[{"data":1,"prerenderedAt":3478},["ShallowReactive",2],{"navigation_docs":3,"-frameworks-express":402,"-frameworks-express-surround":3473},[4,35,159,201,289,299,386],{"title":5,"path":6,"stem":7,"children":8,"page":34},"Getting Started","\u002Fgetting-started","1.getting-started",[9,14,19,24,29],{"title":10,"path":11,"stem":12,"icon":13},"Introduction","\u002Fgetting-started\u002Fintroduction","1.getting-started\u002F1.introduction","i-lucide-info",{"title":15,"path":16,"stem":17,"icon":18},"Installation","\u002Fgetting-started\u002Finstallation","1.getting-started\u002F2.installation","i-lucide-download",{"title":20,"path":21,"stem":22,"icon":23},"Quick Start","\u002Fgetting-started\u002Fquick-start","1.getting-started\u002F3.quick-start","i-lucide-zap",{"title":25,"path":26,"stem":27,"icon":28},"Agent Skills","\u002Fgetting-started\u002Fagent-skills","1.getting-started\u002F4.agent-skills","i-lucide-sparkles",{"title":30,"path":31,"stem":32,"icon":33},"vs Other Loggers","\u002Fgetting-started\u002Fvs-other-loggers","1.getting-started\u002F5.vs-other-loggers","i-lucide-scale",false,{"title":36,"path":37,"stem":38,"children":39,"page":34},"Logging","\u002Flogging","2.logging",[40,45,50,55,60,65,70,99,127],{"title":41,"path":42,"stem":43,"icon":44},"Overview","\u002Flogging\u002Foverview","2.logging\u002F0.overview","i-lucide-list",{"title":46,"path":47,"stem":48,"icon":49},"Simple Logging","\u002Flogging\u002Fsimple-logging","2.logging\u002F1.simple-logging","i-lucide-terminal",{"title":51,"path":52,"stem":53,"icon":54},"Wide Events","\u002Flogging\u002Fwide-events","2.logging\u002F2.wide-events","i-lucide-layers",{"title":56,"path":57,"stem":58,"icon":59},"Structured Errors","\u002Flogging\u002Fstructured-errors","2.logging\u002F3.structured-errors","i-lucide-shield-alert",{"title":61,"path":62,"stem":63,"icon":64},"Catalogs","\u002Flogging\u002Fcatalogs","2.logging\u002F4.catalogs","i-lucide-book-open",{"title":66,"path":67,"stem":68,"icon":69},"Client Logging","\u002Flogging\u002Fclient-logging","2.logging\u002F5.client-logging","i-lucide-monitor",{"title":71,"icon":72,"path":73,"stem":74,"children":75,"page":34},"AI SDK","i-simple-icons-vercel","\u002Flogging\u002Fai-sdk","2.logging\u002F6.ai-sdk",[76,79,84,89,94],{"title":41,"path":77,"stem":78,"icon":44},"\u002Flogging\u002Fai-sdk\u002Foverview","2.logging\u002F6.ai-sdk\u002F01.overview",{"title":80,"path":81,"stem":82,"icon":83},"Usage","\u002Flogging\u002Fai-sdk\u002Fusage","2.logging\u002F6.ai-sdk\u002F02.usage","i-lucide-code",{"title":85,"path":86,"stem":87,"icon":88},"Options","\u002Flogging\u002Fai-sdk\u002Foptions","2.logging\u002F6.ai-sdk\u002F03.options","i-lucide-sliders",{"title":90,"path":91,"stem":92,"icon":93},"Metadata","\u002Flogging\u002Fai-sdk\u002Fmetadata","2.logging\u002F6.ai-sdk\u002F04.metadata","i-lucide-database",{"title":95,"path":96,"stem":97,"icon":98},"Telemetry","\u002Flogging\u002Fai-sdk\u002Ftelemetry","2.logging\u002F6.ai-sdk\u002F05.telemetry","i-lucide-activity",{"title":100,"icon":101,"path":102,"stem":103,"children":104,"page":34},"Better