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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.",[525,526,529,532,558],"prompt",{":actions":527,"description":528,"icon":64},"[\"copy\",\"cursor\",\"claude\"]","Enable head and tail sampling",[521,530,531],{},"Enable head and tail sampling in my evlog production config.",[533,534,535,539,542,549,552,555],"ul",{},[536,537,538],"li",{},"Identify my framework and locate the evlog config (nuxt.config.ts, lib\u002Fevlog.ts, initLogger, etc.)",[536,540,541],{},"Configure sampling.rates per level: { info: 10, warn: 50, debug: 0, error: 100 } as a starting point",[536,543,544,545],{},"Add sampling.keep rules to force-keep critical events: ",[546,547,548],"span",{},"{ status: 400 }, { duration: 1000 }, { path: '\u002Fapi\u002Fcritical\u002F**' }",[536,550,551],{},"For business-specific keep logic (e.g. premium users), add a custom keep callback or evlog:emit:keep hook",[536,553,554],{},"Wrap sampling in a $production override so dev keeps full logging",[536,556,557],{},"Confirm errors are always kept by default unless I explicitly set error: 0",[521,559,560,561,567,568],{},"Docs: ",[562,563,564],"a",{"href":564,"rel":565},"https:\u002F\u002Fwww.evlog.dev\u002Flearn\u002Fsampling",[566],"nofollow","\nBest practices: ",[562,569,570],{"href":570,"rel":571},"https:\u002F\u002Fwww.evlog.dev\u002Freference\u002Fbest-practices",[566],[573,574,576],"h2",{"id":575},"head-sampling","Head Sampling",[521,578,579,580,584],{},"Head sampling randomly keeps a percentage of logs per level. It runs ",[581,582,583],"strong",{},"before"," the request completes, acting as a coin flip at emission time.",[586,587],"head-sampling-plinko",{},[589,590,591,778,937],"code-group",{},[592,593,599],"pre",{"className":594,"code":595,"filename":596,"language":597,"meta":598,"style":598},"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","",[600,601,602,625,653,664,674,684,703,719,735,751,757,763,769],"code",{"__ignoreMap":598},[546,603,606,610,613,617,621],{"class":604,"line":605},"line",1,[546,607,609],{"class":608},"s7zQu","export",[546,611,612],{"class":608}," default",[546,614,616],{"class":615},"s2Zo4"," defineNuxtConfig",[546,618,620],{"class":619},"sTEyZ","(",[546,622,624],{"class":623},"sMK4o","{\n",[546,626,628,632,635,638,641,645,647,650],{"class":604,"line":627},2,[546,629,631],{"class":630},"swJcz","  modules",[546,633,634],{"class":623},":",[546,636,637],{"class":619}," [",[546,639,640],{"class":623},"'",[546,642,644],{"class":643},"sfazB","evlog\u002Fnuxt",[546,646,640],{"class":623},[546,648,649],{"class":619},"]",[546,651,652],{"class":623},",\n",[546,654,656,659,661],{"class":604,"line":655},3,[546,657,658],{"class":630},"  evlog",[546,660,634],{"class":623},[546,662,663],{"class":623}," {\n",[546,665,667,670,672],{"class":604,"line":666},4,[546,668,669],{"class":630},"    sampling",[546,671,634],{"class":623},[546,673,663],{"class":623},[546,675,677,680,682],{"class":604,"line":676},5,[546,678,679],{"class":630},"      rates",[546,681,634],{"class":623},[546,683,663],{"class":623},[546,685,687,690,692,696,699],{"class":604,"line":686},6,[546,688,689],{"class":630},"        info",[546,691,634],{"class":623},[546,693,695],{"class":694},"sbssI"," 10",[546,697,698],{"class":623},",",[546,700,702],{"class":701},"sHwdD","    \u002F\u002F Keep 10% of info logs\n",[546,704,706,709,711,714,716],{"class":604,"line":705},7,[546,707,708],{"class":630},"        warn",[546,710,634],{"class":623},[546,712,713],{"class":694}," 50",[546,715,698],{"class":623},[546,717,718],{"class":701},"    \u002F\u002F Keep 50% of warnings\n",[546,720,722,725,727,730,732],{"class":604,"line":721},8,[546,723,724],{"class":630},"        debug",[546,726,634],{"class":623},[546,728,729],{"class":694}," 