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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.",[539,540,543,546,572],"prompt",{":actions":541,"description":542,"icon":64},"[\"copy\",\"cursor\",\"claude\"]","Enable head and tail sampling",[535,544,545],{},"Enable head and tail sampling in my evlog production config.",[547,548,549,553,556,563,566,569],"ul",{},[550,551,552],"li",{},"Identify my framework and locate the evlog config (nuxt.config.ts, lib\u002Fevlog.ts, initLogger, etc.)",[550,554,555],{},"Configure sampling.rates per level: { info: 10, warn: 50, debug: 0, error: 100 } as a starting point",[550,557,558,559],{},"Add sampling.keep rules to force-keep critical events: ",[560,561,562],"span",{},"{ status: 400 }, { duration: 1000 }, { path: '\u002Fapi\u002Fcritical\u002F**' }",[550,564,565],{},"For business-specific keep logic (e.g. premium users), add a custom keep callback or evlog:emit:keep hook",[550,567,568],{},"Wrap sampling in a $production override so dev keeps full logging",[550,570,571],{},"Confirm errors are always kept by default unless I explicitly set error: 0",[535,573,574,575,581,582],{},"Docs: ",[576,577,578],"a",{"href":578,"rel":579},"https:\u002F\u002Fwww.evlog.dev\u002Flearn\u002Fsampling",[580],"nofollow","\nBest practices: ",[576,583,584],{"href":584,"rel":585},"https:\u002F\u002Fwww.evlog.dev\u002Freference\u002Fbest-practices",[580],[587,588,590],"h2",{"id":589},"head-sampling","Head Sampling",[535,592,593,594,598],{},"Head sampling randomly keeps a percentage of logs per level. It runs ",[595,596,597],"strong",{},"before"," the request completes, acting as a coin flip at emission time.",[600,601],"head-sampling-plinko",{},[603,604,605,792,951],"code-group",{},[606,607,613],"pre",{"className":608,"code":609,"filename":610,"language":611,"meta":612,"style":612},"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","",[614,615,616,639,667,678,688,698,717,733,749,765,771,777,783],"code",{"__ignoreMap":612},[560,617,620,624,627,631,635],{"class":618,"line":619},"line",1,[560,621,623],{"class":622},"s7zQu","export",[560,625,626],{"class":622}," default",[560,628,630],{"class":629},"s2Zo4"," defineNuxtConfig",[560,632,634],{"class":633},"sTEyZ","(",[560,636,638],{"class":637},"sMK4o","{\n",[560,640,642,646,649,652,655,659,661,664],{"class":618,"line":641},2,[560,643,645],{"class":644},"swJcz","  modules",[560,647,648],{"class":637},":",[560,650,651],{"class":633}," [",[560,653,654],{"class":637},"'",[560,656,658],{"class":657},"sfazB","evlog\u002Fnuxt",[560,660,654],{"class":637},[560,662,663],{"class":633},"]",[560,665,666],{"class":637},",\n",[560,668,670,673,675],{"class":618,"line":669},3,[560,671,672],{"class":644},"  evlog",[560,674,648],{"class":637},[560,676,677],{"class":637}," {\n",[560,679,681,684,686],{"class":618,"line":680},4,[560,682,683],{"class":644},"    sampling",[560,685,648],{"class":637},[560,687,677],{"class":637},[560,689,691,694,696],{"class":618,"line":690},5,[560,692,693],{"class":644},"      rates",[560,695,648],{"class":637},[560,697,677],{"class":637},[560,699,701,704,706,710,713],{"class":618,"line":700},6,[560,702,703],{"class":644},"        info",[560,705,648],{"class":637},[560,707,709],{"class":708},"sbssI"," 10",[560,711,712],{"class":637},",",[560,714,716],{"class":715},"sHwdD","    \u002F\u002F Keep 10% of info logs\n",[560,718,720,723,725,728,730],{"class":618,"line":719},7,[560,721,722],{"class":644},"        warn",[560,724,648],{"class":637},[560,726,727],{"class":708}," 50",[560,729,712],{"class":637},[560,731,732],{"class":715},"    \u002F\u002F Keep 50% of warnings\n",[560,734,736,739,741,744,746],{"class":618,"line":735},8,[560,737,738],{"class":644},"        debug",[560,740,648],{"class":637},[560,742,743],{"class":708}," 0",[560,745,712],{"class":637},[560,747,748],{"class":715},"    \u002F\u002F Drop all debug logs\n",[560,750,752,755,757,760,762],{"class":618,"line":751},9,[560,753,754],{"class":644},"        