Auth","i-simple-icons-betterauth","\u002Flogging\u002Fbetter-auth","2.logging\u002F7.better-auth",[105,108,113,118,122],{"title":41,"path":106,"stem":107,"icon":44},"\u002Flogging\u002Fbetter-auth\u002Foverview","2.logging\u002F7.better-auth\u002F01.overview",{"title":109,"path":110,"stem":111,"icon":112},"Identify User","\u002Flogging\u002Fbetter-auth\u002Fidentify-user","2.logging\u002F7.better-auth\u002F02.identify-user","i-lucide-user-check",{"title":114,"path":115,"stem":116,"icon":117},"Middleware","\u002Flogging\u002Fbetter-auth\u002Fmiddleware","2.logging\u002F7.better-auth\u002F03.middleware","i-lucide-shield",{"title":119,"path":120,"stem":121,"icon":69},"Client Sync","\u002Flogging\u002Fbetter-auth\u002Fclient-sync","2.logging\u002F7.better-auth\u002F04.client-sync",{"title":123,"path":124,"stem":125,"icon":126},"Performance","\u002Flogging\u002Fbetter-auth\u002Fperformance","2.logging\u002F7.better-auth\u002F05.performance","i-lucide-gauge",{"title":128,"icon":129,"path":130,"stem":131,"children":132,"page":34},"Audit Logs","i-lucide-shield-check","\u002Flogging\u002Faudit","2.logging\u002F8.audit",[133,136,141,146,151,155],{"title":41,"path":134,"stem":135,"icon":44},"\u002Flogging\u002Faudit\u002Foverview","2.logging\u002F8.audit\u002F01.overview",{"title":137,"path":138,"stem":139,"icon":140},"Schema","\u002Flogging\u002Faudit\u002Fschema","2.logging\u002F8.audit\u002F02.schema","i-lucide-file-text",{"title":142,"path":143,"stem":144,"icon":145},"Recording","\u002Flogging\u002Faudit\u002Frecording","2.logging\u002F8.audit\u002F03.recording","i-lucide-pen-line",{"title":147,"path":148,"stem":149,"icon":150},"Drains","\u002Flogging\u002Faudit\u002Fpipeline","2.logging\u002F8.audit\u002F04.pipeline","i-lucide-link",{"title":152,"path":153,"stem":154,"icon":129},"Compliance","\u002Flogging\u002Faudit\u002Fcompliance","2.logging\u002F8.audit\u002F05.compliance",{"title":156,"path":157,"stem":158,"icon":64},"Recipes","\u002Flogging\u002Faudit\u002Frecipes","2.logging\u002F8.audit\u002F06.recipes",{"title":160,"path":161,"stem":162,"children":163,"page":34},"Core Concepts","\u002Fcore-concepts","3.core-concepts",[164,169,174,179,184,188,191,196],{"title":165,"path":166,"stem":167,"icon":168},"Lifecycle","\u002Fcore-concepts\u002Flifecycle","3.core-concepts\u002F0.lifecycle","i-lucide-arrow-right-left",{"title":170,"path":171,"stem":172,"icon":173},"Configuration","\u002Fcore-concepts\u002Fconfiguration","3.core-concepts\u002F1.configuration","i-lucide-settings",{"title":175,"path":176,"stem":177,"icon":178},"Sampling","\u002Fcore-concepts\u002Fsampling","3.core-concepts\u002F2.sampling","i-lucide-filter",{"title":180,"path":181,"stem":182,"icon":183},"Typed Fields","\u002Fcore-concepts\u002Ftyped-fields","3.core-concepts\u002F3.typed-fields","i-simple-icons-typescript",{"title":185,"path":186,"stem":187,"icon":129},"Best Practices","\u002Fcore-concepts\u002Fbest-practices","3.core-concepts\u002F4.best-practices",{"title":123,"path":189,"stem":190,"icon":126},"\u002Fcore-concepts\u002Fperformance","3.core-concepts\u002F5.performance",{"title":192,"path":193,"stem":194,"icon":195},"Vite