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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.",[544,545,548,551,577],"prompt",{":actions":546,"description":547,"icon":64},"[\"copy\",\"cursor\",\"claude\"]","Enable head and tail sampling",[540,549,550],{},"Enable head and tail sampling in my evlog production config.",[552,553,554,558,561,568,571,574],"ul",{},[555,556,557],"li",{},"Identify my framework and locate the evlog config (nuxt.config.ts, lib\u002Fevlog.ts, initLogger, etc.)",[555,559,560],{},"Configure sampling.rates per level: { info: 10, warn: 50, debug: 0, error: 100 } as a starting point",[555,562,563,564],{},"Add sampling.keep rules to force-keep critical events: ",[565,566,567],"span",{},"{ status: 400 }, { duration: 1000 }, { path: '\u002Fapi\u002Fcritical\u002F**' }",[555,569,570],{},"For business-specific keep logic (e.g. premium users), add a custom keep callback or evlog:emit:keep hook",[555,572,573],{},"Wrap sampling in a $production override so dev keeps full logging",[555,575,576],{},"Confirm errors are always kept by default unless I explicitly set error: 0",[540,578,579,580,586,587],{},"Docs: ",[581,582,583],"a",{"href":583,"rel":584},"https:\u002F\u002Fwww.evlog.dev\u002Flearn\u002Fsampling",[585],"nofollow","\nBest practices: ",[581,588,589],{"href":589,"rel":590},"https:\u002F\u002Fwww.evlog.dev\u002Freference\u002Fbest-practices",[585],[592,593,595],"h2",{"id":594},"head-sampling","Head Sampling",[540,597,598,599,603],{},"Head sampling randomly keeps a percentage of logs per level. It runs ",[600,601,602],"strong",{},"before"," the request completes, acting as a coin flip at emission time.",[605,606],"head-sampling-plinko",{},[608,609,610,797,956],"code-group",{},[611,612,618],"pre",{"className":613,"code":614,"filename":615,"language":616,"meta":617,"style":617},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","export default defineNuxtConfig({\n  modules: ['evlog\u002Fnuxt'],\n  evlog: {\n    sampling: {\n      rates: {\n        info: 10,    \u002F\u002F Keep 10% of info logs\n        warn: 50,    \u002F\u002F Keep 50% of warnings\n        debug: 0,    \u002F\u002F Drop all debug logs\n        error: 100,  \u002F\u002F Always keep errors (default)\n      },\n    },\n  },\n})\n","nuxt.config.ts","typescript","",[619,620,621,644,672,683,693,703,722,738,754,770,776,782,788],"code",{"__ignoreMap":617},[565,622,625,629,632,636,640],{"class":623,"line":624},"line",1,[565,626,628],{"class":627},"s7zQu","export",[565,630,631],{"class":627}," default",[565,633,635],{"class":634},"s2Zo4"," defineNuxtConfig",[565,637,639],{"class":638},"sTEyZ","(",[565,641,643],{"class":642},"sMK4o","{\n",[565,645,647,651,654,657,660,664,666,669],{"class":623,"line":646},2,[565,648,650],{"class":649},"swJcz","  modules",[565,652,653],{"class":642},":",[565,655,656],{"class":638}," [",[565,658,659],{"class":642},"'",[565,661,663],{"class":662},"sfazB","evlog\u002Fnuxt",[565,665,659],{"class":642},[565,667,668],{"class":638},"]",[565,670,671],{"class":642},",\n",[565,673,675,678,680],{"class":623,"line":674},3,[565,676,677],{"class":649},"  evlog",[565,679,653],{"class":642},[565,681,682],{"class":642}," {\n",[565,684,686,689,691],{"class":623,"line":685},4,[565,687,688],{"class":649},"    sampling",[565,690,653],{"class":642},[565,692,682],{"class":642},[565,694,696,699,701],{"class":623,"line":695},5,[565,697,698],{"class":649},"      rates",[565,700,653],{"class":642},[565,702,682],{"class":642},[565,704,706,709,711,715,718],{"class":623,"line":705},6,[565,707,708],{"class":649},"        info",[565,710,653],{"class":642},[565,712,714],{"class":713},"sbssI"," 10",[565,716,717],{"class":642},",",[565,719,721],{"class":720},"sHwdD","    \u002F\u002F Keep 10% of info logs\n",[565,723,725,728,730,733,735],{"class":623,"line":724},7,[565,726,727],{"class":649},"        