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Sampling lets you keep costs under control without losing visibility into what matters. evlog uses a two-tier approach: head sampling drops noise upfront, tail sampling rescues critical events after the fact.",[454,455,458,461,487],"prompt",{":actions":456,"description":457,"icon":64},"[\"copy\",\"cursor\",\"windsurf\"]","Enable head and tail sampling",[450,459,460],{},"Enable head and tail sampling in my evlog production config.",[462,463,464,468,471,478,481,484],"ul",{},[465,466,467],"li",{},"Identify my framework and locate the evlog config (nuxt.config.ts, lib\u002Fevlog.ts, initLogger, etc.)",[465,469,470],{},"Configure sampling.rates per level: { info: 10, warn: 50, debug: 0, error: 100 } as a starting point",[465,472,473,474],{},"Add sampling.keep rules to force-keep critical events: ",[475,476,477],"span",{},"{ status: 400 }, { duration: 1000 }, { path: '\u002Fapi\u002Fcritical\u002F**' }",[465,479,480],{},"For business-specific keep logic (e.g. premium users), add a custom keep callback or evlog:emit:keep hook",[465,482,483],{},"Wrap sampling in a $production override so dev keeps full logging",[465,485,486],{},"Confirm errors are always kept by default unless I explicitly set error: 0",[450,488,489,490,496,497],{},"Docs: ",[491,492,493],"a",{"href":493,"rel":494},"https:\u002F\u002Fwww.evlog.dev\u002Flearn\u002Fsampling",[495],"nofollow","\nBest practices: ",[491,498,499],{"href":499,"rel":500},"https:\u002F\u002Fwww.evlog.dev\u002Freference\u002Fbest-practices",[495],[502,503,505],"h2",{"id":504},"head-sampling","Head Sampling",[450,507,508,509,513],{},"Head sampling randomly keeps a percentage of logs per level. 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{\n",[475,594,596,599,601],{"class":533,"line":595},4,[475,597,598],{"class":559},"    sampling",[475,600,563],{"class":552},[475,602,592],{"class":552},[475,604,606,609,611],{"class":533,"line":605},5,[475,607,608],{"class":559},"      rates",[475,610,563],{"class":552},[475,612,592],{"class":552},[475,614,616,619,621,625,628],{"class":533,"line":615},6,[475,617,618],{"class":559},"        info",[475,620,563],{"class":552},[475,622,624],{"class":623},"sbssI"," 10",[475,626,627],{"class":552},",",[475,629,631],{"class":630},"sHwdD","    \u002F\u002F Keep 10% of info logs\n",[475,633,635,638,640,643,645],{"class":533,"line":634},7,[475,636,637],{"class":559},"        warn",[475,639,563],{"class":552},[475,641,642],{"class":623}," 50",[475,644,627],{"class":552},[475,646,647],{"class":630},"    \u002F\u002F Keep 50% of warnings\n",[475,649,651,654,656,659,661],{"class":533,"line":650},8,[475,652,653],{"class":559},"        debug",[475,655,563],{"class":552},[475,657,658],{"class":623}," 0",[475,660,627],{"class":552},[475,662,663],{"class":630},"    \u002F\u002F Drop all debug logs\n",[475,665,667,670,672,675,677],{"class":533,"line":666},9,[475,668,669],{"class":559},"        error",[475,671,563],{"class":552},[475,673,674],{"class":623}," 100",[475,676,627],{"class":552},[475,678,679],{"class":630},"  \u002F\u002F Always keep errors (default)\n",[475,681,683],{"class":533,"line":682},10,[475,684,685],{"class":552},"      },\n",[475,687,689],{"class":533,"line":688},11,[475,690,691],{"class":552},"    },\n",[475,693,695],{"class":533,"line":694},12,[475,696,697],{"class":552},"  },\n",[475,699,701,704],{"class":533,"line":700},13,[475,702,703],{"class":552},"}",[475,705,706],{"class":548},")\n",[521,708,711],{"className":523,"code":709,"filename":710,"language":526,"meta":527,"style":527},"import { createEvlog } from 'evlog\u002Fnext'\n\nexport const { withEvlog, useLogger } = createEvlog({\n  service: 'my-app',\n  sampling: {\n    rates: {\n      info: 10,\n      warn: 50,\n      debug: 0,\n      error: 100,\n    },\n  },\n})\n","lib\u002Fevlog.ts (Next.js)",[529,712,713,739,745,774,790,799,808,819,830,841,852,856,860],{"__ignoreMap":527},[475,714,715,718,721,724,727,730,733,736],{"class":533,"line":534},[475,716,717],{"class":537},"import",[475,719,720],{"class":552}," {",[475,722,723],{"class":548}," createEvlog",[475,725,726],{"class":552}," }",[475,728,729],{"class":537}," from",[475,731,732],{"class":552}," '",[475,734,735],{"class":572},"evlog\u002Fnext",[475,737,738],{"class":552},"'\n",[475,740,741],{"class":533,"line":556},[475,742,744],{"emptyLinePlaceholder":743},true,"\n",[475,746,747,749,753,755,758,760,763,765,768,770,772],{"class":533,"line":584},[475,748,538],{"class":537},[475,750,752],{"class":751},"spNyl"," const",[475,754,720],{"class":552},[475,756,757],{"class":548}," withEvlog",[475,759,627],{"class":552},[475,761,762],{"class":548}," useLogger ",[475,764,703],{"class":552},[475,766,767],{"class":552}," =",[475,769,723],{"class":544},[475,771,549],{"class":548},[475,773,553],{"class":552},[475,775,776,779,781,783,786,788],{"class":533,"line":595},[475,777,778],{"class":559},"  service",[475,780,563],{"class":552},[475,782,732],{"class":552},[475,784,785],{"class":572},"my-app",[475,787,569],{"class":552},[475,789,581],{"class":552},[475,791,792,795,797],{"class":533,"line":605},[475,793,794],{"class":559},"  sampling",[475,796,563],{"class":552},[475,798,592],{"class":552},[475,800,801,804,806],{"class":533,"line":615},[475,802,803],{"class":559},"    rates",[475,805,563],{"class":552},[475,807,592],{"class":552},[475,809,810,813,815,817],{"class":533,"line":634},[475,811,812],{"class":559},"      info",[475,814,563],{"class":552},[475,816,624],{"class":623},[475,818,581],{"class":552},[475,820,821,824,826,828],{"class":533,"line":650},[475,822,823],{"class":559},"      warn",[475,825,563],{"class":552},[475,827,642],{"class":623},[475,829,581],{"class":552},[475,831,832,835,837,839],{"class":533,"line":666},[475,833,834],{"class":559},"      debug",[475,836,563],{"class":552},[475,838,658],{"class":623},[475,840,581],{"class":552},[475,842,843,846,848,850],{"class":533,"line":682},[475,844,845],{"class":559},"      error",[475,847,563],{"class":552},[475,849,674],{"class":623},[475,851,581],{"class":552},[475,853,854],{"class":533,"line":688},[475,855,691],{"class":552},[475,857,858],{"class":533,"line":694},[475,859,697],{"class":552},[475,861,862,864],{"class":533,"line":700},[475,863,703],{"class":552},[475,865,706],{"class":548},[521,867,870],{"className":523,"code":868,"filename":869,"language":526,"meta":527,"style":527},"import { initLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'my-app' },\n  sampling: {\n    rates: {\n      info: 10,\n      warn: 50,\n      debug: 0,\n      error: 100,\n    },\n  },\n})\n","index.ts (Hono \u002F Express \u002F Fastify)",[529,871,872,892,896,905,928,936,944,954,964,974,984,988,992],{"__ignoreMap":527},[475,873,874,876,878,881,883,885,887,890],{"class":533,"line":534},[475,875,717],{"class":537},[475,877,720],{"class":552},[475,879,880],{"class":548}," initLogger",[475,882,726],{"class":552},[475,884,729],{"class":537},[475,886,732],{"class":552},[475,888,889],{"class":572},"evlog",[475,891,738],{"class":552},[475,893,894],{"class":533,"line":556},[475,895,744],{"emptyLinePlaceholder":743},[475,897,898,901,903],{"class":533,"line":584},[475,899,900],{"class":544},"initLogger",[475,902,549],{"class":548},[475,904,553],{"class":552},[475,906,907,910,912,914,917,919,921,923,925],{"class":533,"line":595},[475,908,909],{"class":559},"  env",[475,911,563],{"class":552},[475,913,720],{"class":552},[475,915,916],{"class":559}," service",[475,918,563],{"class":552},[475,920,732],{"class":552},[475,922,785],{"class":572},[475,924,569],{"class":552},[475,926,927],{"class":552}," },\n",[475,929,930,932,934],{"class":533,"line":605},[475,931,794],{"class":559},[475,933,563],{"class":552},[475,935,592],{"class":552},[475,937,938,940,942],{"class":533,"line":615},[475,939,803],{"class":559},[475,941,563],{"class":552},[475,943,592],{"class":552},[475,945,946,948,950,952],{"class":533,"line":634},[475,947,812],{"class":559},[475,949,563],{"class":552},[475,951,624],{"class":623},[475,953,581],{"class":552},[475,955,956,958,960,962],{"class":533,"line":650},[475,957,823],{"class":559},[475,959,563],{"class":552},[475,961,642],{"class":623},[475,963,581],{"class":552},[475,965,966,968,970,972],{"class":533,"line":666},[475,967,834],{"class":559},[475,969,563],{"class":552},[475,971,658],{"class":623},[475,973,581],{"class":552},[475,975,976,978,980,982],{"class":533,"line":682},[475,977,845],{"class":559},[475,979,563],{"class":552},[475,981,674],{"class":623},[475,983,581],{"class":552},[475,985,986],{"class":533,"line":688},[475,987,691],{"class":552},[475,989,990],{"class":533,"line":694},[475,991,697],{"class":552},[475,993,994,996],{"class":533,"line":700},[475,995,703],{"class":552},[475,997,706],{"class":548},[450,999,1000,1001,1004],{},"Each