Plugin","\u002Fcore-concepts\u002Fvite-plugin","3.core-concepts\u002F6.vite-plugin","i-custom-vite",{"title":197,"path":198,"stem":199,"icon":200},"Auto-Redaction","\u002Fcore-concepts\u002Fredaction","3.core-concepts\u002F7.redaction","i-lucide-eye-off",{"title":202,"path":203,"stem":204,"children":205,"page":34},"Frameworks","\u002Fframeworks","4.frameworks",[206,210,215,220,225,230,235,240,245,250,255,260,265,270,274,279,284],{"title":41,"path":207,"stem":208,"icon":209},"\u002Fframeworks\u002Foverview","4.frameworks\u002F00.overview","i-lucide-layout-grid",{"title":211,"path":212,"stem":213,"icon":214},"Nuxt","\u002Fframeworks\u002Fnuxt","4.frameworks\u002F01.nuxt","i-simple-icons-nuxtdotjs",{"title":216,"path":217,"stem":218,"icon":219},"Next.js","\u002Fframeworks\u002Fnextjs","4.frameworks\u002F02.nextjs","i-simple-icons-nextdotjs",{"title":221,"path":222,"stem":223,"icon":224},"SvelteKit","\u002Fframeworks\u002Fsveltekit","4.frameworks\u002F03.sveltekit","i-simple-icons-svelte",{"title":226,"path":227,"stem":228,"icon":229},"Nitro","\u002Fframeworks\u002Fnitro","4.frameworks\u002F04.nitro","i-custom-nitro",{"title":231,"path":232,"stem":233,"icon":234},"TanStack Start","\u002Fframeworks\u002Ftanstack-start","4.frameworks\u002F05.tanstack-start","i-custom-tanstack",{"title":236,"path":237,"stem":238,"icon":239},"NestJS","\u002Fframeworks\u002Fnestjs","4.frameworks\u002F06.nestjs","i-simple-icons-nestjs",{"title":241,"path":242,"stem":243,"icon":244},"Express","\u002Fframeworks\u002Fexpress","4.frameworks\u002F07.express","i-simple-icons-express",{"title":246,"path":247,"stem":248,"icon":249},"Hono","\u002Fframeworks\u002Fhono","4.frameworks\u002F08.hono","i-simple-icons-hono",{"title":251,"path":252,"stem":253,"icon":254},"Fastify","\u002Fframeworks\u002Ffastify","4.frameworks\u002F09.fastify","i-simple-icons-fastify",{"title":256,"path":257,"stem":258,"icon":259},"Elysia","\u002Fframeworks\u002Felysia","4.frameworks\u002F10.elysia","i-custom-elysia",{"title":261,"path":262,"stem":263,"icon":264},"React Router","\u002Fframeworks\u002Freact-router","4.frameworks\u002F11.react-router","i-custom-reactrouter",{"title":266,"path":267,"stem":268,"icon":269},"Cloudflare Workers","\u002Fframeworks\u002Fcloudflare-workers","4.frameworks\u002F12.cloudflare-workers","i-simple-icons-cloudflare",{"title":271,"path":272,"stem":273,"icon":183},"Standalone","\u002Fframeworks\u002Fstandalone","4.frameworks\u002F13.standalone",{"title":275,"path":276,"stem":277,"icon":278},"Astro","\u002Fframeworks\u002Fastro","4.frameworks\u002F14.astro","i-simple-icons-astro",{"title":280,"path":281,"stem":282,"icon":283},"AWS Lambda","\u002Fframeworks\u002Faws-lambda","4.frameworks\u002F16.aws-lambda","i-custom-lambda",{"title":285,"path":286,"stem":287,"icon":288},"Custom Integration","\u002Fframeworks\u002Fcustom-integration","4.frameworks\u002F17.custom-integration","i-lucide-puzzle",{"title":290,"path":291,"stem":292,"children":293,"page":34},"Build On Top","\u002Fbuild-on-top","5.build-on-top",[294],{"title":295,"path":296,"stem":297,"icon":298},"FS reader","\u002Fbuild-on-top\u002Ffs-reader","5.build-on-top\u002F4.fs-reader","i-lucide-folder-search",{"title":300,"path":301,"stem":302,"children":303,"page":34},"Adapters","\u002Fadapters","6.adapters",[304,307,347,362],{"title":41,"path":305,"stem":306,"icon":44},"\u002Fadapters\u002Foverview","6.adapters\u002F01.overview",{"title":308,"path":309,"stem":310,"children":311,"page":34},"Cloud