warn",[565,729,653],{"class":642},[565,731,732],{"class":713}," 50",[565,734,717],{"class":642},[565,736,737],{"class":720},"    \u002F\u002F Keep 50% of warnings\n",[565,739,741,744,746,749,751],{"class":623,"line":740},8,[565,742,743],{"class":649},"        debug",[565,745,653],{"class":642},[565,747,748],{"class":713}," 0",[565,750,717],{"class":642},[565,752,753],{"class":720},"    \u002F\u002F Drop all debug logs\n",[565,755,757,760,762,765,767],{"class":623,"line":756},9,[565,758,759],{"class":649},"        error",[565,761,653],{"class":642},[565,763,764],{"class":713}," 100",[565,766,717],{"class":642},[565,768,769],{"class":720},"  \u002F\u002F Always keep errors (default)\n",[565,771,773],{"class":623,"line":772},10,[565,774,775],{"class":642},"      },\n",[565,777,779],{"class":623,"line":778},11,[565,780,781],{"class":642},"    },\n",[565,783,785],{"class":623,"line":784},12,[565,786,787],{"class":642},"  },\n",[565,789,791,794],{"class":623,"line":790},13,[565,792,793],{"class":642},"}",[565,795,796],{"class":638},")\n",[611,798,801],{"className":613,"code":799,"filename":800,"language":616,"meta":617,"style":617},"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)",[619,802,803,829,835,864,880,889,898,909,920,931,942,946,950],{"__ignoreMap":617},[565,804,805,808,811,814,817,820,823,826],{"class":623,"line":624},[565,806,807],{"class":627},"import",[565,809,810],{"class":642}," {",[565,812,813],{"class":638}," createEvlog",[565,815,816],{"class":642}," }",[565,818,819],{"class":627}," from",[565,821,822],{"class":642}," '",[565,824,825],{"class":662},"evlog\u002Fnext",[565,827,828],{"class":642},"'\n",[565,830,831],{"class":623,"line":646},[565,832,834],{"emptyLinePlaceholder":833},true,"\n",[565,836,837,839,843,845,848,850,853,855,858,860,862],{"class":623,"line":674},[565,838,628],{"class":627},[565,840,842],{"class":841},"spNyl"," const",[565,844,810],{"class":642},[565,846,847],{"class":638}," withEvlog",[565,849,717],{"class":642},[565,851,852],{"class":638}," useLogger ",[565,854,793],{"class":642},[565,856,857],{"class":642}," =",[565,859,813],{"class":634},[565,861,639],{"class":638},[565,863,643],{"class":642},[565,865,866,869,871,873,876,878],{"class":623,"line":685},[565,867,868],{"class":649},"  service",[565,870,653],{"class":642},[565,872,822],{"class":642},[565,874,875],{"class":662},"my-app",[565,877,659],{"class":642},[565,879,671],{"class":642},[565,881,882,885,887],{"class":623,"line":695},[565,883,884],{"class":649},"  sampling",[565,886,653],{"class":642},[565,888,682],{"class":642},[565,890,891,894,896],{"class":623,"line":705},[565,892,893],{"class":649},"    rates",[565,895,653],{"class":642},[565,897,682],{"class":642},[565,899,900,903,905,907],{"class":623,"line":724},[565,901,902],{"class":649},"      info",[565,904,653],{"class":642},[565,906,714],{"class":713},[565,908,671],{"class":642},[565,910,911,914,916,918],{"class":623,"line":740},[565,912,913],{"class":649},"      warn",[565,915,653],{"class":642},[565,917,732],{"class":713},[565,919,671],{"class":642},[565,921,922,925,927,929],{"class":623,"line":756},[565,923,924],{"class":649},"      debug",[565,926,653],{"class":642},[565,928,748],{"class":713},[565,930,671],{"class":642},[565,932,933,936,938,940],{"class":623,"line":772},[565,934,935],{"class":649},"      