{"class":776},"swJcz","()\n",[629,779,781,783,786,788,790,792,795],{"class":631,"line":780},8,[629,782,755],{"class":745},[629,784,785],{"class":653}," drain",[629,787,761],{"class":649},[629,789,758],{"class":730},[629,791,734],{"class":776},[629,793,794],{"class":730},"createAxiomDrain",[629,796,797],{"class":776},"())\n",[629,799,801],{"class":631,"line":800},9,[629,802,718],{"emptyLinePlaceholder":717},[629,804,806,809,812,815,817,820,822,825,828,830,833,835],{"class":631,"line":805},10,[629,807,808],{"class":653},"  nitroApp",[629,810,811],{"class":649},".",[629,813,814],{"class":653},"hooks",[629,816,811],{"class":649},[629,818,819],{"class":730},"hook",[629,821,734],{"class":776},[629,823,824],{"class":649},"'",[629,826,827],{"class":666},"evlog:drain",[629,829,824],{"class":649},[629,831,832],{"class":649},",",[629,834,785],{"class":653},[629,836,837],{"class":776},")\n",[629,839,841,843,845,847,849,851,853,855,857,859,861,864,866,868,870,873],{"class":631,"line":840},11,[629,842,808],{"class":653},[629,844,811],{"class":649},[629,846,814],{"class":653},[629,848,811],{"class":649},[629,850,819],{"class":730},[629,852,734],{"class":776},[629,854,824],{"class":649},[629,856,582],{"class":666},[629,858,824],{"class":649},[629,860,832],{"class":649},[629,862,863],{"class":649}," ()",[629,865,746],{"class":745},[629,867,785],{"class":653},[629,869,811],{"class":649},[629,871,872],{"class":730},"flush",[629,874,797],{"class":776},[629,876,878,881],{"class":631,"line":877},12,[629,879,880],{"class":649},"}",[629,882,837],{"class":653},[619,884,886],{"className":621,"code":885,"filename":167,"language":624,"meta":625,"style":625},"\u002F\u002F lib\u002Fevlog.ts\nimport type { DrainContext } from 'evlog'\nimport { createEvlog } from 'evlog\u002Fnext'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nconst pipeline = createDrainPipeline\u003CDrainContext>()\nconst drain = pipeline(createAxiomDrain())\n\nexport const { withEvlog, useLogger, log, createError } = createEvlog({\n  service: 'my-app',\n  drain,\n})\n\nexport const flushEvlog = () => drain.flush()\n",[531,887,888,893,913,933,951,969,973,994,1011,1015,1053,1071,1078,1085,1090],{"__ignoreMap":625},[629,889,890],{"class":631,"line":632},[629,891,892],{"class":635},"\u002F\u002F lib\u002Fevlog.ts\n",[629,894,895,897,899,901,903,905,907,909,911],{"class":631,"line":639},[629,896,643],{"class":642},[629,898,646],{"class":642},[629,900,650],{"class":649},[629,902,654],{"class":653},[629,904,657],{"class":649},[629,906,660],{"class":642},[629,908,663],{"class":649},[629,910,667],{"class":666},[629,912,670],{"class":649},[629,914,915,917,919,922,924,926,928,931],{"class":631,"line":673},[629,916,643],{"class":642},[629,918,650],{"class":649},[629,920,921],{"class":653}," createEvlog",[629,923,657],{"class":649},[629,925,660],{"class":642},[629,927,663],{"class":649},[629,929,930],{"class":666},"evlog\u002Fnext",[629,932,670],{"class":649},[629,934,935,937,939,941,943,945,947,949],{"class":631,"line":693},[629,936,643],{"class":642},[629,938,650],{"class":649},[629,940,680],{"class":653},[629,942,657],{"class":649},[629,944,660],{"class":642},[629,946,663],{"class":649},[629,948,537],{"class":666},[629,950,670],{"class":649},[629,952,953,955,957,959,961,963,965,967],{"class":631,"line":714},[629,954,643],{"class":642},[629,956,650],{"class":649},[629,958,700],{"class":653},[629,960,657],{"class":649},[629,962,660],{"class":642},[629,964,663],{"class":649},[629,966,709],{"class":666},[629,968,670],{"class":649},[629,970,971],{"class":631,"line":721},[629,972,718],{"emptyLinePlaceholder":717},[629,974,975,978,981,984,986,988,990,992],{"class":631,"line":752},[629,976,977],{"class":745},"const",[629,979,980],{"class":653}," pipeline ",[629,982,983],{"class":649},"=",[629,985,680],{"class":730},[629,987,766],{"class":649},[629,989,770],{"class":769},[629,991,773],{"class":649},[629,993,777],{"class":653},[629,995,996,998,1001,1003,1005,1007,1009],{"class":631,"line":780},[629,997,977],{"class":745},[629,999,1000],{"class":653}," drain ",[629,1002,983],{"class":649},[629,1004,758],{"class":730},[629,1006,734],{"class":653},[629,1008,794],{"class":730},[629,1010,797],{"class":653},[629,1012,1013],{"class":631,"line":800},[629,1014,718],{"emptyLinePlaceholder":717},[629,1016,1017,1019,1022,1024,1027,1029,1032,1034,1037,1039,1042,1044,1046,1048,1050],{"class":631,"line":805},[629,1018,724],{"class":642},[629,1020,1021],{"class":745}," const",[629,1023,650],{"class":649},[629,1025,1026],{"class":653}," withEvlog",[629,1028,832],{"class":649},[629,1030,1031],{"class":653}," useLogger",[629,1033,832],{"class":649},[629,1035,1036],{"class":653}," log",[629,1038,832],{"class":649},[629,1040,1041],{"class":653}," createError ",[629,1043,880],{"class":649},[629,1045,761],{"class":649},[629,1047,921],{"class":730},[629,1049,734],{"class":653},[629,1051,1052],{"class":649},"{\n",[629,1054,1055,1058,1061,1063,1066,1068],{"class":631,"line":840},[629,1056,1057],{"class":776},"  service",[629,1059,1060],{"class":649},":",[629,1062,663],{"class":649},[629,1064,1065],{"class":666},"my-app",[629,1067,824],{"class":649},[629,1069,1070],{"class":649},",\n",[629,1072,1073,1076],{"class":631,"line":877},[629,1074,1075],{"class":653},"  drain",[629,1077,1070],{"class":649},[629,1079,1081,1083],{"class":631,"line":1080},13,[629,1082,880],{"class":649},[629,1084,837],{"class":653},[629,1086,1088],{"class":631,"line":1087},14,[629,1089,718],{"emptyLinePlaceholder":717},[629,1091,1093,1095,1097,1100,1102,1104,1106,1108,1110,1112],{"class":631,"line":1092},15,[629,1094,724],{"class":642},[629,1096,1021],{"class":745},[629,1098,1099],{"class":653}," flushEvlog ",[629,1101,983],{"class":649},[629,1103,863],{"class":649},[629,1105,746],{"class":745},[629,1107,785],{"class":653},[629,1109,811],{"class":649},[629,1111,872],{"class":730},[629,1113,777],{"class":653},[619,1115,1118],{"className":621,"code":1116,"filename":1117,"language":624,"meta":625,"style":625},"import type { DrainContext } from 'evlog'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nconst pipeline = createDrainPipeline\u003CDrainContext>()\nconst drain = pipeline(createAxiomDrain())\n\napp.use(evlog({ drain })) \u002F\u002F Hono \u002F Express \u002F Elysia\n\u002F\u002F await app.register(evlog, { drain }) \u002F\u002F Fastify\n\u002F\u002F EvlogModule.forRoot({ drain }) \u002F\u002F NestJS\n\nprocess.on('SIGTERM', () => drain.flush())\n","Hono \u002F Express \u002F Fastify \u002F Elysia \u002F NestJS",[531,1119,1120,1140,1158,1176,1180,1198,1214,1218,1247,1255,1263,1267],{"__ignoreMap":625},[629,1121,1122,1124,1126,1128,1130,1132,1134,1136,1138],{"class":631,"line":632},[629,1123,643],{"class":642},[629,1125,646],{"class":642},[629,1127,650],{"class":649},[629,1129,654],{"class":653},[629,1131,657],{"class":649},[629,1133,660],{"class":642},[629,1135,663],{"class":649},[629,1137,667],{"class":666},[629,1139,670],{"class":649},[629,1141,1142,1144,1146,1148,1150,1152,1154,1156],{"class":631,"line":639},[629,1143,643],{"class":642},[629,1145,650],{"class":649},[629,1147,680],{"class":653},[629,1149,657],{"class":649},[629,1151,660],{"class":642},[629,1153,663],{"class":649},[629,1155,537],{"class":666},[629,1157,670],{"class":649},[629,1159,1160,1162,1164,1166,1168,1170,1172,1174],{"class":631,"line":673},[629,1161,643],{"class":642},[629,1163,650],{"class":649},[629,1165,700],{"class":653},[629,1167,657],{"class":649},[629,1169,660],{"class":642},[629,1171,663],{"class":649},[629,1173,709],{"class":666},[629,1175,670],{"class":649},[629,1177,1178],{"class":631,"line":693},[629,1179,718],{"emptyLinePlaceholder":717},[629,1181,1182,1184,1186,1188,1190,1192,1194,1196],{"class":631,"line":714},[629,1183,977],{"class":745},[629,1185,980],{"class":653},[629,1187,983],{"class":649},[629,1189,680],{"class":730},[629,1191,766],{"class":649},[629,1193,770],{"class":769},[629,1195,773],{"class":649},[629,1197,777],{"class":653},[629,1199,1200,1202,1204,1206,1208,1210,1212],{"class":631,"line":721},[629,1201,977],{"class":745},[629,1203,1000],{"class":653},[629,1205,983],{"class":649},[629,1207,758],{"class":730},[629,1209,734],{"class":653},[629,1211,794],{"class":730},[629,1213,797],{"class":653},[629,1215,1216],{"class":631,"line":752},[629,1217,718],{"emptyLinePlaceholder":717},[629,1219,1220,1223,1225,1228,1230,1232,1234,1237,1239,1241,1244],{"class":631,"line":780},[629,1221,1222],{"class":653},"app",[629,1224,811],{"class":649},[629,1226,1227],{"class":730},"use",[629,1229,734],{"class":653},[629,1231,667],{"class":730},[629,1233,734],{"class":653},[629,1235,1236],{"class":649},"{",[629,1238,1000],{"class":653},[629,1240,880],{"class":649},[629,1242,1243],{"class":653},")) ",[629,1245,1246],{"class":635},"\u002F\u002F Hono \u002F Express \u002F Elysia\n",[629,1248,1249,1252],{"class":631,"line":800},[629,1250,1251],{"class":635},"\u002F\u002F await app.register(evlog, { drain })",[629,1253,1254],{"class":635}," \u002F\u002F Fastify\n",[629,1256,1257,1260],{"class":631,"line":805},[629,1258,1259],{"class":635},"\u002F\u002F EvlogModule.forRoot({ drain })",[629,1261,1262],{"class":635}," \u002F\u002F