error",[560,756,648],{"class":637},[560,758,759],{"class":708}," 100",[560,761,712],{"class":637},[560,763,764],{"class":715},"  \u002F\u002F Always keep errors (default)\n",[560,766,768],{"class":618,"line":767},10,[560,769,770],{"class":637},"      },\n",[560,772,774],{"class":618,"line":773},11,[560,775,776],{"class":637},"    },\n",[560,778,780],{"class":618,"line":779},12,[560,781,782],{"class":637},"  },\n",[560,784,786,789],{"class":618,"line":785},13,[560,787,788],{"class":637},"}",[560,790,791],{"class":633},")\n",[606,793,796],{"className":608,"code":794,"filename":795,"language":611,"meta":612,"style":612},"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)",[614,797,798,824,830,859,875,884,893,904,915,926,937,941,945],{"__ignoreMap":612},[560,799,800,803,806,809,812,815,818,821],{"class":618,"line":619},[560,801,802],{"class":622},"import",[560,804,805],{"class":637}," {",[560,807,808],{"class":633}," createEvlog",[560,810,811],{"class":637}," }",[560,813,814],{"class":622}," from",[560,816,817],{"class":637}," '",[560,819,820],{"class":657},"evlog\u002Fnext",[560,822,823],{"class":637},"'\n",[560,825,826],{"class":618,"line":641},[560,827,829],{"emptyLinePlaceholder":828},true,"\n",[560,831,832,834,838,840,843,845,848,850,853,855,857],{"class":618,"line":669},[560,833,623],{"class":622},[560,835,837],{"class":836},"spNyl"," const",[560,839,805],{"class":637},[560,841,842],{"class":633}," withEvlog",[560,844,712],{"class":637},[560,846,847],{"class":633}," useLogger ",[560,849,788],{"class":637},[560,851,852],{"class":637}," =",[560,854,808],{"class":629},[560,856,634],{"class":633},[560,858,638],{"class":637},[560,860,861,864,866,868,871,873],{"class":618,"line":680},[560,862,863],{"class":644},"  service",[560,865,648],{"class":637},[560,867,817],{"class":637},[560,869,870],{"class":657},"my-app",[560,872,654],{"class":637},[560,874,666],{"class":637},[560,876,877,880,882],{"class":618,"line":690},[560,878,879],{"class":644},"  sampling",[560,881,648],{"class":637},[560,883,677],{"class":637},[560,885,886,889,891],{"class":618,"line":700},[560,887,888],{"class":644},"    rates",[560,890,648],{"class":637},[560,892,677],{"class":637},[560,894,895,898,900,902],{"class":618,"line":719},[560,896,897],{"class":644},"      info",[560,899,648],{"class":637},[560,901,709],{"class":708},[560,903,666],{"class":637},[560,905,906,909,911,913],{"class":618,"line":735},[560,907,908],{"class":644},"      warn",[560,910,648],{"class":637},[560,912,727],{"class":708},[560,914,666],{"class":637},[560,916,917,920,922,924],{"class":618,"line":751},[560,918,919],{"class":644},"      debug",[560,921,648],{"class":637},[560,923,743],{"class":708},[560,925,666],{"class":637},[560,927,928,931,933,935],{"class":618,"line":767},[560,929,930],{"class":644},"      error",[560,932,648],{"class":637},[560,934,759],{"class":708},[560,936,666],{"class":637},[560,938,939],{"class":618,"line":773},[560,940,776],{"class":637},[560,942,943],{"class":618,"line":779},[560,944,782],{"class":637},[560,946,947,949],{"class":618,"line":785},[560,948,788],{"class":637},[560,950,791],{"class":633},[606,952,955],{"className":608,"code":953,"filename":954,"language":611,"meta":612,"style":612},"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)",[614,956,957,977,981,990,1013,1021,1029,1039,1049,1059,1069,1073,1077],{"__ignoreMap":612},[560,958,959,961,963,966,968,970,972,975],{"class":618,"line":619},[560,960,802],{"class":622},[560,962,805],{"class":637},[560,964,965],{"class":633}," initLogger",[560,967,811],{"class":637},[560,969,814],{"class":622},[560,971,817],{"class":637},[560,973,974],{"class":657},"evlog",[560,976,823],{"class":637},[560,978,979],{"class":618,"line":641},[560,980,829],{"emptyLinePlaceholder":828},[560,982,983,986,988],{"class":618,"line":669},[560,984,985],{"class":629},"initLogger",[560,987,634],{"class":633},[560,989,638],{"class":637},[560,991,992,995,997,999,1002,1004,1006,1008,1010],{"class":618,"line":680},[560,993,994],{"class":644},"  