error",[565,937,653],{"class":642},[565,939,764],{"class":713},[565,941,671],{"class":642},[565,943,944],{"class":623,"line":778},[565,945,781],{"class":642},[565,947,948],{"class":623,"line":784},[565,949,787],{"class":642},[565,951,952,954],{"class":623,"line":790},[565,953,793],{"class":642},[565,955,796],{"class":638},[611,957,960],{"className":613,"code":958,"filename":959,"language":616,"meta":617,"style":617},"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)",[619,961,962,982,986,995,1018,1026,1034,1044,1054,1064,1074,1078,1082],{"__ignoreMap":617},[565,963,964,966,968,971,973,975,977,980],{"class":623,"line":624},[565,965,807],{"class":627},[565,967,810],{"class":642},[565,969,970],{"class":638}," initLogger",[565,972,816],{"class":642},[565,974,819],{"class":627},[565,976,822],{"class":642},[565,978,979],{"class":662},"evlog",[565,981,828],{"class":642},[565,983,984],{"class":623,"line":646},[565,985,834],{"emptyLinePlaceholder":833},[565,987,988,991,993],{"class":623,"line":674},[565,989,990],{"class":634},"initLogger",[565,992,639],{"class":638},[565,994,643],{"class":642},[565,996,997,1000,1002,1004,1007,1009,1011,1013,1015],{"class":623,"line":685},[565,998,999],{"class":649},"  env",[565,1001,653],{"class":642},[565,1003,810],{"class":642},[565,1005,1006],{"class":649}," service",[565,1008,653],{"class":642},[565,1010,822],{"class":642},[565,1012,875],{"class":662},[565,1014,659],{"class":642},[565,1016,1017],{"class":642}," },\n",[565,1019,1020,1022,1024],{"class":623,"line":695},[565,1021,884],{"class":649},[565,1023,653],{"class":642},[565,1025,682],{"class":642},[565,1027,1028,1030,1032],{"class":623,"line":705},[565,1029,893],{"class":649},[565,1031,653],{"class":642},[565,1033,682],{"class":642},[565,1035,1036,1038,1040,1042],{"class":623,"line":724},[565,1037,902],{"class":649},[565,1039,653],{"class":642},[565,1041,714],{"class":713},[565,1043,671],{"class":642},[565,1045,1046,1048,1050,1052],{"class":623,"line":740},[565,1047,913],{"class":649},[565,1049,653],{"class":642},[565,1051,732],{"class":713},[565,1053,671],{"class":642},[565,1055,1056,1058,1060,1062],{"class":623,"line":756},[565,1057,924],{"class":649},[565,1059,653],{"class":642},[565,1061,748],{"class":713},[565,1063,671],{"class":642},[565,1065,1066,1068,1070,1072],{"class":623,"line":772},[565,1067,935],{"class":649},[565,1069,653],{"class":642},[565,1071,764],{"class":713},[565,1073,671],{"class":642},[565,1075,1076],{"class":623,"line":778},[565,1077,781],{"class":642},[565,1079,1080],{"class":623,"line":784},[565,1081,787],{"class":642},[565,1083,1084,1086],{"class":623,"line":790},[565,1085,793],{"class":642},[565,1087,796],{"class":638},[540,1089,1090,1091,1094],{},"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 ",[619,1092,1093],{},"error: 0"," to drop errors.",[1096,1097,1099,1100,1103],"callout",{"color":1098,"icon":13},"info","Head sampling is random. A ",[619,1101,1102],{},"10%"," rate means roughly 1 in 10 info logs are kept, not exactly 1 in 10.",[592,1105,1107],{"id":1106},"tail-sampling","Tail Sampling",[540,1109,1110,1111,1114],{},"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 ",[600,1112,1113],{},"after"," the request completes and force-keeping logs that match specific conditions.",[611,1116,1118],{"className":613,"code":1117,"filename":615,"language":616,"meta":617,"style":617},"\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",[619,1119,1120,1125,1134,1142,1159,1169,1188,1205,1226,1233,1237],{"__ignoreMap":617},[565,1121,1122],{"class":623,"line":624},[565,1123,1124],{"class":720},"\u002F\u002F Sampling config, works the same across all frameworks\n",[565,1126,1127,1130,1132],{"class":623,"line":646},[565,1128,979],{"class":1129},"sBMFI",[565,1131,653],{"class":642},[565,1133,682],{"class":642},[565,1135,1136,1138,1140],{"class":623,"line":674},[565,1137,884],{"class":1129},[565,1139,653],{"class":642},[565,1141,682],{"class":642},[565,1143,1144,1146,1148,1150,1153,1155,1157],{"class":623,"line":685},[565,1145,893],{"class":1129},[565,1147,653],{"class":642},[565,1149,810],{"class":642},[565,1151,1152],{"class":1129}," info",[565,1154,653],{"class":642},[565,1156,714],{"class":713},[565,1158,1017],{"class":642},[565,1160,1161,1164,1166],{"class":623,"line":695},[565,1162,1163],{"class":1129},"    keep",[565,1165,653],{"class":642},[565,1167,1168],{"class":649}," [\n",[565,1170,1171,1174,1177,1179,1182,1185],{"class":623,"line":705},[565,1172,1173],{"class":642},"      {",[565,1175,1176],{"class":649}," status",[565,1178,653],{"class":642},[565,1180,1181],{"class":713}," 400",[565,1183,1184],{"class":642}," },",[565,1186,1187],{"class":720},"              \u002F\u002F HTTP status >= 400\n",[565,1189,1190,1192,1195,1197,1200,1202],{"class":623,"line":724},[565,1191,1173],{"class":642},[565,1193,1194],{"class":649}," duration",[565,1196,653],{"class":642},[565,1198,1199],{"class":713}," 1000",[565,1201,1184],{"class":642},[565,1203,1204],{"class":720},"           \u002F\u002F Request took >= 1s\n",[565,1206,1207,1209,1212,1214,1216,1219,1221,1223],{"class":623,"line":740},[565,1208,1173],{"class":642},[565,1210,1211],{"class":649}," path",[565,1213,653],{"class":642},[565,1215,822],{"class":642},[565,1217,1218],{"class":662},"\u002Fapi\u002Fpayments\u002F**",[565,1220,659],{"class":642},[565,1222,1184],{"class":642},[565,1224,1225],{"class":720}," \u002F\u002F Critical path (glob)\n",[565,1227,1228,1231],{"class":623,"line":756},[565,1229,1230],{"class":649},"    ]",[565,1232,671],{"class":642},[565,1234,1235],{"class":623,"line":772},[565,1236,787],{"class":642},[565,1238,1239],{"class":623,"line":778},[565,1240,1241],{"class":642},"}\n",[540,1243,1244,1245,1248,1249,1252,1253,1256,1257,1260,1261,1264],{},"Conditions use ",[600,1246,1247],{},">="," comparison for ",[619,1250,1251],{},"status"," and ",[619,1254,1255],{},"duration",", and glob matching for ",[619,1258,1259],{},"path",". If ",[600,1262,1263],{},"any"," condition matches, the log is kept regardless of head sampling (OR logic).",[1266,1267,1269],"h3",{"id":1268},"available-conditions","Available Conditions",[1271,1272,1273,1289],"table",{},[1274,1275,1276],"thead",{},[1277,1278,1279,1283,1286],"tr",{},[1280,1281,1282],"th",{},"Condition",[1280,1284,1285],{},"Type",[1280,1287,1288],{},"Description",[1290,1291,1292,1311,1324],"tbody",{},[1277,1293,1294,1299,1304],{},[1295,1296,1297],"td",{},[619,1298,1251],{},[1295,1300,1301],{},[619,1302,1303],{},"number",[1295,1305,1306,1307,1310],{},"Keep if HTTP status >= value (e.g., ",[619,1308,1309],{},"400"," catches all 4xx and 5xx)",[1277,1312,1313,1317,1321],{},[1295,1314,1315],{},[619,1316,1255],{},[1295,1318,1319],{},[619,1320,1303],{},[1295,1322,1323],{},"Keep if request duration >= value in milliseconds",[1277,1325,1326,1330,1335],{},[1295,1327,1328],{},[619,1329,1259],{},[1295,1331,1332],{},[619,1333,1334],{},"string",[1295,1336,1337,1338,1341],{},"Keep if request path matches glob pattern (e.g., ",[619,1339,1340],{},"'\u002Fapi\u002Fcritical\u002F**'",")",[592,1343,1345],{"id":1344},"how-they-work-together","How They Work Together",[540,1347,1348],{},"The two tiers complement each other:",[1350,1351,1352,1358,1368,1374],"ol",{},[555,1353,1354,1357],{},[600,1355,1356],{},"Request completes"," - evlog knows the status, duration, and path",[555,1359,1360,1363,1364,1367],{},[600,1361,1362],{},"Tail sampling evaluates"," - if any ",[619,1365,1366],{},"keep"," condition matches, the log is force-kept",[555,1369,1370,1373],{},[600,1371,1372],{},"Head sampling applies"," - only if tail sampling didn't force-keep, the random percentage check runs",[555,1375,1376,1379],{},[600,1377,1378],{},"Log emits or drops"," - kept logs go through enrichment and draining as normal",[540,1381,1382,1383,1386,1387,1389],{},"This means a request to ",[619,1384,1385],{},"\u002Fapi\u002Fpayments\u002Fcharge"," that returns a 500 in 2 seconds will always be logged, even if ",[619,1388,1098],{}," is set to 1%. The tail conditions rescue it.",[1391,1392],"tail-sample-decision",{},[608,1394,1395,1471],{},[611,1396,1398],{"className":613,"code":1397,"filename":504,"language":616,"meta":617,"style":617},"sampling: {\n  rates: { info: 10 },\n  keep: [\n    { status: 400 },\n    { duration: 1000 },\n  ],\n}\n",[619,1399,1400,1409,1426,1435,1448,1460,1467],{"__ignoreMap":617},[565,1401,1402,1405,1407],{"class":623,"line":624},[565,1403,1404],{"class":1129},"sampling",[565,1406,653],{"class":642},[565,1408,682],{"class":642},[565,1410,1411,1414,1416,1418,1420,1422,1424],{"class":623,"line":646},[565,1412,1413],{"class":1129},"  rates",[565,1415,653],{"class":642},[565,1417,810],{"class":642},[565,1419,1152],{"class":1129},[565,1421,653],{"class":642},[565,1423,714],{"class":713},[565,1425,1017],{"class":642},[565,1427,1428,1431,1433],{"class":623,"line":674},[565,1429,1430],{"class":1129},"  keep",[565,1432,653],{"class":642},[565,1434,1168],{"class":649},[565,1436,1437,1440,1442,1444,1446],{"class":623,"line":685},[565,1438,1439],{"class":642},"    {",[565,1441,1176],{"class":649},[565,1443,653],{"class":642},[565,1445,1181],{"class":713},[565,1447,1017],{"class":642},[565,1449,1450,1452,1454,1456,1458],{"class":623,"line":695},[565,1451,1439],{"class":642},[565,1453,1194],{"class":649},[565,1455,653],{"class":642},[565,1457,1199],{"class":713},[565,1459,1017],{"class":642},[565,1461,1462,1465],{"class":623,"line":705},[565,1463,1464],{"class":649},"  ]",[565,1466,671],{"class":642},[565,1468,1469],{"class":623,"line":724},[565,1470,1241],{"class":642},[611,1472,1477],{"className":1473,"code":1474,"filename":1475,"language":1476,"meta":617,"style":617},"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",[619,1478,1479,1509,1541,1573],{"__ignoreMap":617},[565,1480,1481,1484,1487,1490,1493,1496,1499,1502,1505,1507],{"class":623,"line":624},[565,1482,1483],{"class":1129},"POST",[565,1485,1486],{"class":662}," \u002Fapi\u002Fusers",[565,1488,1489],{"class":713},"     200",[565,1491,1492],{"class":662},"  45ms",[565,1494,1495],{"class":662},"   →",[565,1497,1498],{"class":662}," 10%",[565,1500,1501],{"class":662}," chance",[565,1503,1504],{"class":638}," (head ",[565,1506,1404],{"class":662},[565,1508,796],{"class":638},[565,1510,1511,1513,1515,1518,1520,1522,1525,1528,1531,1534,1537,1539],{"class":623,"line":646},[565,1512,1483],{"class":1129},[565,1514,1486],{"class":662},[565,1516,1517],{"class":713},"     500",[565,1519,1492],{"class":662},[565,1521,1495],{"class":662},[565,1523,1524],{"class":662}," always",[565,1526,1527],{"class":662}," kept",[565,1529,1530],{"class":638}," (status ",[565,1532,1533],{"class":642},">",[565,1535,1536],{"class":662},"=",[565,1538,1181],{"class":713},[565,1540,796],{"class":638},[565,1542,1543,1546,1549,1552,1555,1558,1560,1562,1565,1567,1569,1571],{"class":623,"line":674},[565,1544,1545],{"class":1129},"GET",[565,1547,1548],{"class":662},"  \u002Fapi\u002Fproducts",[565,1550,1551],{"class":713},"  200",[565,1553,1554],{"class":662},"  2300ms",[565,1556,1557],{"class":662}," →",[565,1559,1524],{"class":662},[565,1561,1527],{"class":662},[565,1563,1564],{"class":638}," (duration ",[565,1566,1533],{"class":642},[565,1568,1536],{"class":662},[565,1570,1199],{"class":713},[565,1572,796],{"class":638},[565,1574,1575,1577,1580,1582,1585,1588,1590,1592,1594,1596],{"class":623,"line":685},[565,1576,1483],{"class":1129},[565,1578,1579],{"class":662}," \u002Fapi\u002Fcheckout",[565,1581,1551],{"class":713},[565,1583,1584],{"class":662},"  120ms",[565,1586,1587],{"class":662},"  →",[565,1589,1498],{"class":662},[565,1591,1501],{"class":662},[565,1593,1504],{"class":638},[565,1595,1404],{"class":662},[565,1597,796],{"class":638},[592,1599,1601],{"id":1600},"custom-tail-sampling","Custom Tail Sampling",[540,1603,1604,1605,1608,1609,1611],{},"For conditions beyond status, duration, and path, use the ",[619,1606,1607],{},"evlog:emit:keep"," hook in Nuxt\u002FNitro or the ",[619,1610,1366],{}," callback in other