level is a percentage from 0 to 100. Levels you don't configure default to 100% (keep everything). Error defaults to 100% even when other levels are configured, so you have to explicitly set ",[529,1002,1003],{},"error: 0"," to drop errors.",[1006,1007,1009,1010,1013],"callout",{"color":1008,"icon":13},"info","Head sampling is random. A ",[529,1011,1012],{},"10%"," rate means roughly 1 in 10 info logs are kept, not exactly 1 in 10.",[502,1015,1017],{"id":1016},"tail-sampling","Tail Sampling",[450,1019,1020,1021,1024],{},"Head sampling is blind: it doesn't know if a request was slow, failed, or hit a critical path. Tail sampling fixes this by evaluating ",[510,1022,1023],{},"after"," the request completes and force-keeping logs that match specific conditions.",[521,1026,1028],{"className":523,"code":1027,"filename":525,"language":526,"meta":527,"style":527},"\u002F\u002F Sampling config, works the same across all frameworks\nevlog: {\n  sampling: {\n    rates: { info: 10 },\n    keep: [\n      { status: 400 },              \u002F\u002F HTTP status >= 400\n      { duration: 1000 },           \u002F\u002F Request took >= 1s\n      { path: '\u002Fapi\u002Fpayments\u002F**' }, \u002F\u002F Critical path (glob)\n    ],\n  },\n}\n",[529,1029,1030,1035,1044,1052,1069,1079,1098,1115,1136,1143,1147],{"__ignoreMap":527},[475,1031,1032],{"class":533,"line":534},[475,1033,1034],{"class":630},"\u002F\u002F Sampling config, works the same across all frameworks\n",[475,1036,1037,1040,1042],{"class":533,"line":556},[475,1038,889],{"class":1039},"sBMFI",[475,1041,563],{"class":552},[475,1043,592],{"class":552},[475,1045,1046,1048,1050],{"class":533,"line":584},[475,1047,794],{"class":1039},[475,1049,563],{"class":552},[475,1051,592],{"class":552},[475,1053,1054,1056,1058,1060,1063,1065,1067],{"class":533,"line":595},[475,1055,803],{"class":1039},[475,1057,563],{"class":552},[475,1059,720],{"class":552},[475,1061,1062],{"class":1039}," info",[475,1064,563],{"class":552},[475,1066,624],{"class":623},[475,1068,927],{"class":552},[475,1070,1071,1074,1076],{"class":533,"line":605},[475,1072,1073],{"class":1039},"    keep",[475,1075,563],{"class":552},[475,1077,1078],{"class":559}," [\n",[475,1080,1081,1084,1087,1089,1092,1095],{"class":533,"line":615},[475,1082,1083],{"class":552},"      {",[475,1085,1086],{"class":559}," status",[475,1088,563],{"class":552},[475,1090,1091],{"class":623}," 400",[475,1093,1094],{"class":552}," },",[475,1096,1097],{"class":630},"              \u002F\u002F HTTP status >= 400\n",[475,1099,1100,1102,1105,1107,1110,1112],{"class":533,"line":634},[475,1101,1083],{"class":552},[475,1103,1104],{"class":559}," duration",[475,1106,563],{"class":552},[475,1108,1109],{"class":623}," 1000",[475,1111,1094],{"class":552},[475,1113,1114],{"class":630},"           \u002F\u002F Request took >= 1s\n",[475,1116,1117,1119,1122,1124,1126,1129,1131,1133],{"class":533,"line":650},[475,1118,1083],{"class":552},[475,1120,1121],{"class":559}," path",[475,1123,563],{"class":552},[475,1125,732],{"class":552},[475,1127,1128],{"class":572},"\u002Fapi\u002Fpayments\u002F**",[475,1130,569],{"class":552},[475,1132,1094],{"class":552},[475,1134,1135],{"class":630}," \u002F\u002F Critical path (glob)\n",[475,1137,1138,1141],{"class":533,"line":666},[475,1139,1140],{"class":559},"    ]",[475,1142,581],{"class":552},[475,1144,1145],{"class":533,"line":682},[475,1146,697],{"class":552},[475,1148,1149],{"class":533,"line":688},[475,1150,1151],{"class":552},"}\n",[450,1153,1154,1155,1158,1159,1162,1163,1166,1167,1170,1171,1174],{},"Conditions use ",[510,1156,1157],{},">="," comparison for ",[529,1160,1161],{},"status"," and ",[529,1164,1165],{},"duration",", and glob matching for ",[529,1168,1169],{},"path",". If ",[510,1172,1173],{},"any"," condition matches, the log is kept regardless of head sampling (OR logic).",[1176,1177,1179],"h3",{"id":1178},"available-conditions","Available Conditions",[1181,1182,1183,1199],"table",{},[1184,1185,1186],"thead",{},[1187,1188,1189,1193,1196],"tr",{},[1190,1191,1192],"th",{},"Condition",[1190,1194,1195],{},"Type",[1190,1197,1198],{},"Description",[1200,1201,1202,1221,1234],"tbody",{},[1187,1203,1204,1209,1214],{},[1205,1206,1207],"td",{},[529,1208,1161],{},[1205,1210,1211],{},[529,1212,1213],{},"number",[1205,1215,1216,1217,1220],{},"Keep if HTTP status >= value (e.g., ",[529,1218,1219],{},"400"," catches all 4xx and 5xx)",[1187,1222,1223,1227,1231],{},[1205,1224,1225],{},[529,1226,1165],{},[1205,1228,1229],{},[529,1230,1213],{},[1205,1232,1233],{},"Keep if request duration >= value in milliseconds",[1187,1235,1236,1240,1245],{},[1205,1237,1238],{},[529,1239,1169],{},[1205,1241,1242],{},[529,1243,1244],{},"string",[1205,1246,1247,1248,1251],{},"Keep if request path matches glob pattern (e.g., ",[529,1249,1250],{},"'\u002Fapi\u002Fcritical\u002F**'",")",[502,1253,1255],{"id":1254},"how-they-work-together","How They Work Together",[450,1257,1258],{},"The two tiers complement each other:",[1260,1261,1262,1268,1278,1284],"ol",{},[465,1263,1264,1267],{},[510,1265,1266],{},"Request completes"," - evlog knows the status, duration, and path",[465,1269,1270,1273,1274,1277],{},[510,1271,1272],{},"Tail sampling evaluates"," - if any ",[529,1275,1276],{},"keep"," condition matches, the log is force-kept",[465,1279,1280,1283],{},[510,1281,1282],{},"Head sampling applies"," - only if tail sampling didn't force-keep, the random percentage check runs",[465,1285,1286,1289],{},[510,1287,1288],{},"Log emits or drops"," - kept logs go through enrichment and draining as normal",[450,1291,1292,1293,1296,1297,1299],{},"This means a request to ",[529,1294,1295],{},"\u002Fapi\u002Fpayments\u002Fcharge"," that returns a 500 in 2 seconds will always be logged, even if ",[529,1298,1008],{}," is set to 1%. The tail conditions rescue it.",[1301,1302],"tail-sample-decision",{},[518,1304,1305,1381],{},[521,1306,1308],{"className":523,"code":1307,"filename":419,"language":526,"meta":527,"style":527},"sampling: {\n  rates: { info: 10 },\n  keep: [\n    { status: 400 },\n    { duration: 1000 },\n  ],\n}\n",[529,1309,1310,1319,1336,1345,1358,1370,1377],{"__ignoreMap":527},[475,1311,1312,1315,1317],{"class":533,"line":534},[475,1313,1314],{"class":1039},"sampling",[475,1316,563],{"class":552},[475,1318,592],{"class":552},[475,1320,1321,1324,1326,1328,1330,1332,1334],{"class":533,"line":556},[475,1322,1323],{"class":1039},"  rates",[475,1325,563],{"class":552},[475,1327,720],{"class":552},[475,1329,1062],{"class":1039},[475,1331,563],{"class":552},[475,1333,624],{"class":623},[475,1335,927],{"class":552},[475,1337,1338,1341,1343],{"class":533,"line":584},[475,1339,1340],{"class":1039},"  keep",[475,1342,563],{"class":552},[475,1344,1078],{"class":559},[475,1346,1347,1350,1352,1354,1356],{"class":533,"line":595},[475,1348,1349],{"class":552},"    {",[475,1351,1086],{"class":559},[475,1353,563],{"class":552},[475,1355,1091],{"class":623},[475,1357,927],{"class":552},[475,1359,1360,1362,1364,1366,1368],{"class":533,"line":605},[475,1361,1349],{"class":552},[475,1363,1104],{"class":559},[475,1365,563],{"class":552},[475,1367,1109],{"class":623},[475,1369,927],{"class":552},[475,1371,1372,1375],{"class":533,"line":615},[475,1373,1374],{"class":559},"  ]",[475,1376,581],{"class":552},[475,1378,1379],{"class":533,"line":634},[475,1380,1151],{"class":552},[521,1382,1387],{"className":1383,"code":1384,"filename":1385,"language":1386,"meta":527,"style":527},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","POST \u002Fapi\u002Fusers     200  45ms   → 10% chance (head sampling)\nPOST \u002Fapi\u002Fusers     500  45ms   → always kept (status >= 400)\nGET  \u002Fapi\u002Fproducts  200  2300ms → always kept (duration >= 1000)\nPOST \u002Fapi\u002Fcheckout  200  120ms  → 10% chance (head sampling)\n","What gets logged","bash",[529,1388,1389,1419,1451,1483],{"__ignoreMap":527},[475,1390,1391,1394,1397,1400,1403,1406,1409,1412,1415,1417],{"class":533,"line":534},[475,1392,1393],{"class":1039},"POST",[475,1395,1396],{"class":572}," \u002Fapi\u002Fusers",[475,1398,1399],{"class":623},"     200",[475,1401,1402],{"class":572},"  45ms",[475,1404,1405],{"class":572},"   →",[475,1407,1408],{"class":572}," 10%",[475,1410,1411],{"class":572}," chance",[475,1413,1414],{"class":548}," (head ",[475,1416,1314],{"class":572},[475,1418,706],{"class":548},[475,1420,1421,1423,1425,1428,1430,1432,1435,1438,1441,1444,1447,1449],{"class":533,"line":556},[475,1422,1393],{"class":1039},[475,1424,1396],{"class":572},[475,1426,1427],{"class":623},"     500",[475,1429,1402],{"class":572},[475,1431,1405],{"class":572},[475,1433,1434],{"class":572}," always",[475,1436,1437],{"class":572}," kept",[475,1439,1440],{"class":548}," (status ",[475,1442,1443],{"class":552},">",[475,1445,1446],{"class":572},"=",[475,1448,1091],{"class":623},[475,1450,706],{"class":548},[475,1452,1453,1456,1459,1462,1465,1468,1470,1472,1475,1477,1479,1481],{"class":533,"line":584},[475,1454,1455],{"class":1039},"GET",[475,1457,1458],{"class":572},"  \u002Fapi\u002Fproducts",[475,1460,1461],{"class":623},"  200",[475,1463,1464],{"class":572},"  2300ms",[475,1466,1467],{"class":572}," →",[475,1469,1434],{"class":572},[475,1471,1437],{"class":572},[475,1473,1474],{"class":548}," (duration ",[475,1476,1443],{"class":552},[475,1478,1446],{"class":572},[475,1480,1109],{"class":623},[475,1482,706],{"class":548},[475,1484,1485,1487,1490,1492,1495,1498,1500,1502,1504,1506],{"class":533,"line":595},[475,1486,1393],{"class":1039},[475,1488,1489],{"class":572}," \u002Fapi\u002Fcheckout",[475,1491,1461],{"class":623},[475,1493,1494],{"class":572},"  120ms",[475,1496,1497],{"class":572},"  →",[475,1499,1408],{"class":572},[475,1501,1411],{"class":572},[475,1503,1414],{"class":548},[475,1505,1314],{"class":572},[475,1507,706],{"class":548},[502,1509,1511],{"id":1510},"custom-tail-sampling","Custom Tail Sampling",[450,1513,1514,1515,1518,1519,1521],{},"For conditions beyond status, duration, and path, use the ",[529,1516,1517],{},"evlog:emit:keep"," hook in Nuxt\u002FNitro or the ",[529,1520,1276],{}," callback in other frameworks.",[518,1523,1524,1666,1853],{},[521,1525,1528],{"className":523,"code":1526,"filename":1527,"language":526,"meta":527,"style":527},"export default defineNitroPlugin((nitroApp) => {\n  nitroApp.hooks.hook('evlog:emit:keep', (ctx) => {\n    if (ctx.context.user?.plan === 'enterprise') {\n      ctx.shouldKeep = true\n    }\n  })\n})\n","server\u002Fplugins\u002Fsampling.ts (Nuxt)",[529,1529,1530,1554,1592,1632,1648,1653,1660],{"__ignoreMap":527},[475,1531,1532,1534,1536,1539,1541,1543,1547,1549,1552],{"class":533,"line":534},[475,1533,538],{"class":537},[475,1535,541],{"class":537},[475,1537,1538],{"class":544}," defineNitroPlugin",[475,1540,549],{"class":548},[475,1542,549],{"class":552},[475,1544,1546],{"class":1545},"sHdIc","nitroApp",[475,1548,1251],{"class":552},[475,1550,1551],{"class":751}," =>",[475,1553,592],{"class":552},[475,1555,1556,1559,1562,1565,1567,1570,1572,1574,1576,1578,1580,1583,1586,1588,1590],{"class":533,"line":556},[475,1557,1558],{"class":548},"  nitroApp",[475,1560,1561],{"class":552},".",[475,1563,1564],{"class":548},"hooks",[475,1566,1561],{"class":552},[475,1568,1569],{"class":544},"hook",[475,1571,549],{"class":559},[475,1573,569],{"class":552},[475,1575,1517],{"class":572},[475,1577,569],{"class":552},[475,1579,627],{"class":552},[475,1581,1582],{"class":552}," (",[475,1584,1585],{"class":1545},"ctx",[475,1587,1251],{"class":552},[475,1589,1551],{"class":751},[475,1591,592],{"class":552},[475,1593,1594,1597,1599,1601,1603,1606,1608,1611,1614,1617,1620,1622,1625,1627,1630],{"class":533,"line":584},[475,1595,1596],{"class":537},"    if",[475,1598,1582],{"class":559},[475,1600,1585],{"class":548},[475,1602,1561],{"class":552},[475,1604,1605],{"class":548},"context",[475,1607,1561],{"class":552},[475,1609,1610],{"class":548},"user",[475,1612,1613],{"class":552},"?.",[475,1615,1616],{"class":548},"plan",[475,1618,1619],{"class":552}," ===",[475,1621,732],{"class":552},[475,1623,1624],{"class":572},"enterprise",[475,1626,569],{"class":552},[475,1628,1629],{"class":559},") ",[475,1631,553],{"class":552},[475,1633,1634,1637,1639,1642,1644],{"class":533,"line":595},[475,1635,1636],{"class":548},"      ctx",[475,1638,1561],{"class":552},[475,1640,1641],{"class":548},"shouldKeep",[475,1643,767],{"class":552},[475,1645,1647],{"class":1646},"sfNiH"," true\n",[475,1649,1650],{"class":533,"line":605},[475,1651,1652],{"class":552},"    }\n",[475,1654,1655,1658],{"class":533,"line":615},[475,1656,1657],{"class":552},"  }",[475,1659,706],{"class":559},[475,1661,1662,1664],{"class":533,"line":634},[475,1663,703],{"class":552},[475,1665,706],{"class":548},[521,1667,1669],{"className":523,"code":1668,"filename":710,"language":526,"meta":527,"style":527},"import { createEvlog } from 'evlog\u002Fnext'\n\nexport const { withEvlog, useLogger } = createEvlog({\n  service: 'my-app',\n  sampling: {\n    rates: { info: 10 },\n    keep: [{ status: 400 }],\n  },\n  keep(ctx) {\n    if (ctx.context.user?.plan === 'enterprise') {\n      ctx.shouldKeep = true\n    }\n  },\n})\n",[529,1670,1671,1689,1693,1717,1731,1739,1755,1778,1782,1794,1826,1838,1842,1846],{"__ignoreMap":527},[475,1672,1673,1675,1677,1679,1681,1683,1685,1687],{"class":533,"line":534},[475,1674,717],{"class":537},[475,1676,720],{"class":552},[475,1678,723],{"class":548},[475,1680,726],{"class":552},[475,1682,729],{"class":537},[475,1684,732],{"class":552},[475,1686,735],{"class":572},[475,1688,738],{"class":552},[475,1690,1691],{"class":533,"line":556},[475,1692,744],{"emptyLinePlaceholder":743},[475,1694,1695,1697,1699,1701,1703,1705,1707,1709,1711,1713,1715],{"class":533,"line":584},[475,1696,538],{"class":537},[475,1698,752],{"class":751},[475,1700,720],{"class":552},[475,1702,757],{"class":548},[475,1704,627],{"class":552},[475,1706,762],{"class":548},[475,1708,703],{"class":552},[475,1710,767],{"class":552},[475,1712,723],{"class":544},[475,1714,549],{"class":548},[475,1716,553],{"class":552},[475,1718,1719,1721,1723,1725,1727,1729],{"class":533,"line":595},[475,1720,778],{"class":559},[475,1722,563],{"class":552},[475,1724,732],{"class":552},[475,1726,785],{"class":572},[475,1728,569],{"class":552},[475,1730,581],{"class":552},[475,1732,1733,1735,1737],{"class":533,"line":605},[475,1734,794],{"class":559},[475,1736,563],{"class":552},[475,1738,592],{"class":552},[475,1740,1741,1743,1745,1747,1749,1751,1753],{"class":533,"line":615},[475,1742,803],{"class":559},[475,1744,563],{"class":552},[475,1746,720],{"class":552},[475,1748,1062],{"class":559},[475,1750,563],{"class":552},[475,1752,624],{"class":623},[475,1754,927],{"class":552},[475,1756,1757,1759,1761,1763,1766,1768,1770,1772,1774,1776],{"class":533,"line":634},[475,1758,1073],{"class":559},[475,1760,563],{"class":552},[475,1762,566],{"class":548},[475,1764,1765],{"class":552},"{",[475,1767,1086],{"class":559},[475,1769,563],{"class":552},[475,1771,1091],{"class":623},[475,1773,726],{"class":552},[475,1775,578],{"class":548},[475,1777,581],{"class":552},[475,1779,1780],{"class":533,"line":650},[475,1781,697],{"class":552},[475,1783,1784,1786,1788,1790,1792],{"class":533,"line":666},[475,1785,1340],{"class":559},[475,1787,549],{"class":552},[475,1789,1585],{"class":1545},[475,1791,1251],{"class":552},[475,1793,592],{"class":552},[475,1795,1796,1798,1800,1802,1804,1806,1808,1810,1812,1814,1816,1818,1820,1822,1824],{"class":533,"line":682},[475,1797,1596],{"class":537},[475,1799,1582],{"class":559},[475,1801,1585],{"class":548},[475,1803,1561],{"class":552},[475,1805,1605],{"class":548},[475,1807,1561],{"class":552},[475,1809,1610],{"class":548},[475,1811,1613],{"class":552},[475,1813,1616],{"class":548},[475,1815,1619],{"class":552},[475,1817,732],{"class":552},[475,1819,1624],{"class":572},[475,1821,569],{"class":552},[475,1823,1629],{"class":559},[475,1825,553],{"class":552},[475,1827,1828,1830,1832,1834,1836],{"class":533,"line":688},[475,1829,1636],{"class":548},[475,1831,1561],{"class":552},[475,1833,1641],{"class":548},[475,1835,767],{"class":552},[475,1837,1647],{"class":1646},[475,1839,1840],{"class":533,"line":694},[475,1841,1652],{"class":552},[475,1843,1844],{"class":533,"line":700},[475,1845,697],{"class":552},[475,1847,1849,1851],{"class":533,"line":1848},14,[475,1850,703],{"class":552},[475,1852,706],{"class":548},[521,1854,1857],{"className":523,"code":1855,"filename":1856,"language":526,"meta":527,"style":527},"import { evlog } from 'evlog\u002Fhono'\n\napp.use(evlog({\n  keep(ctx) {\n    if (ctx.context.user?.plan === 'enterprise') {\n      ctx.shouldKeep = true\n    }\n  },\n}))\n","index.ts (Hono)",[529,1858,1859,1879,1883,1901,1913,1945,1957,1961,1965],{"__ignoreMap":527},[475,1860,1861,1863,1865,1868,1870,1872,1874,1877],{"class":533,"line":534},[475,1862,717],{"class":537},[475,1864,720],{"class":552},[475,1866,1867],{"class":548}," evlog",[475,1869,726],{"class":552},[475,1871,729],{"class":537},[475,1873,732],{"class":552},[475,1875,1876],{"class":572},"evlog\u002Fhono",[475,1878,738],{"class":552},[475,1880,1881],{"class":533,"line":556},[475,1882,744],{"emptyLinePlaceholder":743},[475,1884,1885,1888,1890,1893,1895,1897,1899],{"class":533,"line":584},[475,1886,1887],{"class":548},"app",[475,1889,1561],{"class":552},[475,1891,1892],{"class":544},"use",[475,1894,549],{"class":548},[475,1896,889],{"class":544},[475,1898,549],{"class":548},[475,1900,553],{"class":552},[475,1902,1903,1905,1907,1909,1911],{"class":533,"line":595},