env",[560,996,648],{"class":637},[560,998,805],{"class":637},[560,1000,1001],{"class":644}," service",[560,1003,648],{"class":637},[560,1005,817],{"class":637},[560,1007,870],{"class":657},[560,1009,654],{"class":637},[560,1011,1012],{"class":637}," },\n",[560,1014,1015,1017,1019],{"class":618,"line":690},[560,1016,879],{"class":644},[560,1018,648],{"class":637},[560,1020,677],{"class":637},[560,1022,1023,1025,1027],{"class":618,"line":700},[560,1024,888],{"class":644},[560,1026,648],{"class":637},[560,1028,677],{"class":637},[560,1030,1031,1033,1035,1037],{"class":618,"line":719},[560,1032,897],{"class":644},[560,1034,648],{"class":637},[560,1036,709],{"class":708},[560,1038,666],{"class":637},[560,1040,1041,1043,1045,1047],{"class":618,"line":735},[560,1042,908],{"class":644},[560,1044,648],{"class":637},[560,1046,727],{"class":708},[560,1048,666],{"class":637},[560,1050,1051,1053,1055,1057],{"class":618,"line":751},[560,1052,919],{"class":644},[560,1054,648],{"class":637},[560,1056,743],{"class":708},[560,1058,666],{"class":637},[560,1060,1061,1063,1065,1067],{"class":618,"line":767},[560,1062,930],{"class":644},[560,1064,648],{"class":637},[560,1066,759],{"class":708},[560,1068,666],{"class":637},[560,1070,1071],{"class":618,"line":773},[560,1072,776],{"class":637},[560,1074,1075],{"class":618,"line":779},[560,1076,782],{"class":637},[560,1078,1079,1081],{"class":618,"line":785},[560,1080,788],{"class":637},[560,1082,791],{"class":633},[535,1084,1085,1086,1089],{},"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 ",[614,1087,1088],{},"error: 0"," to drop errors.",[1091,1092,1094,1095,1098],"callout",{"color":1093,"icon":13},"info","Head sampling is random. A ",[614,1096,1097],{},"10%"," rate means roughly 1 in 10 info logs are kept, not exactly 1 in 10.",[587,1100,1102],{"id":1101},"tail-sampling","Tail Sampling",[535,1104,1105,1106,1109],{},"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 ",[595,1107,1108],{},"after"," the request completes and force-keeping logs that match specific conditions.",[606,1111,1113],{"className":608,"code":1112,"filename":610,"language":611,"meta":612,"style":612},"\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",[614,1114,1115,1120,1129,1137,1154,1164,1183,1200,1221,1228,1232],{"__ignoreMap":612},[560,1116,1117],{"class":618,"line":619},[560,1118,1119],{"class":715},"\u002F\u002F Sampling config, works the same across all frameworks\n",[560,1121,1122,1125,1127],{"class":618,"line":641},[560,1123,974],{"class":1124},"sBMFI",[560,1126,648],{"class":637},[560,1128,677],{"class":637},[560,1130,1131,1133,1135],{"class":618,"line":669},[560,1132,879],{"class":1124},[560,1134,648],{"class":637},[560,1136,677],{"class":637},[560,1138,1139,1141,1143,1145,1148,1150,1152],{"class":618,"line":680},[560,1140,888],{"class":1124},[560,1142,648],{"class":637},[560,1144,805],{"class":637},[560,1146,1147],{"class":1124}," info",[560,1149,648],{"class":637},[560,1151,709],{"class":708},[560,1153,1012],{"class":637},[560,1155,1156,1159,1161],{"class":618,"line":690},[560,1157,1158],{"class":1124},"    keep",[560,1160,648],{"class":637},[560,1162,1163],{"class":644}," [\n",[560,1165,1166,1169,1172,1174,1177,1180],{"class":618,"line":700},[560,1167,1168],{"class":637},"      {",[560,1170,1171],{"class":644}," status",[560,1173,648],{"class":637},[560,1175,1176],{"class":708}," 400",[560,1178,1179],{"class":637}," },",[560,1181,1182],{"class":715},"              \u002F\u002F HTTP status >= 400\n",[560,1184,1185,1187,1190,1192,1195,1197],{"class":618,"line":719},[560,1186,1168],{"class":637},[560,1188,1189],{"class":644}," duration",[560,1191,648],{"class":637},[560,1193,1194],{"class":708}," 1000",[560,1196,1179],{"class":637},[560,1198,1199],{"class":715},"           \u002F\u002F Request took >= 1s\n",[560,1201,1202,1204,1207,1209,1211,1214,1216,1218],{"class":618,"line":735},[560,1203,1168],{"class":637},[560,1205,1206],{"class":644}," path",[560,1208,648],{"class":637},[560,1210,817],{"class":637},[560,1212,1213],{"class":657},"\u002Fapi\u002Fpayments\u002F**",[560,1215,654],{"class":637},[560,1217,1179],{"class":637},[560,1219,1220],{"class":715}," \u002F\u002F Critical path (glob)\n",[560,1222,1223,1226],{"class":618,"line":751},[560,1224,1225],{"class":644},"    ]",[560,1227,666],{"class":637},[560,1229,1230],{"class":618,"line":767},[560,1231,782],{"class":637},[560,1233,1234],{"class":618,"line":773},[560,1235,1236],{"class":637},"}\n",[535,1238,1239,1240,1243,1244,1247,1248,1251,1252,1255,1256,1259],{},"Conditions use ",[595,1241,1242],{},">="," comparison for ",[614,1245,1246],{},"status"," and ",[614,1249,1250],{},"duration",", and glob matching for ",[614,1253,1254],{},"path",". If ",[595,1257,1258],{},"any"," condition matches, the log is kept regardless of head sampling (OR logic).",[1261,1262,1264],"h3",{"id":1263},"available-conditions","Available Conditions",[1266,1267,1268,1284],"table",{},[1269,1270,1271],"thead",{},[1272,1273,1274,1278,1281],"tr",{},[1275,1276,1277],"th",{},"Condition",[1275,1279,1280],{},"Type",[1275,1282,1283],{},"Description",[1285,1286,1287,1306,1319],"tbody",{},[1272,1288,1289,1294,1299],{},[1290,1291,1292],"td",{},[614,1293,1246],{},[1290,1295,1296],{},[614,1297,1298],{},"number",[1290,1300,1301,1302,1305],{},"Keep if HTTP status >= value (e.g., ",[614,1303,1304],{},"400"," catches all 4xx and 5xx)",[1272,1307,1308,1312,1316],{},[1290,1309,1310],{},[614,1311,1250],{},[1290,1313,1314],{},[614,1315,1298],{},[1290,1317,1318],{},"Keep if request duration >= value in milliseconds",[1272,1320,1321,1325,1330],{},[1290,1322,1323],{},[614,1324,1254],{},[1290,1326,1327],{},[614,1328,1329],{},"string",[1290,1331,1332,1333,1336],{},"Keep if request path matches glob pattern (e.g., ",[614,1334,1335],{},"'\u002Fapi\u002Fcritical\u002F**'",")",[587,1338,1340],{"id":1339},"how-they-work-together","How They Work Together",[535,1342,1343],{},"The two tiers complement each other:",[1345,1346,1347,1353,1363,1369],"ol",{},[550,1348,1349,1352],{},[595,1350,1351],{},"Request completes"," - evlog knows the status, duration, and path",[550,1354,1355,1358,1359,1362],{},[595,1356,1357],{},"Tail sampling evaluates"," - if any ",[614,1360,1361],{},"keep"," condition matches, the log is force-kept",[550,1364,1365,1368],{},[595,1366,1367],{},"Head sampling applies"," - only if tail sampling didn't force-keep, the random percentage check runs",[550,1370,1371,1374],{},[595,1372,1373],{},"Log emits or drops"," - kept logs go through enrichment and draining as normal",[535,1376,1377,1378,1381,1382,1384],{},"This means a request to ",[614,1379,1380],{},"\u002Fapi\u002Fpayments\u002Fcharge"," that returns a 500 in 2 seconds will always be logged, even if ",[614,1383,1093],{}," is set to 1%. The tail conditions rescue it.",[1386,1387],"tail-sample-decision",{},[603,1389,1390,1466],{},[606,1391,1393],{"className":608,"code":1392,"filename":504,"language":611,"meta":612,"style":612},"sampling: {\n  rates: { info: 10 },\n  keep: [\n    { status: 400 },\n    { duration: 1000 },\n  ],\n}\n",[614,1394,1395,1404,1421,1430,1443,1455,1462],{"__ignoreMap":612},[560,1396,1397,1400,1402],{"class":618,"line":619},[560,1398,1399],{"class":1124},"sampling",[560,1401,648],{"class":637},[560,1403,677],{"class":637},[560,1405,1406,1409,1411,1413,1415,1417,1419],{"class":618,"line":641},[560,1407,1408],{"class":1124},"  rates",[560,1410,648],{"class":637},[560,1412,805],{"class":637},[560,1414,1147],{"class":1124},[560,1416,648],{"class":637},[560,1418,709],{"class":708},[560,1420,1012],{"class":637},[560,1422,1423,1426,1428],{"class":618,"line":669},[560,1424,1425],{"class":1124},"  