frameworks.",[608,1613,1614,1756,1943],{},[611,1615,1618],{"className":613,"code":1616,"filename":1617,"language":616,"meta":617,"style":617},"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)",[619,1619,1620,1644,1682,1722,1738,1743,1750],{"__ignoreMap":617},[565,1621,1622,1624,1626,1629,1631,1633,1637,1639,1642],{"class":623,"line":624},[565,1623,628],{"class":627},[565,1625,631],{"class":627},[565,1627,1628],{"class":634}," defineNitroPlugin",[565,1630,639],{"class":638},[565,1632,639],{"class":642},[565,1634,1636],{"class":1635},"sHdIc","nitroApp",[565,1638,1341],{"class":642},[565,1640,1641],{"class":841}," =>",[565,1643,682],{"class":642},[565,1645,1646,1649,1652,1655,1657,1660,1662,1664,1666,1668,1670,1673,1676,1678,1680],{"class":623,"line":646},[565,1647,1648],{"class":638},"  nitroApp",[565,1650,1651],{"class":642},".",[565,1653,1654],{"class":638},"hooks",[565,1656,1651],{"class":642},[565,1658,1659],{"class":634},"hook",[565,1661,639],{"class":649},[565,1663,659],{"class":642},[565,1665,1607],{"class":662},[565,1667,659],{"class":642},[565,1669,717],{"class":642},[565,1671,1672],{"class":642}," (",[565,1674,1675],{"class":1635},"ctx",[565,1677,1341],{"class":642},[565,1679,1641],{"class":841},[565,1681,682],{"class":642},[565,1683,1684,1687,1689,1691,1693,1696,1698,1701,1704,1707,1710,1712,1715,1717,1720],{"class":623,"line":674},[565,1685,1686],{"class":627},"    if",[565,1688,1672],{"class":649},[565,1690,1675],{"class":638},[565,1692,1651],{"class":642},[565,1694,1695],{"class":638},"context",[565,1697,1651],{"class":642},[565,1699,1700],{"class":638},"user",[565,1702,1703],{"class":642},"?.",[565,1705,1706],{"class":638},"plan",[565,1708,1709],{"class":642}," ===",[565,1711,822],{"class":642},[565,1713,1714],{"class":662},"enterprise",[565,1716,659],{"class":642},[565,1718,1719],{"class":649},") ",[565,1721,643],{"class":642},[565,1723,1724,1727,1729,1732,1734],{"class":623,"line":685},[565,1725,1726],{"class":638},"      ctx",[565,1728,1651],{"class":642},[565,1730,1731],{"class":638},"shouldKeep",[565,1733,857],{"class":642},[565,1735,1737],{"class":1736},"sfNiH"," true\n",[565,1739,1740],{"class":623,"line":695},[565,1741,1742],{"class":642},"    }\n",[565,1744,1745,1748],{"class":623,"line":705},[565,1746,1747],{"class":642},"  }",[565,1749,796],{"class":649},[565,1751,1752,1754],{"class":623,"line":724},[565,1753,793],{"class":642},[565,1755,796],{"class":638},[611,1757,1759],{"className":613,"code":1758,"filename":800,"language":616,"meta":617,"style":617},"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",[619,1760,1761,1779,1783,1807,1821,1829,1845,1868,1872,1884,1916,1928,1932,1936],{"__ignoreMap":617},[565,1762,1763,1765,1767,1769,1771,1773,1775,1777],{"class":623,"line":624},[565,1764,807],{"class":627},[565,1766,810],{"class":642},[565,1768,813],{"class":638},[565,1770,816],{"class":642},[565,1772,819],{"class":627},[565,1774,822],{"class":642},[565,1776,825],{"class":662},[565,1778,828],{"class":642},[565,1780,1781],{"class":623,"line":646},[565,1782,834],{"emptyLinePlaceholder":833},[565,1784,1785,1787,1789,1791,1793,1795,1797,1799,1801,1803,1805],{"class":623,"line":674},[565,1786,628],{"class":627},[565,1788,842],{"class":841},[565,1790,810],{"class":642},[565,1792,847],{"class":638},[565,1794,717],{"class":642},[565,1796,852],{"class":638},[565,1798,793],{"class":642},[565,1800,857],{"class":642},[565,1802,813],{"class":634},[565,1804,639],{"class":638},[565,1806,643],{"class":642},[565,1808,1809,1811,1813,1815,1817,1819],{"class":623,"line":685},[565,1810,868],{"class":649},[565,1812,653],{"class":642},[565,1814,822],{"class":642},[565,1816,875],{"class":662},[565,1818,659],{"class":642},[565,1820,671],{"class":642},[565,1822,1823,1825,1827],{"class":623,"line":695},[565,1824,884],{"class":649},[565,1826,653],{"class":642},[565,1828,682],{"class":642},[565,1830,1831,1833,1835,1837,1839,1841,1843],{"class":623,"line":705},[565,1832,893],{"class":649},[565,1834,653],{"class":642},[565,1836,810],{