[475,1904,1340],{"class":559},[475,1906,549],{"class":552},[475,1908,1585],{"class":1545},[475,1910,1251],{"class":552},[475,1912,592],{"class":552},[475,1914,1915,1917,1919,1921,1923,1925,1927,1929,1931,1933,1935,1937,1939,1941,1943],{"class":533,"line":605},[475,1916,1596],{"class":537},[475,1918,1582],{"class":559},[475,1920,1585],{"class":548},[475,1922,1561],{"class":552},[475,1924,1605],{"class":548},[475,1926,1561],{"class":552},[475,1928,1610],{"class":548},[475,1930,1613],{"class":552},[475,1932,1616],{"class":548},[475,1934,1619],{"class":552},[475,1936,732],{"class":552},[475,1938,1624],{"class":572},[475,1940,569],{"class":552},[475,1942,1629],{"class":559},[475,1944,553],{"class":552},[475,1946,1947,1949,1951,1953,1955],{"class":533,"line":615},[475,1948,1636],{"class":548},[475,1950,1561],{"class":552},[475,1952,1641],{"class":548},[475,1954,767],{"class":552},[475,1956,1647],{"class":1646},[475,1958,1959],{"class":533,"line":634},[475,1960,1652],{"class":552},[475,1962,1963],{"class":533,"line":650},[475,1964,697],{"class":552},[475,1966,1967,1969],{"class":533,"line":666},[475,1968,703],{"class":552},[475,1970,1971],{"class":548},"))\n",[450,1973,1974,1975,1977],{},"The ",[529,1976,1585],{}," object contains:",[1181,1979,1980,1991],{},[1184,1981,1982],{},[1187,1983,1984,1987,1989],{},[1190,1985,1986],{},"Field",[1190,1988,1195],{},[1190,1990,1198],{},[1200,1992,1993,2007,2020,2034,2048,2065],{},[1187,1994,1995,1999,2004],{},[1205,1996,1997],{},[529,1998,1161],{},[1205,2000,2001],{},[529,2002,2003],{},"number | undefined",[1205,2005,2006],{},"HTTP response status",[1187,2008,2009,2013,2017],{},[1205,2010,2011],{},[529,2012,1165],{},[1205,2014,2015],{},[529,2016,2003],{},[1205,2018,2019],{},"Request duration in ms",[1187,2021,2022,2026,2031],{},[1205,2023,2024],{},[529,2025,1169],{},[1205,2027,2028],{},[529,2029,2030],{},"string | undefined",[1205,2032,2033],{},"Request path",[1187,2035,2036,2041,2045],{},[1205,2037,2038],{},[529,2039,2040],{},"method",[1205,2042,2043],{},[529,2044,2030],{},[1205,2046,2047],{},"HTTP method",[1187,2049,2050,2054,2059],{},[1205,2051,2052],{},[529,2053,1605],{},[1205,2055,2056],{},[529,2057,2058],{},"Record\u003Cstring, unknown>",[1205,2060,2061,2062],{},"All fields set via ",[529,2063,2064],{},"log.set()",[1187,2066,2067,2071,2076],{},[1205,2068,2069],{},[529,2070,1641],{},[1205,2072,2073],{},[529,2074,2075],{},"boolean",[1205,2077,2078,2079,2082],{},"Set to ",[529,2080,2081],{},"true"," to force-keep",[502,2084,2086],{"id":2085},"production-example","Production Example",[450,2088,2089],{},"A typical production configuration that balances cost and visibility:",[518,2091,2092,2347,2552],{},[521,2093,2095],{"className":523,"code":2094,"filename":525,"language":526,"meta":527,"style":527},"export default defineNuxtConfig({\n  modules: ['evlog\u002Fnuxt'],\n  evlog: {\n    env: { service: 'my-app' },\n  },\n  $production: {\n    evlog: {\n      sampling: {\n        rates: {\n          info: 10,\n          warn: 50,\n          debug: 0,\n          error: 100,\n        },\n        keep: [\n          { status: 400 },\n          { duration: 1000 },\n          { path: '\u002Fapi\u002Fpayments\u002F**' },\n          { path: '\u002Fapi\u002Fauth\u002F**' },\n        ],\n      },\n    },\n  },\n})\n",[529,2096,2097,2109,2127,2135,2156,2160,2169,2178,2187,2196,2207,2218,2229,2240,2245,2255,2269,2282,2299,2317,2325,2330,2335,2340],{"__ignoreMap":527},[475,2098,2099,2101,2103,2105,2107],{"class":533,"line":534},[475,2100,538],{"class":537},[475,2102,541],{"class":537},[475,2104,545],{"class":544},[475,2106,549],{"class":548},[475,2108,553],{"class":552},[475,2110,2111,2113,2115,2117,2119,2121,2123,2125],{"class":533,"line":556},[475,2112,560],{"class":559},[475,2114,563],{"class":552},[475,2116,566],{"class":548},[475,2118,569],{"class":552},[475,2120,573],{"class":572},[475,2122,569],{"class":552},[475,2124,578],{"class":548},[475,2126,581],{"class":552},[475,2128,2129,2131,2133],{"class":533,"line":584},[475,2130,587],{"class":559},[475,2132,563],{"class":552},[475,2134,592],{"class":552},[475,2136,2137,2140,2142,2144,2146,2148,2150,2152,2154],{"class":533,"line":595},[475,2138,2139],{"class":559},"    