keep",[560,1427,648],{"class":637},[560,1429,1163],{"class":644},[560,1431,1432,1435,1437,1439,1441],{"class":618,"line":680},[560,1433,1434],{"class":637},"    {",[560,1436,1171],{"class":644},[560,1438,648],{"class":637},[560,1440,1176],{"class":708},[560,1442,1012],{"class":637},[560,1444,1445,1447,1449,1451,1453],{"class":618,"line":690},[560,1446,1434],{"class":637},[560,1448,1189],{"class":644},[560,1450,648],{"class":637},[560,1452,1194],{"class":708},[560,1454,1012],{"class":637},[560,1456,1457,1460],{"class":618,"line":700},[560,1458,1459],{"class":644},"  ]",[560,1461,666],{"class":637},[560,1463,1464],{"class":618,"line":719},[560,1465,1236],{"class":637},[606,1467,1472],{"className":1468,"code":1469,"filename":1470,"language":1471,"meta":612,"style":612},"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",[614,1473,1474,1504,1536,1568],{"__ignoreMap":612},[560,1475,1476,1479,1482,1485,1488,1491,1494,1497,1500,1502],{"class":618,"line":619},[560,1477,1478],{"class":1124},"POST",[560,1480,1481],{"class":657}," \u002Fapi\u002Fusers",[560,1483,1484],{"class":708},"     200",[560,1486,1487],{"class":657},"  45ms",[560,1489,1490],{"class":657},"   →",[560,1492,1493],{"class":657}," 10%",[560,1495,1496],{"class":657}," chance",[560,1498,1499],{"class":633}," (head ",[560,1501,1399],{"class":657},[560,1503,791],{"class":633},[560,1505,1506,1508,1510,1513,1515,1517,1520,1523,1526,1529,1532,1534],{"class":618,"line":641},[560,1507,1478],{"class":1124},[560,1509,1481],{"class":657},[560,1511,1512],{"class":708},"     500",[560,1514,1487],{"class":657},[560,1516,1490],{"class":657},[560,1518,1519],{"class":657}," always",[560,1521,1522],{"class":657}," kept",[560,1524,1525],{"class":633}," (status ",[560,1527,1528],{"class":637},">",[560,1530,1531],{"class":657},"=",[560,1533,1176],{"class":708},[560,1535,791],{"class":633},[560,1537,1538,1541,1544,1547,1550,1553,1555,1557,1560,1562,1564,1566],{"class":618,"line":669},[560,1539,1540],{"class":1124},"GET",[560,1542,1543],{"class":657},"  \u002Fapi\u002Fproducts",[560,1545,1546],{"class":708},"  200",[560,1548,1549],{"class":657},"  2300ms",[560,1551,1552],{"class":657}," →",[560,1554,1519],{"class":657},[560,1556,1522],{"class":657},[560,1558,1559],{"class":633}," (duration ",[560,1561,1528],{"class":637},[560,1563,1531],{"class":657},[560,1565,1194],{"class":708},[560,1567,791],{"class":633},[560,1569,1570,1572,1575,1577,1580,1583,1585,1587,1589,1591],{"class":618,"line":680},[560,1571,1478],{"class":1124},[560,1573,1574],{"class":657}," \u002Fapi\u002Fcheckout",[560,1576,1546],{"class":708},[560,1578,1579],{"class":657},"  120ms",[560,1581,1582],{"class":657},"  →",[560,1584,1493],{"class":657},[560,1586,1496],{"class":657},[560,1588,1499],{"class":633},[560,1590,1399],{"class":657},[560,1592,791],{"class":633},[587,1594,1596],{"id":1595},"custom-tail-sampling","Custom Tail Sampling",[535,1598,1599,1600,1603,1604,1606],{},"For conditions beyond status, duration, and path, use the ",[614,1601,1602],{},"evlog:emit:keep"," hook in Nuxt\u002FNitro or the ",[614,1605,1361],{}," callback in other frameworks.",[603,1608,1609,1751,1938],{},[606,1610,1613],{"className":608,"code":1611,"filename":1612,"language":611,"meta":612,"style":612},"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)",[614,1614,1615,1639,1677,1717,1733,1738,1745],{"__ignoreMap":612},[560,1616,1617,1619,1621,1624,1626,1628,1632,1634,1637],{"class":618,"line":619},[560,1618,623],{"class":622},[560,1620,626],{"class":622},[560,1622,1623],{"class":629}," defineNitroPlugin",[560,1625,634],{"class":633},[560,1627,634],{"class":637},[560,1629,1631],{"class":1630},"sHdIc","nitroApp",[560,1633,1336],{"class":637},[560,1635,1636],{"class":836}," =>",[560,1638,677],{"class":637},[560,1640,1641,1644,1647,1650,1652,1655,1657,1659,1661,1663,1665,1668,1671,1673,1675],{"class":618,"line":641},[560,1642,1643],{"class":633},"  