destinations","\u002Fadapters\u002Fcloud","6.adapters\u002F02.cloud",[312,317,322,327,332,337,342],{"title":313,"path":314,"stem":315,"icon":316},"Axiom","\u002Fadapters\u002Fcloud\u002Faxiom","6.adapters\u002F02.cloud\u002F01.axiom","i-custom-axiom",{"title":318,"path":319,"stem":320,"icon":321},"OTLP","\u002Fadapters\u002Fcloud\u002Fotlp","6.adapters\u002F02.cloud\u002F02.otlp","i-simple-icons-opentelemetry",{"title":323,"path":324,"stem":325,"icon":326},"PostHog","\u002Fadapters\u002Fcloud\u002Fposthog","6.adapters\u002F02.cloud\u002F03.posthog","i-simple-icons-posthog",{"title":328,"path":329,"stem":330,"icon":331},"Sentry","\u002Fadapters\u002Fcloud\u002Fsentry","6.adapters\u002F02.cloud\u002F04.sentry","i-simple-icons-sentry",{"title":333,"path":334,"stem":335,"icon":336},"Better Stack","\u002Fadapters\u002Fcloud\u002Fbetter-stack","6.adapters\u002F02.cloud\u002F05.better-stack","i-simple-icons-betterstack",{"title":338,"path":339,"stem":340,"icon":341},"Datadog","\u002Fadapters\u002Fcloud\u002Fdatadog","6.adapters\u002F02.cloud\u002F06.datadog","i-simple-icons-datadog",{"title":343,"path":344,"stem":345,"icon":346},"HyperDX","\u002Fadapters\u002Fcloud\u002Fhyperdx","6.adapters\u002F02.cloud\u002F07.hyperdx","i-custom-hyperdx",{"title":348,"path":349,"stem":350,"children":351,"page":34},"Self-hosted","\u002Fadapters\u002Fself-hosted","6.adapters\u002F03.self-hosted",[352,357],{"title":353,"path":354,"stem":355,"icon":356},"File System","\u002Fadapters\u002Fself-hosted\u002Ffs","6.adapters\u002F03.self-hosted\u002F01.fs","i-lucide-hard-drive",{"title":358,"path":359,"stem":360,"icon":361},"NuxtHub","\u002Fadapters\u002Fself-hosted\u002Fnuxthub","6.adapters\u002F03.self-hosted\u002F02.nuxthub","i-simple-icons-nuxt",{"title":363,"path":364,"stem":365,"children":366,"page":34},"Building blocks","\u002Fadapters\u002Fbuilding-blocks","6.adapters\u002F04.building-blocks",[367,372,377,381],{"title":368,"path":369,"stem":370,"icon":371},"Pipeline","\u002Fadapters\u002Fbuilding-blocks\u002Fpipeline","6.adapters\u002F04.building-blocks\u002F01.pipeline","i-lucide-workflow",{"title":373,"path":374,"stem":375,"icon":376},"HTTP","\u002Fadapters\u002Fbuilding-blocks\u002Fhttp","6.adapters\u002F04.building-blocks\u002F02.http","i-lucide-globe",{"title":378,"path":379,"stem":380,"icon":83},"Custom Adapters","\u002Fadapters\u002Fbuilding-blocks\u002Fcustom","6.adapters\u002F04.building-blocks\u002F03.custom",{"title":382,"path":383,"stem":384,"icon":385},"Toolkit","\u002Fadapters\u002Fbuilding-blocks\u002Ftoolkit","6.adapters\u002F04.building-blocks\u002F04.toolkit","i-lucide-blocks",{"title":387,"path":388,"stem":389,"children":390,"page":34},"Enrichers","\u002Fenrichers","7.enrichers",[391,394,398],{"title":41,"path":392,"stem":393,"icon":28},"\u002Fenrichers\u002Foverview","7.enrichers\u002F1.overview",{"title":395,"path":396,"stem":397,"icon":288},"Built-in","\u002Fenrichers\u002Fbuilt-in","7.enrichers\u002F2.built-in",{"title":399,"path":400,"stem":401,"icon":83},"Custom","\u002Fenrichers\u002Fcustom","7.enrichers