NestJS\n",[629,1264,1265],{"class":631,"line":840},[629,1266,718],{"emptyLinePlaceholder":717},[629,1268,1269,1272,1274,1277,1279,1281,1284,1286,1288,1290,1292,1294,1296,1298],{"class":631,"line":877},[629,1270,1271],{"class":653},"process",[629,1273,811],{"class":649},[629,1275,1276],{"class":730},"on",[629,1278,734],{"class":653},[629,1280,824],{"class":649},[629,1282,1283],{"class":666},"SIGTERM",[629,1285,824],{"class":649},[629,1287,832],{"class":649},[629,1289,863],{"class":649},[629,1291,746],{"class":745},[629,1293,785],{"class":653},[629,1295,811],{"class":649},[629,1297,872],{"class":730},[629,1299,797],{"class":653},[619,1301,1303],{"className":621,"code":1302,"filename":222,"language":624,"meta":625,"style":625},"\u002F\u002F index.ts — plain TypeScript \u002F Bun \u002F Node script\nimport type { DrainContext } from 'evlog'\nimport { initLogger } from 'evlog'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nconst pipeline = createDrainPipeline\u003CDrainContext>()\nconst drain = pipeline(createAxiomDrain())\n\ninitLogger({ drain })\n\nawait drain.flush() \u002F\u002F before exit\n",[531,1304,1305,1310,1330,1349,1367,1385,1389,1407,1423,1427,1442,1446],{"__ignoreMap":625},[629,1306,1307],{"class":631,"line":632},[629,1308,1309],{"class":635},"\u002F\u002F index.ts — plain TypeScript \u002F Bun \u002F Node script\n",[629,1311,1312,1314,1316,1318,1320,1322,1324,1326,1328],{"class":631,"line":639},[629,1313,643],{"class":642},[629,1315,646],{"class":642},[629,1317,650],{"class":649},[629,1319,654],{"class":653},[629,1321,657],{"class":649},[629,1323,660],{"class":642},[629,1325,663],{"class":649},[629,1327,667],{"class":666},[629,1329,670],{"class":649},[629,1331,1332,1334,1336,1339,1341,1343,1345,1347],{"class":631,"line":673},[629,1333,643],{"class":642},[629,1335,650],{"class":649},[629,1337,1338],{"class":653}," initLogger",[629,1340,657],{"class":649},[629,1342,660],{"class":642},[629,1344,663],{"class":649},[629,1346,667],{"class":666},[629,1348,670],{"class":649},[629,1350,1351,1353,1355,1357,1359,1361,1363,1365],{"class":631,"line":693},[629,1352,643],{"class":642},[629,1354,650],{"class":649},[629,1356,680],{"class":653},[629,1358,657],{"class":649},[629,1360,660],{"class":642},[629,1362,663],{"class":649},[629,1364,537],{"class":666},[629,1366,670],{"class":649},[629,1368,1369,1371,1373,1375,1377,1379,1381,1383],{"class":631,"line":714},[629,1370,643],{"class":642},[629,1372,650],{"class":649},[629,1374,700],{"class":653},[629,1376,657],{"class":649},[629,1378,660],{"class":642},[629,1380,663],{"class":649},[629,1382,709],{"class":666},[629,1384,670],{"class":649},[629,1386,1387],{"class":631,"line":721},[629,1388,718],{"emptyLinePlaceholder":717},[629,1390,1391,1393,1395,1397,1399,1401,1403,1405],{"class":631,"line":752},[629,1392,977],{"class":745},[629,1394,980],{"class":653},[629,1396,983],{"class":649},[629,1398,680],{"class":730},[629,1400,766],{"class":649},[629,1402,770],{"class":769},[629,1404,773],{"class":649},[629,1406,777],{"class":653},[629,1408,1409,1411,1413,1415,1417,1419,1421],{"class":631,"line":780},[629,1410,977],{"class":745},[629,1412,1000],{"class":653},[629,1414,983],{"class":649},[629,1416,758],{"class":730},[629,1418,734],{"class":653},[629,1420,794],{"class":730},[629,1422,797],{"class":653},[629,1424,1425],{"class":631,"line":800},[629,1426,718],{"emptyLinePlaceholder":717},[629,1428,1429,1432,1434,1436,1438,1440],{"class":631,"line":805},[629,1430,1431],{"class":730},"initLogger",[629,1433,734],{"class":653},[629,1435,1236],{"class":649},[629,1437,1000],{"class":653},[629,1439,880],{"class":649},[629,1441,837],{"class":653},[629,1443,1444],{"class":631,"line":840},[629,1445,718],{"emptyLinePlaceholder":717},[629,1447,1448,1451,1453,1455,1457,1460],{"class":631,"line":877},[629,1449,1450],{"class":642},"await",[629,1452,785],{"class":653},[629,1454,811],{"class":649},[629,1456,872],{"class":730},[629,1458,1459],{"class":653},"() ",[629,1461,1462],{"class":635},"\u002F\u002F before exit\n",[1464,1465,1468,1469,1471,1472,1474,1475,1477,1478,811],"callout",{"color":1466,"icon":1467},"warning","i-lucide-alert-triangle","Always flush the pipeline before the process exits (",[531,1470,578],{},"). On Nitro use the ",[531,1473,582],{}," hook; on standalone scripts call it before ",[531,1476,586],{},"; on serverless runtimes use ",[531,1479,590],{},[609,1481,1483],{"id":1482},"how-it-works","How it works",[441,1485,1486,1487,1489,1490,1493,1494,1497,1498,1501,1502,1505,1506,1508],{},"Events are buffered as they arrive on ",[531,1488,827],{},". A batch flushes when either ",[531,1491,1492],{},"batch.size"," is reached or ",[531,1495,1496],{},"batch.intervalMs"," expires (whichever comes first). On failure, the same batch is retried with the configured backoff; once ",[531,1499,1500],{},"retry.maxAttempts"," is exhausted, ",[531,1503,1504],{},"onDropped"," is called with the lost events. The buffer is bounded by ",[531,1507,557],{}," — once full, the oldest events are dropped to keep memory flat.",[609,1510,409],{"id":1511},"configuration",[619,1513,1516],{"className":621,"code":1514,"filename":1515,"language":624,"meta":625,"style":625},"import type { DrainContext } from 'evlog'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nconst pipeline = createDrainPipeline\u003CDrainContext>({\n  batch: {\n    size: 50,          \u002F\u002F Flush every 50 events\n    intervalMs: 5000,  \u002F\u002F Or every 5 seconds, whichever comes first\n  },\n  retry: {\n    maxAttempts: 3,\n    backoff: 'exponential',\n    initialDelayMs: 1000,\n    maxDelayMs: 30000,\n  },\n  maxBufferSize: 1000,\n  onDropped: (events, error) => {\n    console.error(`[evlog] Dropped ${events.length} events:`, error?.message)\n  },\n})\n\nexport const drain = pipeline(createAxiomDrain())\n","pipeline-config.ts",[531,1517,1518,1538,1556,1574,1578,1598,1607,1623,1638,1643,1652,1664,1680,1692,1704,1708,1720,1745,1793,1798,1805,1810],{"__ignoreMap":625},[629,1519,1520,1522,1524,1526,1528,1530,1532,1534,1536],{"class":631,"line":632},[629,1521,643],{"class":642},[629,1523,646],{"class":642},[629,1525,650],{"class":649},[629,1527,654],{"class":653},[629,1529,657],{"class":649},[629,1531,660],{"class":642},[629,1533,663],{"class":649},[629,1535,667],{"class":666},[629,1537,670],{"class":649},[629,1539,1540,1542,1544,1546,1548,1550,1552,1554],{"class":631,"line":639},[629,1541,643],{"class":642},[629,1543,650],{"class":649},[629,1545,680],{"class":653},[629,1547,657],{"class":649},[629,1549,660],{"class":642},[629,1551,663],{"class":649},[629,1553,537],{"class":666},[629,1555,670],{"class":649},[629,1557,1558,1560,1562,1564,1566,1568,1570,1572],{"class":631,"line":673},[629,1559,643],{"class":642},[629,1561,650],{"class":649},[629,1563,700],{"class":653},[629,1565,657],{"class":649},[629,1567,660],{"class":642},[629,1569,663],{"class":649},[629,1571,709],{"class":666},[629,1573,670],{"class":649},[629,1575,1576],{"class":631,"line":693},[629,1577,718],{"emptyLinePlaceholder":717},[629,1579,1580,1582,1584,1586,1588,1590,1592,1594,1596],{"class":631,"line":714},[629,1581,977],{"class":745},[629,1583,980],{"class":653},[629,1585,983],{"class":649},[629,1587,680],{"class":730},[629,1589,766],{"class":649},[629,1591,770],{"class":769},[629,1593,773],{"class":649},[629,1595,734],{"class":653},[629,1597,1052],{"class":649},[629,1599,1600,1603,1605],{"class":631,"line":721},[629,1601,1602],{"class":776},"  batch",[629,1604,1060],{"class":649},[629,1606,749],{"class":649},[629,1608,1609,1612,1614,1618,1620],{"class":631,"line":752},[629,1610,1611],{"class":776},"    size",[629,1613,1060],{"class":649},[629,1615,1617],{"class":1616},"sbssI"," 50",[629,1619,832],{"class":649},[629,1621,1622],{"class":635},"          \u002F\u002F Flush every 50 events\n",[629,1624,1625,1628,1630,1633,1635],{"class":631,"line":780},[629,1626,1627],{"class":776},"    intervalMs",[629,1629,1060],{"class":649},[629,1631,1632],{"class":1616}," 5000",[629,1634,832],{"class":649},[629,1636,1637],{"class":635},"  \u002F\u002F Or every 5 seconds, whichever comes first\n",[629,1639,1640],{"class":631,"line":800},[629,1641,1642],{"class":649},"  },\n",[629,1644,1645,1648,1650],{"class":631,"line":805},[629,1646,1647],{"class":776},"  retry",[629,1649,1060],{"class":649},[629,1651,749],{"class":649},[629,1653,1654,1657,1659,1662],{"class":631,"line":840},[629,1655,1656],{"class":776},"    maxAttempts",[629,1658,1060],{"class":649},[629,1660,1661],{"class":1616}," 3",[629,1663,1070],{"class":649},[629,1665,1666,1669,1671,1673,1676,1678],{"class":631,"line":877},[629,1667,1668],{"class":776},"    backoff",[629,1670,1060],{"class":649},[629,1672,663],{"class":649},[629,1674,1675],{"class":666},"exponential",[629,1677,824],{"class":649},[629,1679,1070],{"class":649},[629,1681,1682,1685,1687,1690],{"class":631,"line":1080},[629,1683,1684],{"class":776},"    initialDelayMs",[629,1686,1060],{"class":649},[629,1688,1689],{"class":1616}," 1000",[629,1691,1070],{"class":649},[629,1693,1694,1697,1699,1702],{"class":631,"line":1087},[629,1695,1696],{"class":776},"    maxDelayMs",[629,1698,1060],{"class":649},[629,1700,1701],{"class":1616}," 30000",[629,1703,1070],{"class":649},[629,1705,1706],{"class":631,"line":1092},[629,1707,1642],{"class":649},[629,1709,1711,1714,1716,1718],{"class":631,"line":1710},16,[629,1712,1713],{"class":776},"  