env",[475,2141,563],{"class":552},[475,2143,720],{"class":552},[475,2145,916],{"class":559},[475,2147,563],{"class":552},[475,2149,732],{"class":552},[475,2151,785],{"class":572},[475,2153,569],{"class":552},[475,2155,927],{"class":552},[475,2157,2158],{"class":533,"line":605},[475,2159,697],{"class":552},[475,2161,2162,2165,2167],{"class":533,"line":615},[475,2163,2164],{"class":559},"  $production",[475,2166,563],{"class":552},[475,2168,592],{"class":552},[475,2170,2171,2174,2176],{"class":533,"line":634},[475,2172,2173],{"class":559},"    evlog",[475,2175,563],{"class":552},[475,2177,592],{"class":552},[475,2179,2180,2183,2185],{"class":533,"line":650},[475,2181,2182],{"class":559},"      sampling",[475,2184,563],{"class":552},[475,2186,592],{"class":552},[475,2188,2189,2192,2194],{"class":533,"line":666},[475,2190,2191],{"class":559},"        rates",[475,2193,563],{"class":552},[475,2195,592],{"class":552},[475,2197,2198,2201,2203,2205],{"class":533,"line":682},[475,2199,2200],{"class":559},"          info",[475,2202,563],{"class":552},[475,2204,624],{"class":623},[475,2206,581],{"class":552},[475,2208,2209,2212,2214,2216],{"class":533,"line":688},[475,2210,2211],{"class":559},"          warn",[475,2213,563],{"class":552},[475,2215,642],{"class":623},[475,2217,581],{"class":552},[475,2219,2220,2223,2225,2227],{"class":533,"line":694},[475,2221,2222],{"class":559},"          debug",[475,2224,563],{"class":552},[475,2226,658],{"class":623},[475,2228,581],{"class":552},[475,2230,2231,2234,2236,2238],{"class":533,"line":700},[475,2232,2233],{"class":559},"          error",[475,2235,563],{"class":552},[475,2237,674],{"class":623},[475,2239,581],{"class":552},[475,2241,2242],{"class":533,"line":1848},[475,2243,2244],{"class":552},"        },\n",[475,2246,2248,2251,2253],{"class":533,"line":2247},15,[475,2249,2250],{"class":559},"        keep",[475,2252,563],{"class":552},[475,2254,1078],{"class":548},[475,2256,2258,2261,2263,2265,2267],{"class":533,"line":2257},16,[475,2259,2260],{"class":552},"          {",[475,2262,1086],{"class":559},[475,2264,563],{"class":552},[475,2266,1091],{"class":623},[475,2268,927],{"class":552},[475,2270,2272,2274,2276,2278,2280],{"class":533,"line":2271},17,[475,2273,2260],{"class":552},[475,2275,1104],{"class":559},[475,2277,563],{"class":552},[475,2279,1109],{"class":623},[475,2281,927],{"class":552},[475,2283,2285,2287,2289,2291,2293,2295,2297],{"class":533,"line":2284},18,[475,2286,2260],{"class":552},[475,2288,1121],{"class":559},[475,2290,563],{"class":552},[475,2292,732],{"class":552},[475,2294,1128],{"class":572},[475,2296,569],{"class":552},[475,2298,927],{"class":552},[475,2300,2302,2304,2306,2308,2310,2313,2315],{"class":533,"line":2301},19,[475,2303,2260],{"class":552},[475,2305,1121],{"class":559},[475,2307,563],{"class":552},[475,2309,732],{"class":552},[475,2311,2312],{"class":572},"\u002Fapi\u002Fauth\u002F**",[475,2314,569],{"class":552},[475,2316,927],{"class":552},[475,2318,2320,2323],{"class":533,"line":2319},20,[475,2321,2322],{"class":548},"        ]",[475,2324,581],{"class":552},[475,2326,2328],{"class":533,"line":2327},21,[475,2329,685],{"class":552},[475,2331,2333],{"class":533,"line":2332},22,[475,2334,691],{"class":552},[475,2336,2338],{"class":533,"line":2337},23,[475,2339,697],{"class":552},[475,2341,2343,2345],{"class":533,"line":2342},24,[475,2344,703],{"class":552},[475,2346,706],{"class":548},[521,2348,2350],{"className":523,"code":2349,"filename":710,"language":526,"meta":527,"style":527},"import { createEvlog } from 'evlog\u002Fnext'\n\nexport const { withEvlog, useLogger } = createEvlog({\n  service: 'my-app',\n  sampling: {\n    rates: {\n      info: 10,\n      warn: 50,\n      debug: 0,\n      error: 100,\n    },\n    keep: [\n      { status: 400 },\n      { duration: 1000 },\n      { path: '\u002Fapi\u002Fpayments\u002F**' },\n      { path: '\u002Fapi\u002Fauth\u002F**' },\n    ],\n  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{ initLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'my-app' },\n  sampling: {\n    rates: {\n      info: 10,\n      warn: 50,\n      debug: 0,\n      error: 100,\n    },\n    keep: [\n      { status: 400 },\n      { duration: 1000 },\n      { path: '\u002Fapi\u002Fpayments\u002F**' },\n      { path: '\u002Fapi\u002Fauth\u002F**' },\n    ],\n  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Nuxt, use the ",[529,2753,2754],{},"$production"," override to keep full logging in development while sampling in production. 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