\u002F3.custom",{"id":403,"title":241,"body":404,"description":3464,"extension":3465,"links":3466,"meta":3469,"navigation":3470,"path":242,"seo":3471,"stem":243,"__hash__":3472},"docs\u002F4.frameworks\u002F07.express.md",{"type":405,"value":406,"toc":3441},"minimark",[407,420,467,471,476,556,560,882,906,912,915,918,1225,1228,1292,1296,1305,1490,1599,1615,1622,1657,1885,1889,1907,2245,2248,2295,2298,2308,2312,2315,2482,2486,2493,2685,2696,2700,2706,2810,2814,2824,2967,2971,2977,2981,3135,3139,3146,3326,3334,3338,3380,3388,3398,3402,3408,3437],[408,409,410,411,415,416,419],"p",{},"The ",[412,413,414],"code",{},"evlog\u002Fexpress"," middleware auto-creates a request-scoped logger on ",[412,417,418],{},"req.log"," and emits a wide event when the response finishes.",[421,422,425,428,453],"prompt",{":actions":423,"description":424,"icon":244},"[\"copy\",\"cursor\",\"windsurf\"]","Set up evlog in my Express app",[408,426,427],{},"Set up evlog in my Express app.",[429,430,431,435,438,441,444,447,450],"ul",{},[432,433,434],"li",{},"Install evlog: pnpm add evlog",[432,436,437],{},"Call initLogger({ env: { service: 'my-api' } }) at startup",[432,439,440],{},"Alternatively, use evlog\u002Fvite plugin in vite.config.ts for auto-init (replaces initLogger)",[432,442,443],{},"Import evlog middleware from 'evlog\u002Fexpress' and add app.use(evlog())",[432,445,446],{},"Access the logger via req.log in routes or useLogger() anywhere in the call stack",[432,448,449],{},"Use log.set() to accumulate context, throw createError() for structured errors",[432,451,452],{},"Optionally pass drain, enrich, include, and keep options to evlog()",[408,454,455,456,462,463],{},"Docs: ",[457,458,459],"a",{"href":459,"rel":460},"https:\u002F\u002Fwww.evlog.dev\u002Fframeworks\u002Fexpress",[461],"nofollow","\nAdapters: ",[457,464,465],{"href":465,"rel":466},"https:\u002F\u002Fwww.evlog.dev\u002Fadapters",[461],[468,469,20],"h2",{"id":470},"quick-start",[472,473,475],"h3",{"id":474},"_1-install","1. Install",[477,478,479,507,523,539],"code-group",{},[480,481,487],"pre",{"className":482,"code":483,"filename":484,"language":485,"meta":486,"style":486},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog express\n","pnpm","bash","",[412,488,489],{"__ignoreMap":486},[490,491,494,497,501,504],"span",{"class":492,"line":493},"line",1,[490,495,484],{"class":496},"sBMFI",[490,498,500],{"class":499},"sfazB"," add",[490,502,503],{"class":499}," evlog",[490,505,506],{"class":499}," express\n",[480,508,511],{"className":482,"code":509,"filename":510,"language":485,"meta":486,"style":486},"bun add evlog express\n","bun",[412,512,513],{"__ignoreMap":486},[490,514,515,517,519,521],{"class":492,"line":493},[490,516,510],{"class":496},[490,518,500],{"class":499},[490,520,503],{"class":499},[490,522,506],{"class":499},[480,524,527],{"className":482,"code":525,"filename":526,"language":485,"meta":486,"style":486},"yarn add evlog express\n","yarn",[412,528,529],{"__ignoreMap":486},[490,530,531,533,535,537],{"class":492,"line":493},[490,532,526],{"class":496},[490,534,500],{"class":499},[490,536,503],{"class":499},[490,538,506],{"class":499},[480,540,543],{"className":482,"code":541,"filename":542,"language":485,"meta":486,"style":486},"npm