maxBufferSize",[629,1715,1060],{"class":649},[629,1717,1689],{"class":1616},[629,1719,1070],{"class":649},[629,1721,1723,1726,1728,1731,1734,1736,1739,1741,1743],{"class":631,"line":1722},17,[629,1724,1725],{"class":730},"  onDropped",[629,1727,1060],{"class":649},[629,1729,1730],{"class":649}," (",[629,1732,1733],{"class":739},"events",[629,1735,832],{"class":649},[629,1737,1738],{"class":739}," error",[629,1740,591],{"class":649},[629,1742,746],{"class":745},[629,1744,749],{"class":649},[629,1746,1748,1751,1753,1756,1758,1761,1764,1767,1769,1771,1774,1776,1779,1781,1783,1785,1788,1791],{"class":631,"line":1747},18,[629,1749,1750],{"class":653},"    console",[629,1752,811],{"class":649},[629,1754,1755],{"class":730},"error",[629,1757,734],{"class":776},[629,1759,1760],{"class":649},"`",[629,1762,1763],{"class":666},"[evlog] Dropped ",[629,1765,1766],{"class":649},"${",[629,1768,1733],{"class":653},[629,1770,811],{"class":649},[629,1772,1773],{"class":653},"length",[629,1775,880],{"class":649},[629,1777,1778],{"class":666}," events:",[629,1780,1760],{"class":649},[629,1782,832],{"class":649},[629,1784,1738],{"class":653},[629,1786,1787],{"class":649},"?.",[629,1789,1790],{"class":653},"message",[629,1792,837],{"class":776},[629,1794,1796],{"class":631,"line":1795},19,[629,1797,1642],{"class":649},[629,1799,1801,1803],{"class":631,"line":1800},20,[629,1802,880],{"class":649},[629,1804,837],{"class":653},[629,1806,1808],{"class":631,"line":1807},21,[629,1809,718],{"emptyLinePlaceholder":717},[629,1811,1813,1815,1817,1819,1821,1823,1825,1827],{"class":631,"line":1812},22,[629,1814,724],{"class":642},[629,1816,1021],{"class":745},[629,1818,1000],{"class":653},[629,1820,983],{"class":649},[629,1822,758],{"class":730},[629,1824,734],{"class":653},[629,1826,794],{"class":730},[629,1828,797],{"class":653},[1830,1831,1833],"h3",{"id":1832},"options-reference","Options reference",[454,1835,1836,1849],{},[457,1837,1838],{},[460,1839,1840,1843,1846],{},[463,1841,1842],{},"Option",[463,1844,1845],{},"Default",[463,1847,1848],{},"Description",[470,1850,1851,1865,1879,1893,1916,1931,1946,1959],{},[460,1852,1853,1857,1862],{},[475,1854,1855],{},[531,1856,1492],{},[475,1858,1859],{},[531,1860,1861],{},"50",[475,1863,1864],{},"Maximum events per batch",[460,1866,1867,1871,1876],{},[475,1868,1869],{},[531,1870,1496],{},[475,1872,1873],{},[531,1874,1875],{},"5000",[475,1877,1878],{},"Max time (ms) before flushing a partial batch",[460,1880,1881,1885,1890],{},[475,1882,1883],{},[531,1884,1500],{},[475,1886,1887],{},[531,1888,1889],{},"3",[475,1891,1892],{},"Total attempts including the initial one",[460,1894,1895,1900,1905],{},[475,1896,1897],{},[531,1898,1899],{},"retry.backoff",[475,1901,1902],{},[531,1903,1904],{},"'exponential'",[475,1906,1907,1909,1910,1909,1913],{},[531,1908,1904],{}," | ",[531,1911,1912],{},"'linear'",[531,1914,1915],{},"'fixed'",[460,1917,1918,1923,1928],{},[475,1919,1920],{},[531,1921,1922],{},"retry.initialDelayMs",[475,1924,1925],{},[531,1926,1927],{},"1000",[475,1929,1930],{},"Base delay for the first retry",[460,1932,1933,1938,1943],{},[475,1934,1935],{},[531,1936,1937],{},"retry.maxDelayMs",[475,1939,1940],{},[531,1941,1942],{},"30000",[475,1944,1945],{},"Upper bound for any retry delay",[460,1947,1948,1952,1956],{},[475,1949,1950],{},[531,1951,557],{},[475,1953,1954],{},[531,1955,1927],{},[475,1957,1958],{},"Max buffered events before dropping oldest",[460,1960,1961,1965,1968],{},[475,1962,1963],{},[531,1964,1504],{},[475,1966,1967],{},"-",[475,1969,1970],{},"Callback when events are dropped (overflow or retry exhaustion)",[1830,1972,1974],{"id":1973},"backoff-strategies","Backoff strategies",[454,1976,1977,1990],{},[457,1978,1979],{},[460,1980,1981,1984,1987],{},[463,1982,1983],{},"Strategy",[463,1985,1986],{},"Delay pattern",[463,1988,1989],{},"Use case",[470,1991,1992,2004,2017],{},[460,1993,1994,1998,2001],{},[475,1995,1996],{},[531,1997,1675],{},[475,1999,2000],{},"1s, 2s, 4s, 8s…",[475,2002,2003],{},"Default. Best for transient failures that may need time to recover",[460,2005,2006,2011,2014],{},[475,2007,2008],{},[531,2009,2010],{},"linear",[475,2012,2013],{},"1s, 2s, 3s, 4s…",[475,2015,2016],{},"Predictable delay growth",[460,2018,2019,2024,2027],{},[475,2020,2021],{},[531,2022,2023],{},"fixed",[475,2025,2026],{},"1s, 1s, 1s, 1s…",[475,2028,2029],{},"Same delay every time. Useful for rate-limited APIs",[1830,2031,2033],{"id":2032},"returned-drain-function","Returned drain function",[441,2035,2036,2037,2040],{},"The function returned by ",[531,2038,2039],{},"pipeline(drain)"," is hook-compatible and exposes:",[454,2042,2043,2055],{},[457,2044,2045],{},[460,2046,2047,2050,2053],{},[463,2048,2049],{},"Property",[463,2051,2052],{},"Type",[463,2054,1848],{},[470,2056,2057,2072,2086],{},[460,2058,2059,2064,2069],{},[475,2060,2061],{},[531,2062,2063],{},"drain(ctx)",[475,2065,2066],{},[531,2067,2068],{},"(ctx: T) => void",[475,2070,2071],{},"Push a single event into the buffer",[460,2073,2074,2078,2083],{},[475,2075,2076],{},[531,2077,578],{},[475,2079,2080],{},[531,2081,2082],{},"() => Promise\u003Cvoid>",[475,2084,2085],{},"Force-flush all buffered events",[460,2087,2088,2093,2098],{},[475,2089,2090],{},[531,2091,2092],{},"drain.pending",[475,2094,2095],{},[531,2096,2097],{},"number",[475,2099,2100],{},"Number of events currently buffered",[609,2102,494],{"id":2103},"fanout",[2105,2106],"drain-fan-out",{},[441,2108,2109,2110,2113],{},"In production, the same wide event often needs to reach more than one destination: a long-term store (Axiom), a metrics tool (Datadog), an error tracker (Sentry), and a local fs drain for incident replay. The pipeline batches once, then your drain fans out the batch to every destination in parallel via ",[531,2111,2112],{},"Promise.allSettled"," so a single slow \u002F failing destination cannot block the others.",[516,2115,2117,2120,2179],{":actions":518,"description":2116,"icon":397},"Fan out evlog events to multiple destinations",[441,2118,2119],{},"Send each wide event to several destinations in parallel through a single drain pipeline.",[524,2121,2122,2138,2148,2162,2173],{},[527,2123,2124,2125,534,2127,2129,2130,2133,2134,2137],{},"Wrap a single ",[531,2126,533],{},[531,2128,537],{}," around a fan-out function that calls every destination drain inside ",[531,2131,2132],{},"Promise.allSettled([drainA(batch), drainB(batch), …])"," — ",[531,2135,2136],{},"allSettled"," so one failing drain doesn't reject the whole batch",[527,2139,2140,2141,2144,2145,591],{},"Pick destinations by purpose: long-term store (Axiom \u002F Better Stack \u002F Datadog), error tracker (Sentry — typically ",[531,2142,2143],{},"{ minLevel: 'error' }"," so it doesn't get all events), local replay (",[531,2146,2147],{},"createFsDrain",[527,2149,2150,2151,2153,2154,2153,2156,2158,2159,2161],{},"Tune ",[531,2152,1492],{},", ",[531,2155,1496],{},[531,2157,1500],{},", and ",[531,2160,557],{}," once at the pipeline level — applies to all destinations",[527,2163,2164,2165,2168,2169,2172],{},"For destinations that need different filtering, prefer per-drain ",[531,2166,2167],{},"minLevel"," \u002F ",[531,2170,2171],{},"filter"," options over wrapping",[527,2174,2175,2176,2178],{},"Don't forget ",[531,2177,578],{}," on shutdown — events buffered for fanout are lost on abrupt exit",[441,2180,597,2181],{},[445,2182,600],{"href":600,"rel":2183},[602],[1830,2185,2187],{"id":2186},"the-recipe","The recipe",[619,2189,2193],{"className":2190,"code":2191,"language":2192,"meta":625,"style":625},"language-ts shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createDrainPipeline } from 'evlog\u002Fpipeline'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { createDatadogDrain } from 'evlog\u002Fdatadog'\nimport { createSentryDrain } from 'evlog\u002Fsentry'\nimport { createFsDrain } from 'evlog\u002Ffs'\nimport type { DrainContext } from 'evlog'\n\nconst pipeline = createDrainPipeline\u003CDrainContext>({\n  batch: { size: 50, intervalMs: 5000 },\n  retry: { maxAttempts: 3 },\n  maxBufferSize: 1000,\n})\n\nconst axiom = createAxiomDrain()\nconst datadog = createDatadogDrain()\nconst sentry = createSentryDrain({ minLevel: 'error' })\nconst fs = createFsDrain({ dir: '.evlog\u002Flogs', maxFiles: 14 })\n\nexport const drain = pipeline(async (batch) => {\n  await Promise.allSettled([\n    axiom(batch),\n    datadog(batch),\n    sentry(batch),\n    fs(batch),\n  ])\n})\n","ts",[531,2194,2195,2213,2231,2251,2271,2291,2311,2315,2335,2362,2379,2389,2395,2399,2412,2425,2455,2496,2500,2527,2542,2555,2568,2582,2596,2602],{"__ignoreMap":625},[629,2196,2197,2199,2201,2203,2205,2207,2209,2211],{"class":631,"line":632},[629,2198,643],{"class":642},[629,2200,650],{"class":649},[629,2202,680],{"class":653},[629,2204,657],{"class":649},[629,2206,660],{"class":642},[629,2208,663],{"class":649},[629,2210,537],{"class":666},[629,2212,670],{"class":649},[629,2214,2215,2217,2219,2221,2223,2225,2227,2229],{"class":631,"line":639},[629,2216,643],{"class":642},[629,2218,650],{"class":649},[629,2220,700],{"class":653},[629,2222,657],{"class":649},[629,2224,660],{"class":642},[629,2226,663],{"class":649},[629,2228,709],{"class":666},[629,2230,670],{"class":649},[629,2232,2233,2235,2237,2240,2242,2244,2246,2249],{"class":631,"line":673},[629,2234,643],{"class":642},[629,2236,650],{"class":649},[629,2238,2239],{"class":653}," createDatadogDrain",[629,2241,657],{"class":649},[629,2243,660],{"class":642},[629,2245,663],{"class":649},[629,2247,2248],{"class":666},"evlog\u002Fdatadog",[629,2250,670],{"class":649},[629,2252,2253,2255,2257,2260,2262,2264,2266,2269],{"class":631,"line":693},[629,2254,643],{"class":642},[629,2256,650],{"class":649},[629,2258,2259],{"class":653}," createSentryDrain",[629,2261,657],{"class":649},[629,2263,660],{"class":642},[629,2265,663],{"class":649},[629,2267,2268],{"class":666},"evlog\u002Fsentry",[629,2270,670],{"class":649},[629,2272,2273,2275,2277,2280,2282,2284,2286,2289],{"class":631,"line":714},[629,2274,643],{"class":642},[629,2276,650],{"class":649},[629,2278,2279],{"class":653}," createFsDrain",[629,2281,657],{"class":649},[629,2283,660],{"class":642},[629,2285,663],{"class":649},[629,2287,2288],{"class":666},"evlog\u002Ffs",[629,2290,670],{"class":649},[629,2292,2293,2295,2297,2299,2301,2303,2305,2307,2309],{"class":631,"line":721},[629,2294,643],{"class":642},[629,2296,646],{"class":642},[629,2298,650],{"class":649},[629,2300,654],{"class":653},[629,2302,657],{"class":649},[629,2304,660],{"class":642},[629,2306,663],{"class":649},[629,2308,667],{"class":666},[629,2310,670],{"class":649},[629,2312,2313],{"class":631,"line":752},[629,2314,718],{"emptyLinePlaceholder":717},[629,2316,2317,2319,2321,2323,2325,2327,2329,2331,2333],{"class":631,"line":780},[629,2318,977],{"class":745},[629,2320,980],{"class":653},[629,2322,983],{"class":649},[629,2324,680],{"class":730},[629,2326,766],{"class":649},[629,2328,770],{"class":769},[629,2330,773],{"class":649},[629,2332,734],{"class":653},[629,2334,1052],{"class":649},[629,2336,2337,2339,2341,2343,2346,2348,2350,2352,2355,2357,2359],{"class":631,"line":800},[629,2338,1602],{"class":776},[629,2340,1060],{"class":649},[629,2342,650],{"class":649},[629,2344,2345],{"class":776}," size",[629,2347,1060],{"class":649},[629,2349,1617],{"class":1616},[629,2351,832],{"class":649},[629,2353,2354],{"class":776}," intervalMs",[629,2356,1060],{"class":649},[629,2358,1632],{"class":1616},[629,2360,2361],{"class":649}," },\n",[629,2363,2364,2366,2368,2370,2373,2375,2377],{"class":631,"line":805},[629,2365,1647],{"class":776},[629,2367,1060],{"class":649},[629,2369,650],{"class":649},[629,2371,2372],{"class":776}," maxAttempts",[629,2374,1060],{"class":649},[629,2376,1661],{"class":1616},[629,2378,2361],{"class":649},[629,2380,2381,2383,2385,2387],{"class":631,"line":840},[629,2382,1713],{"class":776},[629,2384,1060],{"class":649},[629,2386,1689],{"class":1616},[629,2388,1070],{"class":649},[629,2390,2391,2393],{"class":631,"line":877},[629,2392,880],{"class":649},[629,2394,837],{"class":653},[629,2396,2397],{"class":631,"line":1080},[629,2398,718],{"emptyLinePlaceholder":717},[629,2400,2401,2403,2406,2408,2410],{"class":631,"line":1087},[629,2402,977],{"class":745},[629,2404,2405],{"class":653}," axiom ",[629,2407,983],{"class":649},[629,2409,700],{"class":730},[629,2411,777],{"class":653},[629,2413,2414,2416,2419,2421,2423],{"class":631,"line":1092},[629,2415,977],{"class":745},[629,2417,2418],{"class":653}," datadog ",[629,2420,983],{"class":649},[629,2422,2239],{"class":730},[629,2424,777],{"class":653},[629,2426,2427,2429,2432,2434,2436,2438,2440,2443,2445,2447,2449,2451,2453],{"class":631,"line":1710},[629,2428,977],{"class":745},[629,2430,2431],{"class":653}," sentry ",[629,2433,983],{"class":649},[629,2435,2259],{"class":730},[629,2437,734],{"class":653},[629,2439,1236],{"class":649},[629,2441,2442],{"class":776}," minLevel",[629,2444,1060],{"class":649},[629,2446,663],{"class":649},[629,2448,1755],{"class":666},[629,2450,824],{"class":649},[629,2452,657],{"class":649},[629,2454,837],{"class":653},[629,2456,2457,2459,2462,2464,2466,2468,2470,2473,2475,2477,2480,2482,2484,2487,2489,2492,2494],{"class":631,"line":1722},[629,2458,977],{"class":745},[629,2460,2461],{"class":653}," fs ",[629,2463,983],{"class":649},[629,2465,2279],{"class":730},[629,2467,734],{"class":653},[629,2469,1236],{"class":649},[629,2471,2472],{"class":776}," dir",[629,2474,1060],{"class":649},[629,2476,663],{"class":649},[629,2478,2479],{"class":666},".evlog\u002Flogs",[629,2481,824],{"class":649},[629,2483,832],{"class":649},[629,2485,2486],{"class":776}," maxFiles",[629,2488,1060],{"class":649},[629,2490,2491],{"class":1616}," 14",[629,2493,657],{"class":649},[629,2495,837],{"class":653},[629,2497,2498],{"class":631,"line":1747},[629,2499,718],{"emptyLinePlaceholder":717},[629,2501,2502,2504,2506,2508,2510,2512,2514,2517,2519,2521,2523,2525],{"class":631,"line":1795},[629,2503,724],{"class":642},[629,2505,1021],{"class":745},[629,2507,1000],{"class":653},[629,2509,983],{"class":649},[629,2511,758],{"class":730},[629,2513,734],{"class":653},[629,2515,2516],{"class":745},"async",[629,2518,1730],{"class":649},[629,2520,549],{"class":739},[629,2522,591],{"class":649},[629,2524,746],{"class":745},[629,2526,749],{"class":649},[629,2528,2529,2532,2535,2537,2539],{"class":631,"line":1800},[629,2530,2531],{"class":642},"  await",[629,2533,2534],{"class":769}," Promise",[629,2536,811],{"class":649},[629,2538,2136],{"class":730},[629,2540,2541],{"class":776},"([\n",[629,2543,2544,2547,2549,2551,2553],{"class":631,"line":1807},[629,2545,2546],{"class":730},"    axiom",[629,2548,734],{"class":776},[629,2550,549],{"class":653},[629,2552,591],{"class":776},[629,2554,1070],{"class":649},[629,2556,2557,2560,2562,2564,2566],{"class":631,"line":1812},[629,2558,2559],{"class":730},"    datadog",[629,2561,734],{"class":776},[629,2563,549],{"class":653},[629,2565,591],{"class":776},[629,2567,1070],{"class":649},[629,2569,2571,2574,2576,2578,2580],{"class":631,"line":2570},23,[629,2572,2573],{"class":730},"    sentry",[629,2575,734],{"class":776},[629,2577,549],{"class":653},[629,2579,591],{"class":776},[629,2581,1070],{"class":649},[629,2583,2585,2588,2590,2592,2594],{"class":631,"line":2584},24,[629,2586,2587],{"class":730},"    fs",[629,2589,734],{"class":776},[629,2591,549],{"class":653},[629,2593,591],{"class":776},[629,2595,1070],{"class":649},[629,2597,2599],{"class":631,"line":2598},25,[629,2600,2601],{"class":776},"  ])\n",[629,2603,2605,2607],{"class":631,"line":2604},26,[629,2606,880],{"class":649},[629,2608,837],{"class":653},[1830,2610,2612],{"id":2611},"what-you-get","What you get",[524,2614,2615,2624,2630],{},[527,2616,2617,2621,2622],{},[2618,2619,2620],"strong",{},"Parallel dispatch"," — every destination receives the batch concurrently via ",[531,2623,2112],{},[527,2625,2626,2629],{},[2618,2627,2628],{},"Tolerant fanout"," — if Datadog's API throws, Axiom \u002F Sentry \u002F fs still complete; the pipeline only retries the whole batch when the wrapping function rejects",[527,2631,2632,2635],{},[2618,2633,2634],{},"Shared backpressure"," — the buffer is sized once for the whole pipeline; if the wrapping drain falls behind, the oldest events are dropped consistently for every destination",[1830,2637,2639],{"id":2638},"per-drain-filtering","Per-drain filtering",[441,2641,2642],{},"Wrap a destination drain so it only sees events you care about:",[619,2644,2646],{"className":2190,"code":2645,"language":2192,"meta":625,"style":625},"import type { DrainContext } from 'evlog'\n\nconst sentry = createSentryDrain({ dsn: process.env.SENTRY_DSN! })\n\nasync function sentryErrorsOnly(batch: DrainContext[]): Promise\u003Cvoid> {\n  const errors = batch.filter(c => c.event?.level === 'error')\n  if (errors.length > 0) await sentry(errors)\n}\n\nexport const drain = pipeline(async (batch) => {\n  await Promise.allSettled([\n    axiom(batch),\n    sentryErrorsOnly(batch),\n  ])\n})\n",[531,2647,2648,2668,2672,2711,2715,2750,2797,2831,2836,2840,2866,2878,2890,2903,2907],{"__ignoreMap":625},[629,2649,2650,2652,2654,2656,2658,2660,2662,2664,2666],{"class":631,"line":632},[629,2651,643],{"class":642},[629,2653,646],{"class":642},[629,2655,650],{"class":649},[629,2657,654],{"class":653},[629,2659,657],{"class":649},[629,2661,660],{"class":642},[629,2663,663],{"class":649},[629,2665,667],{"class":666},[629,2667,670],{"class":649},[629,2669,2670],{"class":631,"line":639},[629,2671,718],{"emptyLinePlaceholder":717},[629,2673,2674,2676,2678,2680,2682,2684,2686,2689,2691,2694,2696,2699,2701,2704,2707,2709],{"class":631,"line":673},[629,2675,977],{"class":745},[629,2677,2431],{"class":653},[629,2679,983],{"class":649},[629,2681,2259],{"class":730},[629,2683,734],{"class":653},[629,2685,1236],{"class":649},[629,2687,2688],{"class":776}," dsn",[629,2690,1060],{"class":649},[629,2692,2693],{"class":653}," process",[629,2695,811],{"class":649},[629,2697,2698],{"class":653},"env",[629,2700,811],{"class":649},[629,2702,2703],{"class":653},"SENTRY_DSN",[629,2705,2706],{"class":649},"!",[629,2708,657],{"class":649},[629,2710,837],{"class":653},[629,2712,2713],{"class":631,"line":693},[629,2714,718],{"emptyLinePlaceholder":717},[629,2716,2717,2719,2722,2725,2727,2729,2731,2733,2736,2739,2741,2743,2746,2748],{"class":631,"line":714},[629,2718,2516],{"class":745},[629,2720,2721],{"class":745}," function",[629,2723,2724],{"class":730}," sentryErrorsOnly",[629,2726,734],{"class":649},[629,2728,549],{"class":739},[629,2730,1060],{"class":649},[629,2732,654],{"class":769},[629,2734,2735],{"class":653},"[]",[629,2737,2738],{"class":649},"):",[629,2740,2534],{"class":769},[629,2742,766],{"class":649},[629,2744,2745],{"class":769},"void",[629,2747,773],{"class":649},[629,2749,749],{"class":649},[629,2751,2752,2754,2757,2759,2762,2764,2766,2768,2771,2773,2776,2778,2781,2783,2786,2789,2791,2793,2795],{"class":631,"line":721},[629,2753,755],{"class":745},[629,2755,2756],{"class":653}," errors",[629,2758,761],{"class":649},[629,2760,2761],{"class":653}," batch",[629,2763,811],{"class":649},[629,2765,2171],{"class":730},[629,2767,734],{"class":776},[629,2769,2770],{"class":739},"c",[629,2772,746],{"class":745},[629,2774,2775],{"class":653}," c",[629,2777,811],{"class":649},[629,2779,2780],{"class":653},"event",[629,2782,1787],{"class":649},[629,2784,2785],{"class":653},"level",[629,2787,2788],{"class":649}," ===",[629,2790,663],{"class":649},[629,2792,1755],{"class":666},[629,2794,824],{"class":649},[629,2796,837],{"class":776},[629,2798,2799,2802,2804,2807,2809,2811,2814,2817,2820,2822,2825,2827,2829],{"class":631,"line":752},[629,2800,2801],{"class":642},"  