nitroApp",[560,1645,1646],{"class":637},".",[560,1648,1649],{"class":633},"hooks",[560,1651,1646],{"class":637},[560,1653,1654],{"class":629},"hook",[560,1656,634],{"class":644},[560,1658,654],{"class":637},[560,1660,1602],{"class":657},[560,1662,654],{"class":637},[560,1664,712],{"class":637},[560,1666,1667],{"class":637}," (",[560,1669,1670],{"class":1630},"ctx",[560,1672,1336],{"class":637},[560,1674,1636],{"class":836},[560,1676,677],{"class":637},[560,1678,1679,1682,1684,1686,1688,1691,1693,1696,1699,1702,1705,1707,1710,1712,1715],{"class":618,"line":669},[560,1680,1681],{"class":622},"    if",[560,1683,1667],{"class":644},[560,1685,1670],{"class":633},[560,1687,1646],{"class":637},[560,1689,1690],{"class":633},"context",[560,1692,1646],{"class":637},[560,1694,1695],{"class":633},"user",[560,1697,1698],{"class":637},"?.",[560,1700,1701],{"class":633},"plan",[560,1703,1704],{"class":637}," ===",[560,1706,817],{"class":637},[560,1708,1709],{"class":657},"enterprise",[560,1711,654],{"class":637},[560,1713,1714],{"class":644},") ",[560,1716,638],{"class":637},[560,1718,1719,1722,1724,1727,1729],{"class":618,"line":680},[560,1720,1721],{"class":633},"      ctx",[560,1723,1646],{"class":637},[560,1725,1726],{"class":633},"shouldKeep",[560,1728,852],{"class":637},[560,1730,1732],{"class":1731},"sfNiH"," true\n",[560,1734,1735],{"class":618,"line":690},[560,1736,1737],{"class":637},"    }\n",[560,1739,1740,1743],{"class":618,"line":700},[560,1741,1742],{"class":637},"  }",[560,1744,791],{"class":644},[560,1746,1747,1749],{"class":618,"line":719},[560,1748,788],{"class":637},[560,1750,791],{"class":633},[606,1752,1754],{"className":608,"code":1753,"filename":795,"language":611,"meta":612,"style":612},"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",[614,1755,1756,1774,1778,1802,1816,1824,1840,1863,1867,1879,1911,1923,1927,1931],{"__ignoreMap":612},[560,1757,1758,1760,1762,1764,1766,1768,1770,1772],{"class":618,"line":619},[560,1759,802],{"class":622},[560,1761,805],{"class":637},[560,1763,808],{"class":633},[560,1765,811],{"class":637},[560,1767,814],{"class":622},[560,1769,817],{"class":637},[560,1771,820],{"class":657},[560,1773,823],{"class":637},[560,1775,1776],{"class":618,"line":641},[560,1777,829],{"emptyLinePlaceholder":828},[560,1779,1780,1782,1784,1786,1788,1790,1792,1794,1796,1798,1800],{"class":618,"line":669},[560,1781,623],{"class":622},[560,1783,837],{"class":836},[560,1785,805],{"class":637},[560,1787,842],{"class":633},[560,1789,712],{"class":637},[560,1791,847],{"class":633},[560,1793,788],{"class":637},[560,1795,852],{"class":637},[560,1797,808],{"class":629},[560,1799,634],{"class":633},[560,1801,638],{"class":637},[560,1803,1804,1806,1808,1810,1812,1814],{"class":618,"line":680},[560,1805,863],{"class":644},[560,1807,648],{"class":637},[560,1809,817],{"class":637},[560,1811,870],{"class":657},[560,1813,654],{"class":637},[560,1815,666],{"class":637},[560,1817,1818,1820,1822],{"class":618,"line":690},[560,1819,879],{"class":644},[560,1821,648],{"class":637},[560,1823,677],{"class":637},[560,1825,1826,1828,1830,1832,1834,1836,1838],{"class":618,"line":700},[560,1827,888],{"class":644},[560,1829,648],{"class":637},[560,1831,805],{"class":637},[560,1833,1147],{"class":644},[560,1835,648],{"class":637},[560,1837,709],{"class":708},[560,1839,1012],{"class":637},[560,1841,1842,1844,1846,1848,1851,1853,1855,1857,1859,1861],{"class":618,"line":719},[560,1843,1158],{"class":644},[560,1845,648],{"class":637},[560,1847,651],{"class":633},[560,1849,1850],{"class":637},"{",[560,1852,1171],{"class":644},[560,1854,648],{"class":637},[560,1856,1176],{"class":708},[560,1858,811],{"class":637},[560,1860,663],{"class":633},[560,1862,666],{"class":637},[560,1864,1865],{"class":618,"line":735},[560,1866,782],{"class":637},[560,1868,1869,1871,1873,1875,1877],{"class":618,"line":751},[560,1870,1425],{"class":644},[560,1872,634],{"class":637},[560,1874,1670],{"class":1630},[560,1876,1336],{"class":637},[560,1878,677],{"class":637},[560,1880,1881,1883