0",[546,731,698],{"class":623},[546,733,734],{"class":701},"    \u002F\u002F Drop all debug logs\n",[546,736,738,741,743,746,748],{"class":604,"line":737},9,[546,739,740],{"class":630},"        error",[546,742,634],{"class":623},[546,744,745],{"class":694}," 100",[546,747,698],{"class":623},[546,749,750],{"class":701},"  \u002F\u002F Always keep errors (default)\n",[546,752,754],{"class":604,"line":753},10,[546,755,756],{"class":623},"      },\n",[546,758,760],{"class":604,"line":759},11,[546,761,762],{"class":623},"    },\n",[546,764,766],{"class":604,"line":765},12,[546,767,768],{"class":623},"  },\n",[546,770,772,775],{"class":604,"line":771},13,[546,773,774],{"class":623},"}",[546,776,777],{"class":619},")\n",[592,779,782],{"className":594,"code":780,"filename":781,"language":597,"meta":598,"style":598},"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)",[600,783,784,810,816,845,861,870,879,890,901,912,923,927,931],{"__ignoreMap":598},[546,785,786,789,792,795,798,801,804,807],{"class":604,"line":605},[546,787,788],{"class":608},"import",[546,790,791],{"class":623}," {",[546,793,794],{"class":619}," createEvlog",[546,796,797],{"class":623}," }",[546,799,800],{"class":608}," from",[546,802,803],{"class":623}," '",[546,805,806],{"class":643},"evlog\u002Fnext",[546,808,809],{"class":623},"'\n",[546,811,812],{"class":604,"line":627},[546,813,815],{"emptyLinePlaceholder":814},true,"\n",[546,817,818,820,824,826,829,831,834,836,839,841,843],{"class":604,"line":655},[546,819,609],{"class":608},[546,821,823],{"class":822},"spNyl"," const",[546,825,791],{"class":623},[546,827,828],{"class":619}," withEvlog",[546,830,698],{"class":623},[546,832,833],{"class":619}," useLogger ",[546,835,774],{"class":623},[546,837,838],{"class":623}," =",[546,840,794],{"class":615},[546,842,620],{"class":619},[546,844,624],{"class":623},[546,846,847,850,852,854,857,859],{"class":604,"line":666},[546,848,849],{"class":630},"  service",[546,851,634],{"class":623},[546,853,803],{"class":623},[546,855,856],{"class":643},"my-app",[546,858,640],{"class":623},[546,860,652],{"class":623},[546,862,863,866,868],{"class":604,"line":676},[546,864,865],{"class":630},"  sampling",[546,867,634],{"class":623},[546,869,663],{"class":623},[546,871,872,875,877],{"class":604,"line":686},[546,873,874],{"class":630},"    rates",[546,876,634],{"class":623},[546,878,663],{"class":623},[546,880,881,884,886,888],{"class":604,"line":705},[546,882,883],{"class":630},"      info",[546,885,634],{"class":623},[546,887,695],{"class":694},[546,889,652],{"class":623},[546,891,892,895,897,899],{"class":604,"line":721},[546,893,894],{"class":630},"      warn",[546,896,634],{"class":623},[546,898,713],{"class":694},[546,900,652],{"class":623},[546,902,903,906,908,910],{"class":604,"line":737},[546,904,905],{"class":630},"      debug",[546,907,634],{"class":623},[546,909,729],{"class":694},[546,911,652],{"class":623},[546,913,914,917,919,921],{"class":604,"line":753},[546,915,916],{"class":630},"      error",[546,918,634],{"class":623},[546,920,745],{"class":694},[546,922,652],{"class":623},[546,924,925],{"class":604,"line":759},[546,926,762],{"class":623},[546,928,929],{"class":604,"line":765},[546,930,768],{"class":623},[546,932,933,935],{"class":604,"line":771},[546,934,774],{"class":623},[546,936,777],{"class":619},[592,938,941],{"className":594,"code":939,"filename":940,"language":597,"meta":598,"style":598},"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)",[600,942,943,963,967,976,999,1007,1015,1025,1035,1045,1055,1059,1063],{"__ignoreMap":598},[546,944,945,947,949,952,954,956,958,961],{"class":604,"line":605},[546,946,788],{"class":608},[546,948,791],{"class":623},[546,950,951],{"class":619}," initLogger",[546,953,797],{"class":623},[546,955,800],{"class":608},[546,957,803],{"class":623},[546,959,960],{"class":643},"evlog",[546,962,809],{"class":623},[546,964,965],{"class":604,"line":627},[546,966,815],{"emptyLinePlaceholder":814},[546,968,969,972,974],{"class":604,"line":655},[546,970,971],{"class":615},"initLogger",[546,973,620],{"class":619},[546,975,624],{"class":623},[546,977,978,981,983,985,988,990,992,994,996],{"class":604,"line":666},[546,979,980],{"class":630},"  