"class":642},[565,1838,1152],{"class":649},[565,1840,653],{"class":642},[565,1842,714],{"class":713},[565,1844,1017],{"class":642},[565,1846,1847,1849,1851,1853,1856,1858,1860,1862,1864,1866],{"class":623,"line":724},[565,1848,1163],{"class":649},[565,1850,653],{"class":642},[565,1852,656],{"class":638},[565,1854,1855],{"class":642},"{",[565,1857,1176],{"class":649},[565,1859,653],{"class":642},[565,1861,1181],{"class":713},[565,1863,816],{"class":642},[565,1865,668],{"class":638},[565,1867,671],{"class":642},[565,1869,1870],{"class":623,"line":740},[565,1871,787],{"class":642},[565,1873,1874,1876,1878,1880,1882],{"class":623,"line":756},[565,1875,1430],{"class":649},[565,1877,639],{"class":642},[565,1879,1675],{"class":1635},[565,1881,1341],{"class":642},[565,1883,682],{"class":642},[565,1885,1886,1888,1890,1892,1894,1896,1898,1900,1902,1904,1906,1908,1910,1912,1914],{"class":623,"line":772},[565,1887,1686],{"class":627},[565,1889,1672],{"class":649},[565,1891,1675],{"class":638},[565,1893,1651],{"class":642},[565,1895,1695],{"class":638},[565,1897,1651],{"class":642},[565,1899,1700],{"class":638},[565,1901,1703],{"class":642},[565,1903,1706],{"class":638},[565,1905,1709],{"class":642},[565,1907,822],{"class":642},[565,1909,1714],{"class":662},[565,1911,659],{"class":642},[565,1913,1719],{"class":649},[565,1915,643],{"class":642},[565,1917,1918,1920,1922,1924,1926],{"class":623,"line":778},[565,1919,1726],{"class":638},[565,1921,1651],{"class":642},[565,1923,1731],{"class":638},[565,1925,857],{"class":642},[565,1927,1737],{"class":1736},[565,1929,1930],{"class":623,"line":784},[565,1931,1742],{"class":642},[565,1933,1934],{"class":623,"line":790},[565,1935,787],{"class":642},[565,1937,1939,1941],{"class":623,"line":1938},14,[565,1940,793],{"class":642},[565,1942,796],{"class":638},[611,1944,1947],{"className":613,"code":1945,"filename":1946,"language":616,"meta":617,"style":617},"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)",[619,1948,1949,1969,1973,1991,2003,2035,2047,2051,2055],{"__ignoreMap":617},[565,1950,1951,1953,1955,1958,1960,1962,1964,1967],{"class":623,"line":624},[565,1952,807],{"class":627},[565,1954,810],{"class":642},[565,1956,1957],{"class":638}," evlog",[565,1959,816],{"class":642},[565,1961,819],{"class":627},[565,1963,822],{"class":642},[565,1965,1966],{"class":662},"evlog\u002Fhono",[565,1968,828],{"class":642},[565,1970,1971],{"class":623,"line":646},[565,1972,834],{"emptyLinePlaceholder":833},[565,1974,1975,1978,1980,1983,1985,1987,1989],{"class":623,"line":674},[565,1976,1977],{"class":638},"app",[565,1979,1651],{"class":642},[565,1981,1982],{"class":634},"use",[565,1984,639],{"class":638},[565,1986,979],{"class":634},[565,1988,639],{"class":638},[565,1990,643],{"class":642},[565,1992,1993,1995,1997,1999,2001],{"class":623,"line":685},[565,1994,1430],{"class":649},[565,1996,639],{"class":642},[565,1998,1675],{"class":1635},[565,2000,1341],{"class":642},[565,2002,682],{"class":642},[565,2004,2005,2007,2009,2011,2013,2015,2017,2019,2021,2023,2025,2027,2029,2031,2033],{"class":623,"line":695},[565,2006,1686],{"class":627},[565,2008,1672],{"class":649},[565,2010,1675],{"class":638},[565,2012,1651],{"class":642},[565,2014,1695],{"class":638},[565,2016,1651],{"class":642},[565,2018,1700],{"class":638},[565,2020,1703],{"class":642},[565,2022,1706],{"class":638},[565,2024,1709],{"class":642},[565,2026,822],{"class":642},[565,2028,1714],{"class":662},[565,2030,659],{"class":642},[565,2032,1719],{"class":649},[565,2034,643],{"class":642},[565,2036,2037,2039,2041,2043,2045],{"class":623,"line":705},[565,2038,1726],{"class":638},[565,2040,1651],{"class":642},[565,2042,1731],{"class":638},[565,2044,857],{"class":642},[565,2046,1737],{"class":1736},[565,2048,2049],{"class":623,"line":724},[565,2050,1742],{"class":642},[565,2052,2053],{"class":623,"line":740},[565,2054,787],{"class":642},[565,2056,2057,2059],{"class":623,"line":756},[565,2058,793],{"class":642},[565,2060,2061],{"class":638},"))\n",[540,2063,2064,2065,2067],{},"The ",[619,2066,1675],{}," object contains:",[1271,2069,2070,2081],{},[1274,2071,2072],{},[1277,2073,2074,2077,2079],{},[1280,2075,2076],{},"Field",[1280,2078,1285],{},[1280,2080,1288],{},[1290,2082,2083,2097,2110,2124,2138,2155],{},[1277,2084,2085,2089,2094],{},[1295,2086,2087],{},[619,2088,1251],{},[1295,2090,2091],{},[619,2092,2093],{},"number | undefined",[1295,2095,2096],{},"HTTP response status",[1277,2098,2099,2103,2107],{},[1295,2100,2101],{},[619,2102,1255],{},[1295,2104,2105],{},[619,2106,2093],{},[1295,2108,2109],{},"Request duration in ms",[1277,2111,2112,2116,2121],{},[1295,2113,2114],{},[619,2115,1259],{},[1295,2117,2118],{},[619,2119,2120],{},"string | undefined",[1295,2122,2123],{},"Request path",[1277,2125,2126,2131,2135],{},[1295,2127,2128],{},[619,2129,2130],{},"method",[1295,2132,2133],{},[619,2134,2120],{},[1295,2136,2137],{},"HTTP method",[1277,2139,2140,2144,2149],{},[1295,2141,2142],{},[619,2143,1695],{},[1295,2145,2146],{},[619,2147,2148],{},"Record\u003Cstring, unknown>",[1295,2150,2151,2152],{},"All fields set via ",[619,2153,2154],{},"log.set()",[1277,2156,2157,2161,2166],{},[1295,2158,2159],{},[619,2160,1731],{},[1295,2162,2163],{},[619,2164,2165],{},"boolean",[1295,2167,2168,2169,2172],{},"Set to ",[619,2170,2171],{},"true"," to force-keep",[592,2174,2176],{"id":2175},"production-example","Production Example",[540,2178,2179],{},"A typical production configuration that balances cost and visibility:",[608,2181,2182,2437,2642],{},[611,2183,2185],{"className":613,"code":2184,"filename":615,"language":616,"meta":617,"style":617},"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",[619,2186,2187,2199,2217,2225,2246,2250,2259,2268,2277,2286,2297,2308,2319,2330,2335,2345,2359,2372,2389,2407,2415,2420,2425,2430],{"__ignoreMap":617},[565,2188,2189,2191,2193,2195,2197],{"class":623,"line":624},[565,2190,628],{"class":627},[565,2192,631],{"class":627},[565,2194,635],{"class":634},[565,2196,639],{"class":638},[565,2198,643],{"class":642},[565,2200,2201,2203,2205,2207,2209,2211,2213,2215],{"class":623,"line":646},[565,2202,650],{"class":649},[565,2204,653],{"class":642},[565,2206,656],{"class":638},[565,2208,659],{"class":642},[565,2210,663],{"class":662},[565,2212,659],{"class":642},[565,2214,668],{"class":638},[565,2216,671],{"class":642},[565,2218,2219,2221,2223],{"class":623,"line":674},[565,2220,677],{"class":649},[565,2222,653],{"class":642},[565,2224,682],{"class":642},[565,2226,2227,2230,2232,2234,2236,2238,2240,2242,2244],{"class":623,"line":685},[565,2228,2229],{"class":649},"    env",[565,2231,653],{"class":642},[565,2233,810],{"class":642},[565,2235,1006],{"class":649},[565,2237,653],{"class":642},[565,2239,822],{"class":642},[565,2241,875],{"class":662},[565,2243,659],{"class":642},[565,2245,1017],{"class":642},[565,2247,2248],{"class":623,"line":695},[565,2249,787],{"class":642},[565,2251,2252,2255,2257],{"class":623,"line":705},[565,2253,2254],{"class":649},"  $production",[565,2256,653],{"class":642},[565,2258,682],{"class":642},[565,2260,2261,2264,2266],{"class":623,"line":724},[565,2262,2263],{"class":649},"    evlog",[565,2265,653],{"class":642},[565,2267,682],{"class":642},[565,2269,2270,2273,2275],{"class":623,"line":740},[565,2271,2272],{"class":649},"      sampling",[565,2274,653],{"class":642},[565,2276,682],{"class":642},[565,2278,2279,2282,2284],{"class":623,"line":756},[565,2280,2281],{"class":649},"        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       keep",[565,2342,653],{"class":642},[565,2344,1168],{"class":638},[565,2346,2348,2351,2353,2355,2357],{"class":623,"line":2347},16,[565,2349,2350],{"class":642},"          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