if",[629,2803,1730],{"class":776},[629,2805,2806],{"class":653},"errors",[629,2808,811],{"class":649},[629,2810,1773],{"class":653},[629,2812,2813],{"class":649}," >",[629,2815,2816],{"class":1616}," 0",[629,2818,2819],{"class":776},") ",[629,2821,1450],{"class":642},[629,2823,2824],{"class":730}," sentry",[629,2826,734],{"class":776},[629,2828,2806],{"class":653},[629,2830,837],{"class":776},[629,2832,2833],{"class":631,"line":780},[629,2834,2835],{"class":649},"}\n",[629,2837,2838],{"class":631,"line":800},[629,2839,718],{"emptyLinePlaceholder":717},[629,2841,2842,2844,2846,2848,2850,2852,2854,2856,2858,2860,2862,2864],{"class":631,"line":805},[629,2843,724],{"class":642},[629,2845,1021],{"class":745},[629,2847,1000],{"class":653},[629,2849,983],{"class":649},[629,2851,758],{"class":730},[629,2853,734],{"class":653},[629,2855,2516],{"class":745},[629,2857,1730],{"class":649},[629,2859,549],{"class":739},[629,2861,591],{"class":649},[629,2863,746],{"class":745},[629,2865,749],{"class":649},[629,2867,2868,2870,2872,2874,2876],{"class":631,"line":840},[629,2869,2531],{"class":642},[629,2871,2534],{"class":769},[629,2873,811],{"class":649},[629,2875,2136],{"class":730},[629,2877,2541],{"class":776},[629,2879,2880,2882,2884,2886,2888],{"class":631,"line":877},[629,2881,2546],{"class":730},[629,2883,734],{"class":776},[629,2885,549],{"class":653},[629,2887,591],{"class":776},[629,2889,1070],{"class":649},[629,2891,2892,2895,2897,2899,2901],{"class":631,"line":1080},[629,2893,2894],{"class":730},"    sentryErrorsOnly",[629,2896,734],{"class":776},[629,2898,549],{"class":653},[629,2900,591],{"class":776},[629,2902,1070],{"class":649},[629,2904,2905],{"class":631,"line":1087},[629,2906,2601],{"class":776},[629,2908,2909,2911],{"class":631,"line":1092},[629,2910,880],{"class":649},[629,2912,837],{"class":653},[441,2914,2915,2916,2918],{},"Most built-in drains expose ",[531,2917,2167],{}," directly, so you only need this pattern for non-level filters (path, custom field, etc.).",[609,2920,2922],{"id":2921},"custom-drain-function","Custom drain function",[441,2924,2925],{},"You don't need an adapter. Pass any async function that accepts a batch:",[619,2927,2930],{"className":621,"code":2928,"filename":2929,"language":624,"meta":625,"style":625},"import type { DrainContext } from 'evlog'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\n\nconst pipeline = createDrainPipeline\u003CDrainContext>({ batch: { size: 100 } })\n\nexport const drain = pipeline(async (batch) => {\n  await fetch('https:\u002F\u002Fyour-service.com\u002Flogs', {\n    method: 'POST',\n    headers: { 'Content-Type': 'application\u002Fjson' },\n    body: JSON.stringify(batch.map(ctx => ctx.event)),\n  })\n})\n","pipeline-custom.ts",[531,2931,2932,2952,2970,2974,3013,3017,3043,3063,3079,3106,3149,3156],{"__ignoreMap":625},[629,2933,2934,2936,2938,2940,2942,2944,2946,2948,2950],{"class":631,"line":632},[629,2935,643],{"class":642},[629,2937,646],{"class":642},[629,2939,650],{"class":649},[629,2941,654],{"class":653},[629,2943,657],{"class":649},[629,2945,660],{"class":642},[629,2947,663],{"class":649},[629,2949,667],{"class":666},[629,2951,670],{"class":649},[629,2953,2954,2956,2958,2960,2962,2964,2966,2968],{"class":631,"line":639},[629,2955,643],{"class":642},[629,2957,650],{"class":649},[629,2959,680],{"class":653},[629,2961,657],{"class":649},[629,2963,660],{"class":642},[629,2965,663],{"class":649},[629,2967,537],{"class":666},[629,2969,670],{"class":649},[629,2971,2972],{"class":631,"line":673},[629,2973,718],{"emptyLinePlaceholder":717},[629,2975,2976,2978,2980,2982,2984,2986,2988,2990,2992,2994,2996,2998,3000,3002,3004,3007,3009,3011],{"class":631,"line":693},[629,2977,977],{"class":745},[629,2979,980],{"class":653},[629,2981,983],{"class":649},[629,2983,680],{"class":730},[629,2985,766],{"class":649},[629,2987,770],{"class":769},[629,2989,773],{"class":649},[629,2991,734],{"class":653},[629,2993,1236],{"class":649},[629,2995,2761],{"class":776},[629,2997,1060],{"class":649},[629,2999,650],{"class":649},[629,3001,2345],{"class":776},[629,3003,1060],{"class":649},[629,3005,3006],{"class":1616}," 100",[629,3008,657],{"class":649},[629,3010,657],{"class":649},[629,3012,837],{"class":653},[629,3014,3015],{"class":631,"line":714},[629,3016,718],{"emptyLinePlaceholder":717},[629,3018,3019,3021,3023,3025,3027,3029,3031,3033,3035,3037,3039,3041],{"class":631,"line":721},[629,3020,724],{"class":642},[629,3022,1021],{"class":745},[629,3024,1000],{"class":653},[629,3026,983],{"class":649},[629,3028,758],{"class":730},[629,3030,734],{"class":653},[629,3032,2516],{"class":745},[629,3034,1730],{"class":649},[629,3036,549],{"class":739},[629,3038,591],{"class":649},[629,3040,746],{"class":745},[629,3042,749],{"class":649},[629,3044,3045,3047,3050,3052,3054,3057,3059,3061],{"class":631,"line":752},[629,3046,2531],{"class":642},[629,3048,3049],{"class":730}," fetch",[629,3051,734],{"class":776},[629,3053,824],{"class":649},[629,3055,3056],{"class":666},"https:\u002F\u002Fyour-service.com\u002Flogs",[629,3058,824],{"class":649},[629,3060,832],{"class":649},[629,3062,749],{"class":649},[629,3064,3065,3068,3070,3072,3075,3077],{"class":631,"line":780},[629,3066,3067],{"class":776},"    method",[629,3069,1060],{"class":649},[629,3071,663],{"class":649},[629,3073,3074],{"class":666},"POST",[629,3076,824],{"class":649},[629,3078,1070],{"class":649},[629,3080,3081,3084,3086,3088,3090,3093,3095,3097,3099,3102,3104],{"class":631,"line":800},[629,3082,3083],{"class":776},"    headers",[629,3085,1060],{"class":649},[629,3087,650],{"class":649},[629,3089,663],{"class":649},[629,3091,3092],{"class":776},"Content-Type",[629,3094,824],{"class":649},[629,3096,1060],{"class":649},[629,3098,663],{"class":649},[629,3100,3101],{"class":666},"application\u002Fjson",[629,3103,824],{"class":649},[629,3105,2361],{"class":649},[629,3107,3108,3111,3113,3116,3118,3121,3123,3125,3127,3130,3132,3135,3137,3140,3142,3144,3147],{"class":631,"line":805},[629,3109,3110],{"class":776},"    body",[629,3112,1060],{"class":649},[629,3114,3115],{"class":653}," JSON",[629,3117,811],{"class":649},[629,3119,3120],{"class":730},"stringify",[629,3122,734],{"class":776},[629,3124,549],{"class":653},[629,3126,811],{"class":649},[629,3128,3129],{"class":730},"map",[629,3131,734],{"class":776},[629,3133,3134],{"class":739},"ctx",[629,3136,746],{"class":745},[629,3138,3139],{"class":653}," ctx",[629,3141,811],{"class":649},[629,3143,2780],{"class":653},[629,3145,3146],{"class":776},"))",[629,3148,1070],{"class":649},[629,3150,3151,3154],{"class":631,"line":840},[629,3152,3153],{"class":649},"  }",[629,3155,837],{"class":776},[629,3157,3158,3160],{"class":631,"line":877},[629,3159,880],{"class":649},[629,3161,837],{"class":653},[441,3163,3164,3165,3170],{},"For anything more involved (config resolution, retries, identity headers), use ",[445,3166,3167],{"href":395},[531,3168,3169],{},"defineHttpDrain"," instead and let the toolkit handle the boilerplate.",[609,3172,504],{"id":3173},"http-drain-browser-to-server",[441,3175,3176,3177,3180,3181,3184,3185,3188],{},"The HTTP drain is a framework-agnostic transport for shipping client-side logs to your server. It composes on top of the same pipeline primitives, with browser-specific defaults (",[531,3178,3179],{},"fetch keepalive"," + ",[531,3182,3183],{},"sendBeacon"," on ",[531,3186,3187],{},"visibilitychange",").",[1464,3190,3192,3193,3196,3197,3200,3201,3204,3205,3208,3209,3211],{"color":3191,"icon":13},"neutral","The ",[531,3194,3195],{},"evlog\u002Fbrowser"," import path is ",[2618,3198,3199],{},"deprecated"," and re-exports the same API as ",[531,3202,3203],{},"evlog\u002Fhttp",". It will be removed in the next ",[2618,3206,3207],{},"major"," release. Prefer ",[531,3210,3203],{}," for new code.",[516,3213,3216,3219,3268],{":actions":518,"description":3214,"icon":3215},"Set up the HTTP transport for client logs","i-lucide-globe",[441,3217,3218],{},"Set up the HTTP transport so my browser logs are sent to my server.",[524,3220,3221,3224,3235,3245,3252,3261],{},[527,3222,3223],{},"Install evlog: pnpm add