env",[546,982,634],{"class":623},[546,984,791],{"class":623},[546,986,987],{"class":630}," service",[546,989,634],{"class":623},[546,991,803],{"class":623},[546,993,856],{"class":643},[546,995,640],{"class":623},[546,997,998],{"class":623}," },\n",[546,1000,1001,1003,1005],{"class":604,"line":676},[546,1002,865],{"class":630},[546,1004,634],{"class":623},[546,1006,663],{"class":623},[546,1008,1009,1011,1013],{"class":604,"line":686},[546,1010,874],{"class":630},[546,1012,634],{"class":623},[546,1014,663],{"class":623},[546,1016,1017,1019,1021,1023],{"class":604,"line":705},[546,1018,883],{"class":630},[546,1020,634],{"class":623},[546,1022,695],{"class":694},[546,1024,652],{"class":623},[546,1026,1027,1029,1031,1033],{"class":604,"line":721},[546,1028,894],{"class":630},[546,1030,634],{"class":623},[546,1032,713],{"class":694},[546,1034,652],{"class":623},[546,1036,1037,1039,1041,1043],{"class":604,"line":737},[546,1038,905],{"class":630},[546,1040,634],{"class":623},[546,1042,729],{"class":694},[546,1044,652],{"class":623},[546,1046,1047,1049,1051,1053],{"class":604,"line":753},[546,1048,916],{"class":630},[546,1050,634],{"class":623},[546,1052,745],{"class":694},[546,1054,652],{"class":623},[546,1056,1057],{"class":604,"line":759},[546,1058,762],{"class":623},[546,1060,1061],{"class":604,"line":765},[546,1062,768],{"class":623},[546,1064,1065,1067],{"class":604,"line":771},[546,1066,774],{"class":623},[546,1068,777],{"class":619},[521,1070,1071,1072,1075],{},"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 ",[600,1073,1074],{},"error: 0"," to drop errors.",[1077,1078,1080,1081,1084],"callout",{"color":1079,"icon":13},"info","Head sampling is random. A ",[600,1082,1083],{},"10%"," rate means roughly 1 in 10 info logs are kept, not exactly 1 in 10.",[573,1086,1088],{"id":1087},"tail-sampling","Tail Sampling",[521,1090,1091,1092,1095],{},"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 ",[581,1093,1094],{},"after"," the request completes and force-keeping logs that match specific conditions.",[592,1097,1099],{"className":594,"code":1098,"filename":596,"language":597,"meta":598,"style":598},"\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",[600,1100,1101,1106,1115,1123,1140,1150,1169,1186,1207,1214,1218],{"__ignoreMap":598},[546,1102,1103],{"class":604,"line":605},[546,1104,1105],{"class":701},"\u002F\u002F Sampling config, works the same across all frameworks\n",[546,1107,1108,1111,1113],{"class":604,"line":627},[546,1109,960],{"class":1110},"sBMFI",[546,1112,634],{"class":623},[546,1114,663],{"class":623},[546,1116,1117,1119,1121],{"class":604,"line":655},[546,1118,865],{"class":1110},[546,1120,634],{"class":623},[546,1122,663],{"class":623},[546,1124,1125,1127,1129,1131,1134,1136,1138],{"class":604,"line":666},[546,1126,874],{"class":1110},[546,1128,634],{"class":623},[546,1130,791],{"class":623},[546,1132,1133],{"class":1110}," info",[546,1135,634],{"class":623},[546,1137,695],{"class":694},[546,1139,998],{"class":623},[546,1141,1142,1145,1147],{"class":604,"line":676},[546,1143,1144],{"class":1110},"    keep",[546,1146,634],{"class":623},[546,1148,1149],{"class":630}," [\n",[546,1151,1152,1155,1158,1160,1163,1166],{"class":604,"line":686},[546,1153,1154],{"class":623},"      {",[546,1156,1157],{"class":630}," status",[546,1159,634],{"class":623},[546,1161,1162],{"class":694}," 