install evlog express\n","npm",[412,544,545],{"__ignoreMap":486},[490,546,547,549,552,554],{"class":492,"line":493},[490,548,542],{"class":496},[490,550,551],{"class":499}," install",[490,553,503],{"class":499},[490,555,506],{"class":499},[472,557,559],{"id":558},"_2-initialize-and-register-the-middleware","2. Initialize and register the middleware",[480,561,566],{"className":562,"code":563,"filename":564,"language":565,"meta":486,"style":486},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import express from 'express'\nimport { initLogger } from 'evlog'\nimport { evlog } from 'evlog\u002Fexpress'\n\ninitLogger({\n  env: { service: 'my-api' },\n})\n\nconst app = express()\n\napp.use(evlog())\n\napp.get('\u002Fhealth', (req, res) => {\n  req.log.set({ route: 'health' })\n  res.json({ ok: true })\n})\n\napp.listen(3000)\n","src\u002Findex.ts","typescript",[412,567,568,591,615,634,641,654,682,691,696,715,720,739,744,787,824,852,859,864],{"__ignoreMap":486},[490,569,570,574,578,581,585,588],{"class":492,"line":493},[490,571,573],{"class":572},"s7zQu","import",[490,575,577],{"class":576},"sTEyZ"," express ",[490,579,580],{"class":572},"from",[490,582,584],{"class":583},"sMK4o"," '",[490,586,587],{"class":499},"express",[490,589,590],{"class":583},"'\n",[490,592,594,596,599,602,605,608,610,613],{"class":492,"line":593},2,[490,595,573],{"class":572},[490,597,598],{"class":583}," {",[490,600,601],{"class":576}," initLogger",[490,603,604],{"class":583}," }",[490,606,607],{"class":572}," from",[490,609,584],{"class":583},[490,611,612],{"class":499},"evlog",[490,614,590],{"class":583},[490,616,618,620,622,624,626,628,630,632],{"class":492,"line":617},3,[490,619,573],{"class":572},[490,621,598],{"class":583},[490,623,503],{"class":576},[490,625,604],{"class":583},[490,627,607],{"class":572},[490,629,584],{"class":583},[490,631,414],{"class":499},[490,633,590],{"class":583},[490,635,637],{"class":492,"line":636},4,[490,638,640],{"emptyLinePlaceholder":639},true,"\n",[490,642,644,648,651],{"class":492,"line":643},5,[490,645,647],{"class":646},"s2Zo4","initLogger",[490,649,650],{"class":576},"(",[490,652,653],{"class":583},"{\n",[490,655,657,661,664,666,669,671,673,676,679],{"class":492,"line":656},6,[490,658,660],{"class":659},"swJcz","  env",[490,662,663],{"class":583},":",[490,665,598],{"class":583},[490,667,668],{"class":659}," service",[490,670,663],{"class":583},[490,672,584],{"class":583},[490,674,675],{"class":499},"my-api",[490,677,678],{"class":583},"'",[490,680,681],{"class":583}," },\n",[490,683,685,688],{"class":492,"line":684},7,[490,686,687],{"class":583},"}",[490,689,690],{"class":576},")\n",[490,692,694],{"class":492,"line":693},8,[490,695,640],{"emptyLinePlaceholder":639},[490,697,699,703,706,709,712],{"class":492,"line":698},9,[490,700,702],{"class":701},"spNyl","const",[490,704,705],{"class":576}," app ",[490,707,708],{"class":583},"=",[490,710,711],{"class":646}," express",[490,713,714],{"class":576},"()\n",[490,716,718],{"class":492,"line":717},10,[490,719,640],{"emptyLinePlaceholder":639},[490,721,723,726,729,732,734,736],{"class":492,"line":722},11,[490,724,725],{"class":576},"app",[490,727,728],{"class":583},".",[490,730,731],{"class":646},"use",[490,733,650],{"class":576},[490,735,612],{"class":646},[490,737,738],{"class":576},"())\n",[490,740,742],{"class":492,"line":741},12,[490,743,640],{"emptyLinePlaceholder":639},[490,745,747,749,751,754,756,758,761,763,766,769,773,775,778,781,784],{"class":492,"line":746},13,[490,748,725],{"class":576},[490,750,728],{"class":583},[490,752,753],{"class":646},"get",[490,755,650],{"class":576},[490,757,678],{"class":583},[490,759,760],{"class":499},"\u002Fhealth",[490,762,678],{"class":583},[490,764,765],{"class":583},",",[490,767,768],{"class":583}," (",[490,770,772],{"class":771},"sHdIc","req",[490,774,765],{"class":583},[490,776,777],{"class":771}," res",[490,779,780],{"class":583},")",[490,782,783],{"class":701}," =>",[490,785,786],{"class":583}," {\n",[490,788,790,793,795,798,800,803,805,808,811,813,815,818,820,822],{"class":492,"line":789},14,[490,791,792],{"class":576},"  req",[490,794,728],{"class":583},[490,796,797],{"class":576},"log",[490,799,728],{"class":583},[490,801,802],{"class":646},"set",[490,804,650],{"class":659},[490,806,807],{"class":583},"{",[490,809,810],{"class":659}," route",[490,812,663],{"class":583},[490,814,584],{"class":583},[490,816,817],{"class":499},"health",[490,819,678],{"class":583},[490,821,604],{"class":583},[490,823,690],{"class":659},[490,825,827,830,832,835,837,839,842,844,848,850],{"class":492,"line":826},15,[490,828,829],{"class":576},"  res",[490,831,728],{"class":583},[490,833,834],{"class":646},"json",[490,836,650],{"class":659},[490,838,807],{"class":583},[490,840,841],{"class":659}," ok",[490,843,663],{"class":583},[490,845,847],{"class":846},"sfNiH"," true",[490,849,604],{"class":583},[490,851,690],{"class":659},[490,853,855,857],{"class":492,"line":854},16,[490,856,687],{"class":583},[490,858,690],{"class":576},[490,860,862],{"class":492,"line":861},17,[490,863,640],{"emptyLinePlaceholder":639},[490,865,867,869,871,874,876,880],{"class":492,"line":866},18,[490,868,725],{"class":576},[490,870,728],{"class":583},[490,872,873],{"class":646},"listen",[490,875,650],{"class":576},[490,877,879],{"class":878},"sbssI","3000",[490,881,690],{"class":576},[883,884,886,890,891,897,898,901,902,905],"callout",{"color":885,"icon":195},"info",[887,888,889],"strong",{},"Using Vite?"," The ",[457,892,893,896],{"href":193},[412,894,895],{},"evlog\u002Fvite"," plugin"," replaces the ",[412,899,900],{},"initLogger()"," call with compile-time auto-initialization, strips ",[412,903,904],{},"log.debug()"," from production builds, and injects source locations.",[408,907,908,909,911],{},"The logger is available on ",[412,910,418],{}," with full TypeScript support via module augmentation, so no extra type annotations are needed.",[468,913,51],{"id":914},"wide-events",[408,916,917],{},"Build up context progressively through your handler. One request = one wide event:",[480,919,921],{"className":562,"code":920,"filename":564,"language":565,"meta":486,"style":486},"app.get('\u002Fusers\u002F:id', async (req, res) => {\n  const userId = req.params.id\n\n  req.log.set({ user: { id: userId } })\n\n  const user = await db.findUser(userId)\n  