,1885,1887,1889,1891,1893,1895,1897,1899,1901,1903,1905,1907,1909],{"class":618,"line":767},[560,1882,1681],{"class":622},[560,1884,1667],{"class":644},[560,1886,1670],{"class":633},[560,1888,1646],{"class":637},[560,1890,1690],{"class":633},[560,1892,1646],{"class":637},[560,1894,1695],{"class":633},[560,1896,1698],{"class":637},[560,1898,1701],{"class":633},[560,1900,1704],{"class":637},[560,1902,817],{"class":637},[560,1904,1709],{"class":657},[560,1906,654],{"class":637},[560,1908,1714],{"class":644},[560,1910,638],{"class":637},[560,1912,1913,1915,1917,1919,1921],{"class":618,"line":773},[560,1914,1721],{"class":633},[560,1916,1646],{"class":637},[560,1918,1726],{"class":633},[560,1920,852],{"class":637},[560,1922,1732],{"class":1731},[560,1924,1925],{"class":618,"line":779},[560,1926,1737],{"class":637},[560,1928,1929],{"class":618,"line":785},[560,1930,782],{"class":637},[560,1932,1934,1936],{"class":618,"line":1933},14,[560,1935,788],{"class":637},[560,1937,791],{"class":633},[606,1939,1942],{"className":608,"code":1940,"filename":1941,"language":611,"meta":612,"style":612},"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)",[614,1943,1944,1964,1968,1986,1998,2030,2042,2046,2050],{"__ignoreMap":612},[560,1945,1946,1948,1950,1953,1955,1957,1959,1962],{"class":618,"line":619},[560,1947,802],{"class":622},[560,1949,805],{"class":637},[560,1951,1952],{"class":633}," evlog",[560,1954,811],{"class":637},[560,1956,814],{"class":622},[560,1958,817],{"class":637},[560,1960,1961],{"class":657},"evlog\u002Fhono",[560,1963,823],{"class":637},[560,1965,1966],{"class":618,"line":641},[560,1967,829],{"emptyLinePlaceholder":828},[560,1969,1970,1973,1975,1978,1980,1982,1984],{"class":618,"line":669},[560,1971,1972],{"class":633},"app",[560,1974,1646],{"class":637},[560,1976,1977],{"class":629},"use",[560,1979,634],{"class":633},[560,1981,974],{"class":629},[560,1983,634],{"class":633},[560,1985,638],{"class":637},[560,1987,1988,1990,1992,1994,1996],{"class":618,"line":680},[560,1989,1425],{"class":644},[560,1991,634],{"class":637},[560,1993,1670],{"class":1630},[560,1995,1336],{"class":637},[560,1997,677],{"class":637},[560,1999,2000,2002,2004,2006,2008,2010,2012,2014,2016,2018,2020,2022,2024,2026,2028],{"class":618,"line":690},[560,2001,1681],{"class":622},[560,2003,1667],{"class":644},[560,2005,1670],{"class":633},[560,2007,1646],{"class":637},[560,2009,1690],{"class":633},[560,2011,1646],{"class":637},[560,2013,1695],{"class":633},[560,2015,1698],{"class":637},[560,2017,1701],{"class":633},[560,2019,1704],{"class":637},[560,2021,817],{"class":637},[560,2023,1709],{"class":657},[560,2025,654],{"class":637},[560,2027,1714],{"class":644},[560,2029,638],{"class":637},[560,2031,2032,2034,2036,2038,2040],{"class":618,"line":700},[560,2033,1721],{"class":633},[560,2035,1646],{"class":637},[560,2037,1726],{"class":633},[560,2039,852],{"class":637},[560,2041,1732],{"class":1731},[560,2043,2044],{"class":618,"line":719},[560,2045,1737],{"class":637},[560,2047,2048],{"class":618,"line":735},[560,2049,782],{"class":637},[560,2051,2052,2054],{"class":618,"line":751},[560,2053,788],{"class":637},[560,2055,2056],{"class":633},"))\n",[535,2058,2059,2060,2062],{},"The ",[614,2061,1670],{}," object contains:",[1266,2064,2065,2076],{},[1269,2066,2067],{},[1272,2068,2069,2072,2074],{},[1275,2070,2071],{},"Field",[1275,2073,1280],{},[1275,2075,1283],{},[1285,2077,2078,2092,2105,2119,2133,2150],{},[1272,2079,2080,2084,2089],{},[1290,2081,2082],{},[614,2083,1246],{},[1290,2085,2086],{},[614,2087,2088],{},"number | undefined",[1290,2090,2091],{},"HTTP response status",[1272,2093,2094,2098,2102],{},[1290,2095,2096],{},[614,2097,1250],{},[1290,2099,2100],{},[614,2101,2088],{},[1290,2103,2104],{},"Request duration in ms",[1272,2106,2107,2111,2116],{},[1290,2108,2109],{},[614,2110,1254],{},[1290,2112,2113],{},[614,2114,2115],{},"string | undefined",[1290,2117,2118],{},"Request