400",[546,1164,1165],{"class":623}," },",[546,1167,1168],{"class":701},"              \u002F\u002F HTTP status >= 400\n",[546,1170,1171,1173,1176,1178,1181,1183],{"class":604,"line":705},[546,1172,1154],{"class":623},[546,1174,1175],{"class":630}," duration",[546,1177,634],{"class":623},[546,1179,1180],{"class":694}," 1000",[546,1182,1165],{"class":623},[546,1184,1185],{"class":701},"           \u002F\u002F Request took >= 1s\n",[546,1187,1188,1190,1193,1195,1197,1200,1202,1204],{"class":604,"line":721},[546,1189,1154],{"class":623},[546,1191,1192],{"class":630}," path",[546,1194,634],{"class":623},[546,1196,803],{"class":623},[546,1198,1199],{"class":643},"\u002Fapi\u002Fpayments\u002F**",[546,1201,640],{"class":623},[546,1203,1165],{"class":623},[546,1205,1206],{"class":701}," \u002F\u002F Critical path (glob)\n",[546,1208,1209,1212],{"class":604,"line":737},[546,1210,1211],{"class":630},"    ]",[546,1213,652],{"class":623},[546,1215,1216],{"class":604,"line":753},[546,1217,768],{"class":623},[546,1219,1220],{"class":604,"line":759},[546,1221,1222],{"class":623},"}\n",[521,1224,1225,1226,1229,1230,1233,1234,1237,1238,1241,1242,1245],{},"Conditions use ",[581,1227,1228],{},">="," comparison for ",[600,1231,1232],{},"status"," and ",[600,1235,1236],{},"duration",", and glob matching for ",[600,1239,1240],{},"path",". If ",[581,1243,1244],{},"any"," condition matches, the log is kept regardless of head sampling (OR logic).",[1247,1248,1250],"h3",{"id":1249},"available-conditions","Available Conditions",[1252,1253,1254,1270],"table",{},[1255,1256,1257],"thead",{},[1258,1259,1260,1264,1267],"tr",{},[1261,1262,1263],"th",{},"Condition",[1261,1265,1266],{},"Type",[1261,1268,1269],{},"Description",[1271,1272,1273,1292,1305],"tbody",{},[1258,1274,1275,1280,1285],{},[1276,1277,1278],"td",{},[600,1279,1232],{},[1276,1281,1282],{},[600,1283,1284],{},"number",[1276,1286,1287,1288,1291],{},"Keep if HTTP status >= value (e.g., ",[600,1289,1290],{},"400"," catches all 4xx and 5xx)",[1258,1293,1294,1298,1302],{},[1276,1295,1296],{},[600,1297,1236],{},[1276,1299,1300],{},[600,1301,1284],{},[1276,1303,1304],{},"Keep if request duration >= value in milliseconds",[1258,1306,1307,1311,1316],{},[1276,1308,1309],{},[600,1310,1240],{},[1276,1312,1313],{},[600,1314,1315],{},"string",[1276,1317,1318,1319,1322],{},"Keep if request path matches glob pattern (e.g., ",[600,1320,1321],{},"'\u002Fapi\u002Fcritical\u002F**'",")",[573,1324,1326],{"id":1325},"how-they-work-together","How They Work Together",[521,1328,1329],{},"The two tiers complement each other:",[1331,1332,1333,1339,1349,1355],"ol",{},[536,1334,1335,1338],{},[581,1336,1337],{},"Request completes"," - evlog knows the status, duration, and path",[536,1340,1341,1344,1345,1348],{},[581,1342,1343],{},"Tail sampling evaluates"," - if any ",[600,1346,1347],{},"keep"," condition matches, the log is force-kept",[536,1350,1351,1354],{},[581,1352,1353],{},"Head sampling applies"," - only if tail sampling didn't force-keep, the random percentage check runs",[536,1356,1357,1360],{},[581,1358,1359],{},"Log emits or drops"," - kept logs go through enrichment and draining as normal",[521,1362,1363,1364,1367,1368,1370],{},"This means a request to ",[600,1365,1366],{},"\u002Fapi\u002Fpayments\u002Fcharge"," that returns a 500 in 2 seconds will always be logged, even if ",[600,1369,1079],{}," is set to 1%. The tail conditions rescue it.",[1372,1373],"tail-sample-decision",{},[589,1375,1376,1452],{},[592,1377,1379],{"className":594,"code":1378,"filename":490,"language":597,"meta":598,"style":598},"sampling: {\n  rates: { info: 10 },\n  keep: [\n    { status: 400 },\n    { duration: 1000 },\n  ],\n}\n",[600,1380,1381,1390,1407,1416,1429,1441,1448],{"__ignoreMap":598},[546,1382,1383,1386,1388],{"class":604,"line":605},[546,1384,1385],{"class":1110},"sampling",[546,1387,634],{"class":623},[546,1389,663],{"class":623},[546,1391,1392,1395,1397,1399,1401,1403,1405],{"class":604,"line":627},[546,1393,1394],{"class":1110},"  rates",[546,1396,634],{"class":623},[546,1398,791],{"class":623},[546,1400,1133],{"class":1110},[546,1402,634],{"class":623},[546,1404,695],{"class":694},[546,1406,998],{"class":623},[546,1408,1409,1412,1414],{"class":604,"line":655},[546,1410,1411],{"class":1110},"  keep",[546,1413,634],{"class":623},[546,1415,1149],{"class":630},[546,1417,1418,1421,1423,1425,1427],{"class":604,"line":666},[546,1419,1420],{"class":623},"    {",[546,1422,1157],{"class":630},[546,1424,634],{"class":623},[546,1426,1162],{"class":694},[546,1428,998],{"class":623},[546,1430,1431,1433,1435,1437,1439],{"class":604,"line":676},[546,1432,1420],{"class":623},[546,1434,1175],{"class":630},[546,1436,634],{"class":623},[546,1438,1180],{"class":694},[546,1440,998],{"class":623},[546,1442,1443,1446],{"class":604,"line":686},[546,1444,1445],{"class":630},"  ]",[546,1447,652],{"class":623},[546,1449,1450],{"class":604,"line":705},[546,1451,1222],{"class":623},[592,1453,1458],{"className":1454,"code":1455,"filename":1456,"language":1457,"meta":598,"style":598},"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",[600,1459,1460,1490,1522,1554],{"__ignoreMap":598},[546,1461,1462,1465,1468,1471,1474,1477,1480,1483,1486,1488],{"class":604,"line":605},[546,1463,1464],{"class":1110},"POST",[546,1466,1467],{"class":643}," \u002Fapi\u002Fusers",[546,1469,1470],{"class":694},"     200",[546,1472,1473],{"class":643},"  45ms",[546,1475,1476],{"class":643},"   →",[546,1478,1479],{"class":643}," 10%",[546,1481,1482],{"class":643}," chance",[546,1484,1485],{"class":619}," (head ",[546,1487,1385],{"class":643},[546,1489,777],{"class":619},[546,1491,1492,1494,1496,1499,1501,1503,1506,1509,1512,1515,1518,1520],{"class":604,"line":627},[546,1493,1464],{"class":1110},[546,1495,1467],{"class":643},[546,1497,1498],{"class":694},"     500",[546,1500,1473],{"class":643},[546,1502,1476],{"class":643},[546,1504,1505],{"class":643}," always",[546,1507,1508],{"class":643}," kept",[546,1510,1511],{"class":619}," (status ",[546,1513,1514],{"class":623},">",[546,1516,1517],{"class":643},"=",[546,1519,1162],{"class":694},[546,1521,777],{"class":619},[546,1523,1524,1527,1530,1533,1536,1539,1541,1543,1546,1548,1550,1552],{"class":604,"line":655},[546,1525,1526],{"class":1110},"GET",[546,1528,1529],{"class":643},"  \u002Fapi\u002Fproducts",[546,1531,1532],{"class":694},"  200",[546,1534,1535],{"class":643},"  2300ms",[546,1537,1538],{"class":643}," →",[546,1540,1505],{"class":643},[546,1542,1508],{"class":643},[546,1544,1545],{"class":619}," (duration ",[546,1547,1514],{"class":623},[546,1549,1517],{"class":643},[546,1551,1180],{"class":694},[546,1553,777],{"class":619},[546,1555,1556,1558,1561,1563,1566,1569,1571,1573,1575,1577],{"class":604,"line":666},[546,1557,1464],{"class":1110},[546,1559,1560],{"class":643}," \u002Fapi\u002Fcheckout",[546,1562,1532],{"class":694},[546,1564,1565],{"class":643},"  120ms",[546,1567,1568],{"class":643},"  →",[546,1570,1479],{"class":643},[546,1572,1482],{"class":643},[546,1574,1485],{"class":619},[546,1576,1385],{"class":643},[546,1578,777],{"class":619},[573,1580,1582],{"id":1581},"custom-tail-sampling","Custom Tail Sampling",[521,1584,1585,1586,1589,1590,1592],{},"For conditions beyond status, duration, and path, use the ",[600,1587,1588],{},"evlog:emit:keep"," hook in Nuxt\u002FNitro or the ",[600,1591,1347],{}," callback in other