evlog",[527,3225,529,3226,534,3229,3231,3232,3234],{},[531,3227,3228],{},"createHttpLogDrain",[531,3230,3203],{}," (NOT ",[531,3233,3195],{}," — that's deprecated)",[527,3236,3237,3238,3241,3242,591],{},"Create a drain with ",[531,3239,3240],{},"{ endpoint: 'https:\u002F\u002Flogs.example.com\u002Fv1\u002Fingest' }"," and an optional pipeline (",[531,3243,3244],{},"{ batch: { size, intervalMs } }",[527,3246,3247,3248,3251],{},"Pass the drain to ",[531,3249,3250],{},"initLogger({ drain })"," on the client side",[527,3253,3254,3255,3180,3257,3184,3259],{},"The drain batches events and uses ",[531,3256,3179],{},[531,3258,3183],{},[531,3260,3187],{},[527,3262,3263,3264,3267],{},"On the server, accept POST requests with a ",[531,3265,3266],{},"DrainContext[]"," body and forward them to my drain pipeline",[441,3269,597,3270],{},[445,3271,600],{"href":600,"rel":3272},[602],[1830,3274,483],{"id":3275},"quick-start-1",[619,3277,3280],{"className":621,"code":3278,"filename":3279,"language":624,"meta":625,"style":625},"import { initLogger, log } from 'evlog'\nimport { createHttpLogDrain } from 'evlog\u002Fhttp'\n\nconst drain = createHttpLogDrain({\n  drain: { endpoint: 'https:\u002F\u002Flogs.example.com\u002Fv1\u002Fingest' },\n})\ninitLogger({ drain })\n\nlog.info({ action: 'page_view', path: location.pathname })\n","app.ts",[531,3281,3282,3304,3323,3327,3341,3363,3369,3383,3387],{"__ignoreMap":625},[629,3283,3284,3286,3288,3290,3292,3294,3296,3298,3300,3302],{"class":631,"line":632},[629,3285,643],{"class":642},[629,3287,650],{"class":649},[629,3289,1338],{"class":653},[629,3291,832],{"class":649},[629,3293,1036],{"class":653},[629,3295,657],{"class":649},[629,3297,660],{"class":642},[629,3299,663],{"class":649},[629,3301,667],{"class":666},[629,3303,670],{"class":649},[629,3305,3306,3308,3310,3313,3315,3317,3319,3321],{"class":631,"line":639},[629,3307,643],{"class":642},[629,3309,650],{"class":649},[629,3311,3312],{"class":653}," createHttpLogDrain",[629,3314,657],{"class":649},[629,3316,660],{"class":642},[629,3318,663],{"class":649},[629,3320,3203],{"class":666},[629,3322,670],{"class":649},[629,3324,3325],{"class":631,"line":673},[629,3326,718],{"emptyLinePlaceholder":717},[629,3328,3329,3331,3333,3335,3337,3339],{"class":631,"line":693},[629,3330,977],{"class":745},[629,3332,1000],{"class":653},[629,3334,983],{"class":649},[629,3336,3312],{"class":730},[629,3338,734],{"class":653},[629,3340,1052],{"class":649},[629,3342,3343,3345,3347,3349,3352,3354,3356,3359,3361],{"class":631,"line":714},[629,3344,1075],{"class":776},[629,3346,1060],{"class":649},[629,3348,650],{"class":649},[629,3350,3351],{"class":776}," endpoint",[629,3353,1060],{"class":649},[629,3355,663],{"class":649},[629,3357,3358],{"class":666},"https:\u002F\u002Flogs.example.com\u002Fv1\u002Fingest",[629,3360,824],{"class":649},[629,3362,2361],{"class":649},[629,3364,3365,3367],{"class":631,"line":721},[629,3366,880],{"class":649},[629,3368,837],{"class":653},[629,3370,3371,3373,3375,3377,3379,3381],{"class":631,"line":752},[629,3372,1431],{"class":730},[629,3374,734],{"class":653},[629,3376,1236],{"class":649},[629,3378,1000],{"class":653},[629,3380,880],{"class":649},[629,3382,837],{"class":653},[629,3384,3385],{"class":631,"line":780},[629,3386,718],{"emptyLinePlaceholder":717},[629,3388,3389,3392,3394,3397,3399,3401,3404,3406,3408,3411,3413,3415,3418,3420,3423,3425,3428,3430],{"class":631,"line":800},[629,3390,3391],{"class":653},"log",[629,3393,811],{"class":649},[629,3395,3396],{"class":730},"info",[629,3398,734],{"class":653},[629,3400,1236],{"class":649},[629,3402,3403],{"class":776}," action",[629,3405,1060],{"class":649},[629,3407,663],{"class":649},[629,3409,3410],{"class":666},"page_view",[629,3412,824],{"class":649},[629,3414,832],{"class":649},[629,3416,3417],{"class":776}," path",[629,3419,1060],{"class":649},[629,3421,3422],{"class":653}," location",[629,3424,811],{"class":649},[629,3426,3427],{"class":653},"pathname ",[629,3429,880],{"class":649},[629,3431,837],{"class":653},[1830,3433,3435],{"id":3434},"how-it-works-browser-specifics","How it works (browser specifics)",[3437,3438,3439,3451,3454,3465,3472],"ol",{},[527,3440,3441,2168,3444,2168,3447,3450],{},[531,3442,3443],{},"log.info()",[531,3445,3446],{},"log.warn()",[531,3448,3449],{},"log.error()"," push events into a memory buffer",[527,3452,3453],{},"Events are batched by size (default 25) or time interval (default 2 s)",[527,3455,3456,3457,3460,3461,3464],{},"Batches are sent via ",[531,3458,3459],{},"fetch"," with ",[531,3462,3463],{},"keepalive: true"," so requests survive page navigation",[527,3466,3467,3468,3471],{},"When the page becomes hidden (tab switch, navigation), buffered events are flushed via ",[531,3469,3470],{},"navigator.sendBeacon"," as a fallback",[527,3473,3474,3475,3477],{},"Your server endpoint receives a ",[531,3476,3266],{}," JSON array and processes it however you like",[1830,3479,3481],{"id":3480},"two-tier-api","Two-tier API",[3483,3484,3486],"h4",{"id":3485},"createhttplogdrainoptions",[531,3487,3488],{},"createHttpLogDrain(options)",[441,3490,3491,3492,3494,3495,3498,3499,811],{},"High-level, pre-composed: creates a pipeline with batching, retry, and auto-flush on ",[531,3493,3187],{},". Returns a ",[531,3496,3497],{},"PipelineDrainFn\u003CDrainContext>"," directly usable with ",[531,3500,3250],{},[619,3502,3504],{"className":621,"code":3503,"filename":3279,"language":624,"meta":625,"style":625},"import { initLogger, log } from 'evlog'\nimport { createHttpLogDrain } from 'evlog\u002Fhttp'\n\nconst drain = createHttpLogDrain({\n  drain: { endpoint: 'https:\u002F\u002Flogs.example.com\u002Fv1\u002Fingest' },\n  pipeline: { batch: { size: 50, intervalMs: 5000 } },\n})\n\ninitLogger({ drain })\nlog.info({ action: 'click', target: 'buy-button' })\n",[531,3505,3506,3528,3546,3550,3564,3584,3617,3623,3627,3641],{"__ignoreMap":625},[629,3507,3508,3510,3512,3514,3516,3518,3520,3522,3524,3526],{"class":631,"line":632},[629,3509,643],{"class":642},[629,3511,650],{"class":649},[629,3513,1338],{"class":653},[629,3515,832],{"class":649},[629,3517,1036],{"class":653},[629,3519,657],{"class":649},[629,3521,660],{"class":642},[629,3523,663],{"class":649},[629,3525,667],{"class":666},[629,3527,670],{"class":649},[629,3529,3530,3532,3534,3536,3538,3540,3542,3544],{"class":631,"line":639},[629,3531,643],{"class":642},[629,3533,650],{"class":649},[629,3535,3312],{"class":653},[629,3537,657],{"class":649},[629,3539,660],{"class":642},[629,3541,663],{"class":649},[629,3543,3203],{"class":666},[629,3545,670],{"class":649},[629,3547,3548],{"class":631,"line":673},[629,3549,718],{"emptyLinePlaceholder":717},[629,3551,3552,3554,3556,3558,3560,3562],{"class":631,"line":693},[629,3553,977],{"class":745},[629,3555,1000],{"class":653},[629,3557,983],{"class":649},[629,3559,3312],{"class":730},[629,3561,734],{"class":653},[629,3563,1052],{"class":649},[629,3565,3566,3568,3570,3572,3574,3576,3578,3580,3582],{"class":631,"line":714},[629,3567,1075],{"class":776},[629,3569,1060],{"class":649},[629,3571,650],{"class":649},[629,3573,3351],{"class":776},[629,3575,1060],{"class":649},[629,3577,663],{"class":649},[629,3579,3358],{"class":666},[629,3581,824],{"class":649},[629,3583,2361],{"class":649},[629,3585,3586,3589,3591,3593,3595,3597,3599,3601,3603,3605,3607,3609,3611,3613,3615],{"class":631,"line":721},[629,3587,3588],{"class":776},"  pipeline",[629,3590,1060],{"class":649},[629,3592,650],{"class":649},[629,3594,2761],{"class":776},[629,3596,1060],{"class":649},[629,3598,650],{"class":649},[629,3600,2345],{"class":776},[629,3602,1060],{"class":649},[629,3604,1617],{"class":1616},[629,3606,832],{"class":649},[629,3608,2354],{"class":776},[629,3610,1060],{"class":649},[629,3612,1632],{"class":1616},[629,3614,657],{"class":649},[629,3616,2361],{"class":649},[629,3618,3619,3621],{"class":631,"line":752},[629,3620,880],{"class":649},[629,3622,837],{"class":653},[629,3624,3625],{"class":631,"line":780},[629,3626,718],{"emptyLinePlaceholder":717},[629,3628,3629,3631,3633,3635,3637,3639],{"class":631,"line":800},[629,3630,1431],{"class":730},[629,3632,734],{"class":653},[629,3634,1236],{"class":649},[629,3636,1000],{"class":653},[629,3638,880],{"class":649},[629,3640,837],{"class":653},[629,3642,3643,3645,3647,3649,3651,3653,3655,3657,3659,3662,3664,3666,3669,3671,3673,3676,3678,3680],{"class":631,"line":805},[629,3644,3391],{"class":653},[629,3646,811],{"class":649},[629,3648,3396],{"class":730},[629,3650,734],{"class":653},[629,3652,1236],{"class":649},[629,3654,3403],{"class":776},[629,3656,1060],{"class":649},[629,3658,663],{"class":649},[629,3660,3661],{"class":666},"click",[629,3663,824],{"class":649},[629,3665,832],{"class":649},[629,3667,3668],{"class":776}," target",[629,3670,1060],{"class":649},[629,3672,663],{"class":649},[629,3674,3675],{"class":666},"buy-button",[629,3677,824],{"class":649},[629,3679,657],{"class":649},[629,3681,837],{"class":653},[3483,3683,3685],{"id":3684},"createhttpdrainconfig",[531,3686,3687],{},"createHttpDrain(config)",[441,3689,3690],{},"Low-level transport function. Use this when you want full control over the pipeline configuration:",[619,3692,3694],{"className":621,"code":3693,"filename":3279,"language":624,"meta":625,"style":625},"import { createHttpDrain } from 