path",[1272,2120,2121,2126,2130],{},[1290,2122,2123],{},[614,2124,2125],{},"method",[1290,2127,2128],{},[614,2129,2115],{},[1290,2131,2132],{},"HTTP method",[1272,2134,2135,2139,2144],{},[1290,2136,2137],{},[614,2138,1690],{},[1290,2140,2141],{},[614,2142,2143],{},"Record\u003Cstring, unknown>",[1290,2145,2146,2147],{},"All fields set via ",[614,2148,2149],{},"log.set()",[1272,2151,2152,2156,2161],{},[1290,2153,2154],{},[614,2155,1726],{},[1290,2157,2158],{},[614,2159,2160],{},"boolean",[1290,2162,2163,2164,2167],{},"Set to ",[614,2165,2166],{},"true"," to force-keep",[587,2169,2171],{"id":2170},"production-example","Production Example",[535,2173,2174],{},"A typical production configuration that balances cost and visibility:",[603,2176,2177,2432,2637],{},[606,2178,2180],{"className":608,"code":2179,"filename":610,"language":611,"meta":612,"style":612},"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",[614,2181,2182,2194,2212,2220,2241,2245,2254,2263,2272,2281,2292,2303,2314,2325,2330,2340,2354,2367,2384,2402,2410,2415,2420,2425],{"__ignoreMap":612},[560,2183,2184,2186,2188,2190,2192],{"class":618,"line":619},[560,2185,623],{"class":622},[560,2187,626],{"class":622},[560,2189,630],{"class":629},[560,2191,634],{"class":633},[560,2193,638],{"class":637},[560,2195,2196,2198,2200,2202,2204,2206,2208,2210],{"class":618,"line":641},[560,2197,645],{"class":644},[560,2199,648],{"class":637},[560,2201,651],{"class":633},[560,2203,654],{"class":637},[560,2205,658],{"class":657},[560,2207,654],{"class":637},[560,2209,663],{"class":633},[560,2211,666],{"class":637},[560,2213,2214,2216,2218],{"class":618,"line":669},[560,2215,672],{"class":644},[560,2217,648],{"class":637},[560,2219,677],{"class":637},[560,2221,2222,2225,2227,2229,2231,2233,2235,2237,2239],{"class":618,"line":680},[560,2223,2224],{"class":644},"    env",[560,2226,648],{"class":637},[560,2228,805],{"class":637},[560,2230,1001],{"class":644},[560,2232,648],{"class":637},[560,2234,817],{"class":637},[560,2236,870],{"class":657},[560,2238,654],{"class":637},[560,2240,1012],{"class":637},[560,2242,2243],{"class":618,"line":690},[560,2244,782],{"class":637},[560,2246,2247,2250,2252],{"class":618,"line":700},[560,2248,2249],{"class":644},"  $production",[560,2251,648],{"class":637},[560,2253,677],{"class":637},[560,2255,2256,2259,2261],{"class":618,"line":719},[560,2257,2258],{"class":644},"    evlog",[560,2260,648],{"class":637},[560,2262,677],{"class":637},[560,2264,2265,2268,2270],{"class":618,"line":735},[560,2266,2267],{"class":644},"      sampling",[560,2269,648],{"class":637},[560,2271,677],{"class":637},[560,2273,2274,2277,2279],{"class":618,"line":751},[560,2275,2276],{"class":644},"        rates",[560,2278,648],{"class":637},[560,2280,677],{"class":637},[560,2282,2283,2286,2288,2290],{"class":618,"line":767},[560,2284,2285],{"class":644},"          info",[560,2287,648],{"class":637},[560,2289,709],{"class":708},[560,2291,666],{"class":637},[560,2293,2294,2297,2299,2301],{"class":618,"line":773},[560,2295,2296],{"class":644},"          warn",[560,2298,648],{"class":637},[560,2300,727],{"class":708},[560,2302,666],{"class":637},[560,2304,2305,2308,2310,2312],{"class":618,"line":779},[560,2306,2307],{"class":644},"          debug",[560,2309,648],{"class":637},[560,2311,743],{"class":708},[560,2313,666],{"class":637},[560,2315,2316,2319,2321,2323],{"class":618,"line":785},[560,2317,2318],{"class":644},"          error",[560,2320,648],{"class":637},[560,2322,759],{"class":708},[560,2324,666],{"class":637},[560,2326,2327],{"class":618,"line":1933},[560,2328,2329],{"class":637},"        },\n",[560,2331,2333,2336,2338],{"class":618,"line":2332},15,[560,2334,2335],{"class":644},"        keep",[560,2337,648],{"class":637},[560,2339,1163],{"class":633},[560,2341,2343,2346,2348,2350,2352],{"class":618,"line":2342},16,[560,2344,2345],{"class":637},"          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