frameworks.",[589,1594,1595,1737,1924],{},[592,1596,1599],{"className":594,"code":1597,"filename":1598,"language":597,"meta":598,"style":598},"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)",[600,1600,1601,1625,1663,1703,1719,1724,1731],{"__ignoreMap":598},[546,1602,1603,1605,1607,1610,1612,1614,1618,1620,1623],{"class":604,"line":605},[546,1604,609],{"class":608},[546,1606,612],{"class":608},[546,1608,1609],{"class":615}," defineNitroPlugin",[546,1611,620],{"class":619},[546,1613,620],{"class":623},[546,1615,1617],{"class":1616},"sHdIc","nitroApp",[546,1619,1322],{"class":623},[546,1621,1622],{"class":822}," =>",[546,1624,663],{"class":623},[546,1626,1627,1630,1633,1636,1638,1641,1643,1645,1647,1649,1651,1654,1657,1659,1661],{"class":604,"line":627},[546,1628,1629],{"class":619},"  nitroApp",[546,1631,1632],{"class":623},".",[546,1634,1635],{"class":619},"hooks",[546,1637,1632],{"class":623},[546,1639,1640],{"class":615},"hook",[546,1642,620],{"class":630},[546,1644,640],{"class":623},[546,1646,1588],{"class":643},[546,1648,640],{"class":623},[546,1650,698],{"class":623},[546,1652,1653],{"class":623}," (",[546,1655,1656],{"class":1616},"ctx",[546,1658,1322],{"class":623},[546,1660,1622],{"class":822},[546,1662,663],{"class":623},[546,1664,1665,1668,1670,1672,1674,1677,1679,1682,1685,1688,1691,1693,1696,1698,1701],{"class":604,"line":655},[546,1666,1667],{"class":608},"    if",[546,1669,1653],{"class":630},[546,1671,1656],{"class":619},[546,1673,1632],{"class":623},[546,1675,1676],{"class":619},"context",[546,1678,1632],{"class":623},[546,1680,1681],{"class":619},"user",[546,1683,1684],{"class":623},"?.",[546,1686,1687],{"class":619},"plan",[546,1689,1690],{"class":623}," ===",[546,1692,803],{"class":623},[546,1694,1695],{"class":643},"enterprise",[546,1697,640],{"class":623},[546,1699,1700],{"class":630},") ",[546,1702,624],{"class":623},[546,1704,1705,1708,1710,1713,1715],{"class":604,"line":666},[546,1706,1707],{"class":619},"      ctx",[546,1709,1632],{"class":623},[546,1711,1712],{"class":619},"shouldKeep",[546,1714,838],{"class":623},[546,1716,1718],{"class":1717},"sfNiH"," true\n",[546,1720,1721],{"class":604,"line":676},[546,1722,1723],{"class":623},"    }\n",[546,1725,1726,1729],{"class":604,"line":686},[546,1727,1728],{"class":623},"  }",[546,1730,777],{"class":630},[546,1732,1733,1735],{"class":604,"line":705},[546,1734,774],{"class":623},[546,1736,777],{"class":619},[592,1738,1740],{"className":594,"code":1739,"filename":781,"language":597,"meta":598,"style":598},"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",[600,1741,1742,1760,1764,1788,1802,1810,1826,1849,1853,1865,1897,1909,1913,1917],{"__ignoreMap":598},[546,1743,1744,1746,1748,1750,1752,1754,1756,1758],{"class":604,"line":605},[546,1745,788],{"class":608},[546,1747,791],{"class":623},[546,1749,794],{"class":619},[546,1751,797],{"class":623},[546,1753,800],{"class":608},[546,1755,803],{"class":623},[546,1757,806],{"class":643},[546,1759,809],{"class":623},[546,1761,1762],{"class":604,"line":627},[546,1763,815],{"emptyLinePlaceholder":814},[546,1765,1766,1768,1770,1772,1774,1776,1778,1780,1782,1784,1786],{"class":604,"line":655},[546,1767,609],{"class":608},[546,1769,823],{"class":822},[546,1771,791],{"class":623},[546,1773,828],{"class":619},[546,1775,698],{"class":623},[546,1777,833],{"class":619},[546,1779,774],{"class":623},[546,1781,838],{"class":623},[546,1783,794],{"class":615},[546,1785,620],{"class":619},[546,1787,624],{"class":623},[546,1789,1790,1792,1794,1796,1798,1800],{"class":604,"line":666},[546,1791,849],{"class":630},[546,1793,634],{"class":623},[546,1795,803],{"class":623},[546,1797,856],{"class":643},[546,1799,640],{"class":623},[546,1801,652],{"class":623},[546,1803,1804,1806,1808],{"class":604,"line":676},[546,1805,865],{"class":630},[546,1807,634],{"class":623},[546,1809,663],{"class":623},[546,1811,1812,1814,1816,1818,1820,1822,1824],{"class":604,"line":686},[546,