'evlog\u002Fhttp'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\nimport type { DrainContext } from 'evlog'\n\nconst transport = createHttpDrain({\n  endpoint: 'https:\u002F\u002Flogs.example.com\u002Fv1\u002Fingest',\n})\nconst pipeline = createDrainPipeline\u003CDrainContext>({\n  batch: { size: 100, intervalMs: 10000 },\n  retry: { maxAttempts: 5 },\n})\n\nconst drain = pipeline(transport)\n",[531,3695,3696,3715,3733,3753,3757,3772,3787,3793,3813,3838,3855,3861,3865],{"__ignoreMap":625},[629,3697,3698,3700,3702,3705,3707,3709,3711,3713],{"class":631,"line":632},[629,3699,643],{"class":642},[629,3701,650],{"class":649},[629,3703,3704],{"class":653}," createHttpDrain",[629,3706,657],{"class":649},[629,3708,660],{"class":642},[629,3710,663],{"class":649},[629,3712,3203],{"class":666},[629,3714,670],{"class":649},[629,3716,3717,3719,3721,3723,3725,3727,3729,3731],{"class":631,"line":639},[629,3718,643],{"class":642},[629,3720,650],{"class":649},[629,3722,680],{"class":653},[629,3724,657],{"class":649},[629,3726,660],{"class":642},[629,3728,663],{"class":649},[629,3730,537],{"class":666},[629,3732,670],{"class":649},[629,3734,3735,3737,3739,3741,3743,3745,3747,3749,3751],{"class":631,"line":673},[629,3736,643],{"class":642},[629,3738,646],{"class":642},[629,3740,650],{"class":649},[629,3742,654],{"class":653},[629,3744,657],{"class":649},[629,3746,660],{"class":642},[629,3748,663],{"class":649},[629,3750,667],{"class":666},[629,3752,670],{"class":649},[629,3754,3755],{"class":631,"line":693},[629,3756,718],{"emptyLinePlaceholder":717},[629,3758,3759,3761,3764,3766,3768,3770],{"class":631,"line":714},[629,3760,977],{"class":745},[629,3762,3763],{"class":653}," transport ",[629,3765,983],{"class":649},[629,3767,3704],{"class":730},[629,3769,734],{"class":653},[629,3771,1052],{"class":649},[629,3773,3774,3777,3779,3781,3783,3785],{"class":631,"line":721},[629,3775,3776],{"class":776},"  endpoint",[629,3778,1060],{"class":649},[629,3780,663],{"class":649},[629,3782,3358],{"class":666},[629,3784,824],{"class":649},[629,3786,1070],{"class":649},[629,3788,3789,3791],{"class":631,"line":752},[629,3790,880],{"class":649},[629,3792,837],{"class":653},[629,3794,3795,3797,3799,3801,3803,3805,3807,3809,3811],{"class":631,"line":780},[629,3796,977],{"class":745},[629,3798,980],{"class":653},[629,3800,983],{"class":649},[629,3802,680],{"class":730},[629,3804,766],{"class":649},[629,3806,770],{"class":769},[629,3808,773],{"class":649},[629,3810,734],{"class":653},[629,3812,1052],{"class":649},[629,3814,3815,3817,3819,3821,3823,3825,3827,3829,3831,3833,3836],{"class":631,"line":800},[629,3816,1602],{"class":776},[629,3818,1060],{"class":649},[629,3820,650],{"class":649},[629,3822,2345],{"class":776},[629,3824,1060],{"class":649},[629,3826,3006],{"class":1616},[629,3828,832],{"class":649},[629,3830,2354],{"class":776},[629,3832,1060],{"class":649},[629,3834,3835],{"class":1616}," 10000",[629,3837,2361],{"class":649},[629,3839,3840,3842,3844,3846,3848,3850,3853],{"class":631,"line":805},[629,3841,1647],{"class":776},[629,3843,1060],{"class":649},[629,3845,650],{"class":649},[629,3847,2372],{"class":776},[629,3849,1060],{"class":649},[629,3851,3852],{"class":1616}," 5",[629,3854,2361],{"class":649},[629,3856,3857,3859],{"class":631,"line":840},[629,3858,880],{"class":649},[629,3860,837],{"class":653},[629,3862,3863],{"class":631,"line":877},[629,3864,718],{"emptyLinePlaceholder":717},[629,3866,3867,3869,3871,3873,3875],{"class":631,"line":1080},[629,3868,977],{"class":745},[629,3870,1000],{"class":653},[629,3872,983],{"class":649},[629,3874,758],{"class":730},[629,3876,3877],{"class":653},"(transport)\n",[1830,3879,3881],{"id":3880},"configuration-reference","Configuration reference",[3483,3883,3885],{"id":3884},"httpdrainconfig",[531,3886,3887],{},"HttpDrainConfig",[454,3889,3890,3900],{},[457,3891,3892],{},[460,3893,3894,3896,3898],{},[463,3895,1842],{},[463,3897,1845],{},[463,3899,1848],{},[470,3901,3902,3917,3938,3952,3970],{},[460,3903,3904,3909,3911],{},[475,3905,3906],{},[531,3907,3908],{},"endpoint",[475,3910,1967],{},[475,3912,3913,3916],{},[2618,3914,3915],{},"(required)"," Full URL of the server ingest endpoint",[460,3918,3919,3924,3926],{},[475,3920,3921],{},[531,3922,3923],{},"headers",[475,3925,1967],{},[475,3927,3928,3929,3931,3932,2153,3935,591],{},"Custom headers sent with each ",[531,3930,3459],{}," request (e.g. ",[531,3933,3934],{},"Authorization",[531,3936,3937],{},"X-API-Key",[460,3939,3940,3945,3949],{},[475,3941,3942],{},[531,3943,3944],{},"timeout",[475,3946,3947],{},[531,3948,1875],{},[475,3950,3951],{},"Request timeout in milliseconds",[460,3953,3954,3959,3964],{},[475,3955,3956],{},[531,3957,3958],{},"useBeacon",[475,3960,3961],{},[531,3962,3963],{},"true",[475,3965,3966,3967,3969],{},"Use ",[531,3968,3183],{}," when the page is hidden",[460,3971,3972,3977,3982],{},[475,3973,3974],{},[531,3975,3976],{},"credentials",[475,3978,3979],{},[531,3980,3981],{},"'same-origin'",[475,3983,3984,3985,2153,3988,2153,3990,3993,3994,3996],{},"Fetch credentials mode (",[531,3986,3987],{},"'omit'",[531,3989,3981],{},[531,3991,3992],{},"'include'","). Set to ",[531,3995,3992],{}," for cross-origin endpoints",[3483,3998,4000],{"id":3999},"httplogdrainoptions",[531,4001,4002],{},"HttpLogDrainOptions",[454,4004,4005,4015],{},[457,4006,4007],{},[460,4008,4009,4011,4013],{},[463,4010,1842],{},[463,4012,1845],{},[463,4014,1848],{},[470,4016,4017,4034,4049],{},[460,4018,4019,4024,4026],{},[475,4020,4021],{},[531,4022,4023],{},"drain",[475,4025,1967],{},[475,4027,4028,4030,4031,4033],{},[2618,4029,3915],{}," ",[531,4032,3887],{}," object",[460,4035,4036,4041,4046],{},[475,4037,4038],{},[531,4039,4040],{},"pipeline",[475,4042,4043],{},[531,4044,4045],{},"{ batch: { size: 25, intervalMs: 2000 }, retry: { maxAttempts: 2 } }",[475,4047,4048],{},"Pipeline configuration overrides",[460,4050,4051,4056,4060],{},[475,4052,4053],{},[531,4054,4055],{},"autoFlush",[475,4057,4058],{},[531,4059,3963],{},[475,4061,4062,4063,4065],{},"Auto-register ",[531,4064,3187],{}," flush listener",[1830,4067,4069],{"id":4068},"sendbeacon-fallback","sendBeacon fallback",[1464,4071,4073,4074,4076,4077,4079,4080,4082],{"color":3396,"icon":4072},"i-lucide-radio","When ",[531,4075,3958],{}," is enabled (the default) and the page becomes hidden, the drain automatically switches from ",[531,4078,3459],{}," to ",[531,4081,3470],{},". This ensures logs are delivered even when the user closes the tab or navigates away.",[441,4084,4085,4087],{},[531,4086,3183],{}," has a browser-imposed payload limit (~64 KB). If the payload exceeds this, the drain throws an error. Keep batch sizes reasonable (the default of 25 is well within limits).",[1830,4089,4091],{"id":4090},"authentication","Authentication",[441,4093,4094],{},"Pass custom headers to protect your ingest endpoint:",[619,4096,4098],{"className":621,"code":4097,"filename":3279,"language":624,"meta":625,"style":625},"const drain = createHttpLogDrain({\n  drain: {\n    endpoint: 'https:\u002F\u002Flogs.example.com\u002Fv1\u002Fingest',\n    headers: {\n      'Authorization': 'Bearer ' + token,\n    },\n  },\n})\n",[531,4099,4100,4114,4122,4137,4145,4171,4176,4180],{"__ignoreMap":625},[629,4101,4102,4104,4106,4108,4110,4112],{"class":631,"line":632},[629,4103,977],{"class":745},[629,4105,1000],{"class":653},[629,4107,983],{"class":649},[629,4109,3312],{"class":730},[629,4111,734],{"class":653},[629,4113,1052],{"class":649},[629,4115,4116,4118,4120],{"class":631,"line":639},[629,4117,1075],{"class":776},[629,4119,1060],{"class":649},[629,4121,749],{"class":649},[629,4123,4124,4127,4129,4131,4133,4135],{"class":631,"line":673},[629,4125,4126],{"class":776},"    endpoint",[629,4128,1060],{"class":649},[629,4130,663],{"class":649},[629,4132,3358],{"class":666},[629,4134,824],{"class":649},[629,4136,1070],{"class":649},[629,4138,4139,4141,4143],{"class":631,"line":693},[629,4140,3083],{"class":776},[629,4142,1060],{"class":649},[629,4144,749],{"class":649},[629,4146,4147,4150,4152,4154,4156,4158,4161,4163,4166,4169],{"class":631,"line":714},[629,4148,4149],{"class":649},"      '",[629,4151,3934],{"class":776},[629,4153,824],{"class":649},[629,4155,1060],{"class":649},[629,4157,663],{"class":649},[629,4159,4160],{"class":666},"Bearer ",[629,4162,824],{"class":649},[629,4164,4165],{"class":649}," +",[629,4167,4168],{"class":653}," token",[629,4170,1070],{"class":649},[629,4172,4173],{"class":631,"line":721},[629,4174,4175],{"class":649},"    },\n",[629,4177,4178],{"class":631,"line":752},[629,4179,1642],{"class":649},[629,4181,4182,4184],{"class":631,"line":780},[629,4183,880],{"class":649},[629,4185,837],{"class":653},[1464,4187,4188,4190,4191,4193,4194,4196,4197,4199,4200,4203,4204,3460,4206,811],{"color":1466,"icon":54},[531,4189,3923],{}," are applied to ",[531,4192,3459],{}," requests only. The ",[531,4195,3183],{}," API does not support custom headers, so when the page is hidden and ",[531,4198,3183],{}," is used, headers are not sent. If your endpoint requires authentication, validate via a session cookie (set ",[531,4201,4202],{},"credentials: 'include'"," for cross-origin endpoints) or disable ",[531,4205,3183],{},[531,4207,4208],{},"useBeacon: false",[1830,4210,4212],{"id":4211},"server-endpoint","Server