1813,874],{"class":630},[546,1815,634],{"class":623},[546,1817,791],{"class":623},[546,1819,1133],{"class":630},[546,1821,634],{"class":623},[546,1823,695],{"class":694},[546,1825,998],{"class":623},[546,1827,1828,1830,1832,1834,1837,1839,1841,1843,1845,1847],{"class":604,"line":705},[546,1829,1144],{"class":630},[546,1831,634],{"class":623},[546,1833,637],{"class":619},[546,1835,1836],{"class":623},"{",[546,1838,1157],{"class":630},[546,1840,634],{"class":623},[546,1842,1162],{"class":694},[546,1844,797],{"class":623},[546,1846,649],{"class":619},[546,1848,652],{"class":623},[546,1850,1851],{"class":604,"line":721},[546,1852,768],{"class":623},[546,1854,1855,1857,1859,1861,1863],{"class":604,"line":737},[546,1856,1411],{"class":630},[546,1858,620],{"class":623},[546,1860,1656],{"class":1616},[546,1862,1322],{"class":623},[546,1864,663],{"class":623},[546,1866,1867,1869,1871,1873,1875,1877,1879,1881,1883,1885,1887,1889,1891,1893,1895],{"class":604,"line":753},[546,1868,1667],{"class":608},[546,1870,1653],{"class":630},[546,1872,1656],{"class":619},[546,1874,1632],{"class":623},[546,1876,1676],{"class":619},[546,1878,1632],{"class":623},[546,1880,1681],{"class":619},[546,1882,1684],{"class":623},[546,1884,1687],{"class":619},[546,1886,1690],{"class":623},[546,1888,803],{"class":623},[546,1890,1695],{"class":643},[546,1892,640],{"class":623},[546,1894,1700],{"class":630},[546,1896,624],{"class":623},[546,1898,1899,1901,1903,1905,1907],{"class":604,"line":759},[546,1900,1707],{"class":619},[546,1902,1632],{"class":623},[546,1904,1712],{"class":619},[546,1906,838],{"class":623},[546,1908,1718],{"class":1717},[546,1910,1911],{"class":604,"line":765},[546,1912,1723],{"class":623},[546,1914,1915],{"class":604,"line":771},[546,1916,768],{"class":623},[546,1918,1920,1922],{"class":604,"line":1919},14,[546,1921,774],{"class":623},[546,1923,777],{"class":619},[592,1925,1928],{"className":594,"code":1926,"filename":1927,"language":597,"meta":598,"style":598},"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)",[600,1929,1930,1950,1954,1972,1984,2016,2028,2032,2036],{"__ignoreMap":598},[546,1931,1932,1934,1936,1939,1941,1943,1945,1948],{"class":604,"line":605},[546,1933,788],{"class":608},[546,1935,791],{"class":623},[546,1937,1938],{"class":619}," evlog",[546,1940,797],{"class":623},[546,1942,800],{"class":608},[546,1944,803],{"class":623},[546,1946,1947],{"class":643},"evlog\u002Fhono",[546,1949,809],{"class":623},[546,1951,1952],{"class":604,"line":627},[546,1953,815],{"emptyLinePlaceholder":814},[546,1955,1956,1959,1961,1964,1966,1968,1970],{"class":604,"line":655},[546,1957,1958],{"class":619},"app",[546,1960,1632],{"class":623},[546,1962,1963],{"class":615},"use",[546,1965,620],{"class":619},[546,1967,960],{"class":615},[546,1969,620],{"class":619},[546,1971,624],{"class":623},[546,1973,1974,1976,1978,1980,1982],{"class":604,"line":666},[546,1975,1411],{"class":630},[546,1977,620],{"class":623},[546,1979,1656],{"class":1616},[546,1981,1322],{"class":623},[546,1983,663],{"class":623},[546,1985,1986,1988,1990,1992,1994,1996,1998,2000,2002,2004,2006,2008,2010,2012,2014],{"class":604,"line":676},[546,1987,1667],{"class":608},[546,1989,1653],{"class":630},[546,1991,1656],{"class":619},[546,1993,1632],{"class":623},[546,1995,1676],{"class":619},[546,1997,1632],{"class":623},[546,1999,1681],{"class":619},[546,2001,1684],{"class":623},[546,2003,1687],{"class":619},[546,2005,1690],{"class":623},[546,2007,803],{"class":623},[546,2009,1695],{"class":643},[546,2011,640],{"class":623},[546,2013,1700],{"class":630},[546,2015,624],{"class":623},[546,2017,2018,2020,2022,2024,2026],{"class":604,"line":686},[546,2019,1707],{"class":619},[546,2021,1632],{"class":623},[546,2023,1712],{"class":619},[546,2025,838],{"class":623},[546,2027,1718],{"class":1717},[546,2029,2030],{"class":604,"line":705},[546,2031,1723],{"class":623},[546,2033,2034],{"class":604,"line":721},[546,2035,768],{"class":623},[546,2037,2038,2040],{"class":604,"line":737},[546,2039,774],{"class":623},[546,2041,2042],{"class":619},"))\n",[521,2044,2045,2046,2048],{},"The ",[600,2047,1656],{}," object contains:",[1252,2050,2051,2062],{},[1255,2052,2053],{},[1258,2054,2055,2058,2060],{},[1261,2056,2057],{},"Field",[1261,2059,1266],{},[1261,2061,1269],{},[1271,2063,2064,2078,2091,2105,2119,2136],{},[1258,2065,2066,2070,2075],{},[1276,2067,2068],{},[600,2069,1232],{},[1276,2071,2072],{},[600,2073,2074],{},"number | undefined",[1276,2076,2077],{},"HTTP response status",[1258,2079,2080,2084,2088],{},[1276,2081,2082],{},[600,2083,1236],{},[1276,2085,2086],{},[600,2087,2074],{},[1276,2089,2090],{},"Request duration in ms",[1258,2092,2093,2097,2102],{},[1276,2094,2095],{},[600,2096,1240],{},[1276,2098,2099],{},[600,2100,2101],{},"string | undefined",[1276,2103,2104],{},"Request path",[1258,2106,2107,2112,2116],{},[1276,2108,2109],{},[600,2110,2111],{},"method",[1276,2113,2114],{},[600,2115,2101],{},[1276,2117,2118],{},"HTTP method",[1258,2120,2121,2125,2130],{},[1276,2122,2123],{},[600,2124,1676],{},[1276,2126,2127],{},[600,2128,2129],{},"Record\u003Cstring, unknown>",[1276,2131,2132,2133],{},"All fields set via ",[600,2134,2135],{},"log.set()",[1258,2137,2138,2142,2147],{},[1276,2139,2140],{},[600,2141,1712],{},[1276,2143,2144],{},[600,2145,2146],{},"boolean",[1276,2148,2149,2150,2153],{},"Set to ",[600,2151,2152],{},"true"," to force-keep",[573,2155,2157],{"id":2156},"production-example","Production Example",[521,2159,2160],{},"A typical production configuration that balances cost and visibility:",[589,2162,2163,2418,2623],{},[592,2164,2166],{"className":594,"code":2165,"filename":596,"language":597,"meta":598,"style":598},"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",[600,2167,2168,2180,2198,2206,2227,2231,2240,2249,2258,2267,2278,2289,2300,2311,2316,2326,2340,2353,2370,2388,2396,2401,2406,2411],{"__ignoreMap":598},[546,2169,2170,2172,2174,2176,2178],{"class":604,"line":605},[546,2171,609],{"class":608},[546,2173,612],{"class":608},[546,2175,616],{"class":615},[546,2177,620],{"class":619},[546,2179,624],{"class":623},[546,2181,2182,2184,2186,2188,2190,2192,2194,2196],{"class":604,"line":627},[546,2183,631],{"class":630},[546,2185,634],{"class":623},[546,2187,637],{"class":619},[546,2189,640],{"class":623},[546,2191,644],{"class":643},[546,2193,640],{"class":623},[546,2195,649],{"class":619},[546,2197,652],{"class":623},[546,2199,2200,2202,2204],{"class":604,"line":655},[546,2201,658],{"class":630},[546,2203,634],{"class":623},[546,2205,663],{"class":623},[546,2207,2208,2211,2213,2215,2217,2219,2221,2223,2225],{"class":604,"line":666},[546,2209,2210],{"class":630},"    env",[546,2212,634],{"class":623},[546,2214,791],{"class":623},[546,2216,987],{"class":630},[546,2218,634],{"class":623},[546,2220,803],{"class":623},[546,2222,856],{"class":643},[546,2224,640],{"class":623},[546,2226,998],{"class":623},[546,2228,2229],{"class":604,"line":676},[546,2230,768],{"class":623},[546,2232,2233,2236,2238],{"class":604,"line":686},[546,2234,2235],{"class":630},"  $production",[546,2237,634],{"class":623},[546,2239,663],{"class":623},[546,2241,2242,2245,2247],{"class":604,"line":705},[546,2243,2244],{"class":630},"    evlog",[546,2246,634],{"class":623},[546,2248,663],{"class":623},[546,2250,2251,2254,2256],{"class":604,"line":721},[546,2252,2253],{"class":630},"      sampling",[546,2255,634],{"class":623},[546,2257,663],{"class":623},[546,2259,2260,2263,2265],{"class":604,"line":737},[546,2261,2262],{"class":630},"        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