endpoint",[441,4214,4215,4216,4218],{},"Your server needs a POST endpoint that accepts a ",[531,4217,3266],{}," JSON body. Examples for common frameworks:",[616,4220,4221,4363],{},[619,4222,4224],{"className":621,"code":4223,"filename":192,"language":624,"meta":625,"style":625},"app.post('\u002Fv1\u002Fingest', express.json(), (req, res) => {\n  for (const entry of req.body) {\n    console.log('[BROWSER]', JSON.stringify(entry))\n  }\n  res.sendStatus(204)\n})\n",[531,4225,4226,4275,4302,4335,4340,4357],{"__ignoreMap":625},[629,4227,4228,4230,4232,4235,4237,4239,4242,4244,4246,4249,4251,4254,4257,4259,4261,4264,4266,4269,4271,4273],{"class":631,"line":632},[629,4229,1222],{"class":653},[629,4231,811],{"class":649},[629,4233,4234],{"class":730},"post",[629,4236,734],{"class":653},[629,4238,824],{"class":649},[629,4240,4241],{"class":666},"\u002Fv1\u002Fingest",[629,4243,824],{"class":649},[629,4245,832],{"class":649},[629,4247,4248],{"class":653}," express",[629,4250,811],{"class":649},[629,4252,4253],{"class":730},"json",[629,4255,4256],{"class":653},"()",[629,4258,832],{"class":649},[629,4260,1730],{"class":649},[629,4262,4263],{"class":739},"req",[629,4265,832],{"class":649},[629,4267,4268],{"class":739}," res",[629,4270,591],{"class":649},[629,4272,746],{"class":745},[629,4274,749],{"class":649},[629,4276,4277,4280,4282,4284,4287,4290,4293,4295,4298,4300],{"class":631,"line":639},[629,4278,4279],{"class":642},"  for",[629,4281,1730],{"class":776},[629,4283,977],{"class":745},[629,4285,4286],{"class":653}," entry",[629,4288,4289],{"class":649}," of",[629,4291,4292],{"class":653}," req",[629,4294,811],{"class":649},[629,4296,4297],{"class":653},"body",[629,4299,2819],{"class":776},[629,4301,1052],{"class":649},[629,4303,4304,4306,4308,4310,4312,4314,4317,4319,4321,4323,4325,4327,4329,4332],{"class":631,"line":673},[629,4305,1750],{"class":653},[629,4307,811],{"class":649},[629,4309,3391],{"class":730},[629,4311,734],{"class":776},[629,4313,824],{"class":649},[629,4315,4316],{"class":666},"[BROWSER]",[629,4318,824],{"class":649},[629,4320,832],{"class":649},[629,4322,3115],{"class":653},[629,4324,811],{"class":649},[629,4326,3120],{"class":730},[629,4328,734],{"class":776},[629,4330,4331],{"class":653},"entry",[629,4333,4334],{"class":776},"))\n",[629,4336,4337],{"class":631,"line":693},[629,4338,4339],{"class":649},"  }\n",[629,4341,4342,4345,4347,4350,4352,4355],{"class":631,"line":714},[629,4343,4344],{"class":653},"  res",[629,4346,811],{"class":649},[629,4348,4349],{"class":730},"sendStatus",[629,4351,734],{"class":776},[629,4353,4354],{"class":1616},"204",[629,4356,837],{"class":776},[629,4358,4359,4361],{"class":631,"line":721},[629,4360,880],{"class":649},[629,4362,837],{"class":653},[619,4364,4366],{"className":621,"code":4365,"filename":197,"language":624,"meta":625,"style":625},"app.post('\u002Fv1\u002Fingest', async (c) => {\n  const body = await c.req.json()\n  for (const entry of body) {\n    console.log('[BROWSER]', JSON.stringify(entry))\n  }\n  return c.body(null, 204)\n})\n",[531,4367,4368,4399,4423,4441,4471,4475,4496],{"__ignoreMap":625},[629,4369,4370,4372,4374,4376,4378,4380,4382,4384,4386,4389,4391,4393,4395,4397],{"class":631,"line":632},[629,4371,1222],{"class":653},[629,4373,811],{"class":649},[629,4375,4234],{"class":730},[629,4377,734],{"class":653},[629,4379,824],{"class":649},[629,4381,4241],{"class":666},[629,4383,824],{"class":649},[629,4385,832],{"class":649},[629,4387,4388],{"class":745}," async",[629,4390,1730],{"class":649},[629,4392,2770],{"class":739},[629,4394,591],{"class":649},[629,4396,746],{"class":745},[629,4398,749],{"class":649},[629,4400,4401,4403,4406,4408,4411,4413,4415,4417,4419,4421],{"class":631,"line":639},[629,4402,755],{"class":745},[629,4404,4405],{"class":653}," body",[629,4407,761],{"class":649},[629,4409,4410],{"class":642}," await",[629,4412,2775],{"class":653},[629,4414,811],{"class":649},[629,4416,4263],{"class":653},[629,4418,811],{"class":649},[629,4420,4253],{"class":730},[629,4422,777],{"class":776},[629,4424,4425,4427,4429,4431,4433,4435,4437,4439],{"class":631,"line":673},[629,4426,4279],{"class":642},[629,4428,1730],{"class":776},[629,4430,977],{"class":745},[629,4432,4286],{"class":653},[629,4434,4289],{"class":649},[629,4436,4405],{"class":653},[629,4438,2819],{"class":776},[629,4440,1052],{"class":649},[629,4442,4443,4445,4447,4449,4451,4453,4455,4457,4459,4461,4463,4465,4467,4469],{"class":631,"line":693},[629,4444,1750],{"class":653},[629,4446,811],{"class":649},[629,4448,3391],{"class":730},[629,4450,734],{"class":776},[629,4452,824],{"class":649},[629,4454,4316],{"class":666},[629,4456,824],{"class":649},[629,4458,832],{"class":649},[629,4460,3115],{"class":653},[629,4462,811],{"class":649},[629,4464,3120],{"class":730},[629,4466,734],{"class":776},[629,4468,4331],{"class":653},[629,4470,4334],{"class":776},[629,4472,4473],{"class":631,"line":714},[629,4474,4339],{"class":649},[629,4476,4477,4480,4482,4484,4486,4488,4491,4494],{"class":631,"line":721},[629,4478,4479],{"class":642},"  return",[629,4481,2775],{"class":653},[629,4483,811],{"class":649},[629,4485,4297],{"class":730},[629,4487,734],{"class":776},[629,4489,4490],{"class":649},"null,",[629,4492,4493],{"class":1616}," 204",[629,4495,837],{"class":776},[629,4497,4498,4500],{"class":631,"line":752},[629,4499,880],{"class":649},[629,4501,837],{"class":653},[441,4503,4504,4505,4510],{},"See the full ",[445,4506,4509],{"href":4507,"rel":4508},"https:\u002F\u002Fgithub.com\u002Fhugorcd\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Fbrowser",[602],"browser example"," for a working Hono server + browser page.",[609,4512,4514],{"id":4513},"common-pitfalls","Common pitfalls",[524,4516,4517,4525,4533,4539],{},[527,4518,4519,4524],{},[2618,4520,2175,4521,4523],{},[531,4522,578],{}," on shutdown"," — buffered events are lost otherwise",[527,4526,4527,4532],{},[2618,4528,2150,4529,4531],{},[531,4530,1492],{}," to match your provider's recommended payload"," — too small wastes overhead, too big risks rejection",[527,4534,4535,4538],{},[2618,4536,4537],{},"Don't run one pipeline per drain unless you need per-destination retries"," — sharing one pipeline keeps batching + buffering coherent",[527,4540,4541,4544,4545,4548],{},[2618,4542,4543],{},"Don't fan out to a serverless-incompatible target without checking"," — the ",[445,4546,4547],{"href":359},"stream server"," reaches every connected client through the in-process stream; it's not a drain",[609,4550,4552],{"id":4551},"next-steps","Next steps",[524,4554,4555,4566,4572,4577],{},[527,4556,4557,4560,4561,2168,4563],{},[445,4558,4559],{"href":395},"Custom Drains"," — build a drain for any backend with ",[531,4562,3169],{},[531,4564,4565],{},"defineDrain",[527,4567,4568,4571],{},[445,4569,4570],{"href":95},"Adapters Overview"," — built-in adapters that work with the pipeline out of the box",[527,4573,4574,4576],{},[445,4575,422],{"href":423}," — security and production tips",[527,4578,4579,4582],{},[445,4580,4581],{"href":251},"Client logging"," — end-to-end browser → server flow",[4584,4585,4586],"style",{},"html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .s2Zo4, html code.shiki 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.sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}",{"title":625,"searchDepth":639,"depth":639,"links":4588},[4589,4590,4591,4596,4601,4602,4611,4612],{"id":611,"depth":639,"text":483},{"id":1482,"depth":639,"text":1483},{"id":1511,"depth":639,"text":409,"children":4592},[4593,4594,4595],{"id":1832,"depth":673,"text":1833},{"id":1973,"depth":673,"text":1974},{"id":2032,"depth":673,"text":2033},{"id":2103,"depth":639,"text":494,"children":4597},[4598,4599,4600],{"id":2186,"depth":673,"text":2187},{"id":2611,"depth":673,"text":2612},{"id":2638,"depth":673,"text":2639},{"id":2921,"depth":639,"text":2922},{"id":3173,"depth":639,"text":504,"children":4603},[4604,4605,4606,4607,4608,4609,4610],{"id":3275,"depth":673,"text":483},{"id":3434,"depth":673,"text":3435},{"id":3480,"depth":673,"text":3481},{"id":3880,"depth":673,"text":3881},{"id":4068,"depth":673,"text":4069},{"id":4090,"depth":673,"text":4091},{"id":4211,"depth":673,"text":4212},{"id":4513,"depth":639,"text":4514},{"id":4551,"depth":639,"text":4552},"Batch events, retry on failure, fan out to multiple destinations, and ship browser logs to your server. The shared pipeline that wraps every drain in production.","md",[4616,4618],{"label":4559,"icon":397,"to":395,"color":3191,"variant":4617},"subtle",{"label":4570,"icon":4619,"to":95,"color":3191,"variant":4617},"i-custom-plug",{},{"title":399,"icon":402},{"title":436,"description":4613},"3mH3WlVMmFcR1dTFJGDSmWBM45oZ5qBDBE6EvZSHwAU",[4625,4627],{"title":394,"path":395,"stem":396,"description":4626,"icon":397,"children":-1},"Build a drain for any backend without a built-in adapter — defineHttpDrain for HTTP destinations, defineDrain for any other transport. Standardized config resolution, retries, timeouts, and identity headers handled for you.",{"title":409,"path":410,"stem":411,"description":4628,"icon":412,"children":-1},"Complete reference for all evlog configuration options including global logger settings, middleware options, environment context, and framework-specific overrides.",1778446115690]