req.log.set({ user: { name: user.name, plan: user.plan } })\n\n  const orders = await db.findOrders(userId)\n  req.log.set({ orders: { count: orders.length, totalRevenue: sum(orders) } })\n\n  res.json({ user, orders })\n})\n",[412,922,923,959,983,987,1023,1027,1053,1107,1111,1135,1193,1197,1219],{"__ignoreMap":486},[490,924,925,927,929,931,933,935,938,940,942,945,947,949,951,953,955,957],{"class":492,"line":493},[490,926,725],{"class":576},[490,928,728],{"class":583},[490,930,753],{"class":646},[490,932,650],{"class":576},[490,934,678],{"class":583},[490,936,937],{"class":499},"\u002Fusers\u002F:id",[490,939,678],{"class":583},[490,941,765],{"class":583},[490,943,944],{"class":701}," async",[490,946,768],{"class":583},[490,948,772],{"class":771},[490,950,765],{"class":583},[490,952,777],{"class":771},[490,954,780],{"class":583},[490,956,783],{"class":701},[490,958,786],{"class":583},[490,960,961,964,967,970,973,975,978,980],{"class":492,"line":593},[490,962,963],{"class":701},"  const",[490,965,966],{"class":576}," userId",[490,968,969],{"class":583}," =",[490,971,972],{"class":576}," req",[490,974,728],{"class":583},[490,976,977],{"class":576},"params",[490,979,728],{"class":583},[490,981,982],{"class":576},"id\n",[490,984,985],{"class":492,"line":617},[490,986,640],{"emptyLinePlaceholder":639},[490,988,989,991,993,995,997,999,1001,1003,1006,1008,1010,1013,1015,1017,1019,1021],{"class":492,"line":636},[490,990,792],{"class":576},[490,992,728],{"class":583},[490,994,797],{"class":576},[490,996,728],{"class":583},[490,998,802],{"class":646},[490,1000,650],{"class":659},[490,1002,807],{"class":583},[490,1004,1005],{"class":659}," user",[490,1007,663],{"class":583},[490,1009,598],{"class":583},[490,1011,1012],{"class":659}," id",[490,1014,663],{"class":583},[490,1016,966],{"class":576},[490,1018,604],{"class":583},[490,1020,604],{"class":583},[490,1022,690],{"class":659},[490,1024,1025],{"class":492,"line":643},[490,1026,640],{"emptyLinePlaceholder":639},[490,1028,1029,1031,1033,1035,1038,1041,1043,1046,1048,1051],{"class":492,"line":656},[490,1030,963],{"class":701},[490,1032,1005],{"class":576},[490,1034,969],{"class":583},[490,1036,1037],{"class":572}," await",[490,1039,1040],{"class":576}," db",[490,1042,728],{"class":583},[490,1044,1045],{"class":646},"findUser",[490,1047,650],{"class":659},[490,1049,1050],{"class":576},"userId",[490,1052,690],{"class":659},[490,1054,1055,1057,1059,1061,1063,1065,1067,1069,1071,1073,1075,1078,1080,1082,1084,1087,1089,1092,1094,1096,1098,1101,1103,1105],{"class":492,"line":684},[490,1056,792],{"class":576},[490,1058,728],{"class":583},[490,1060,797],{"class":576},[490,1062,728],{"class":583},[490,1064,802],{"class":646},[490,1066,650],{"class":659},[490,1068,807],{"class":583},[490,1070,1005],{"class":659},[490,1072,663],{"class":583},[490,1074,598],{"class":583},[490,1076,1077],{"class":659}," name",[490,1079,663],{"class":583},[490,1081,1005],{"class":576},[490,1083,728],{"class":583},[490,1085,1086],{"class":576},"name",[490,1088,765],{"class":583},[490,1090,1091],{"class":659}," plan",[490,1093,663],{"class":583},[490,1095,1005],{"class":576},[490,1097,728],{"class":583},[490,1099,1100],{"class":576},"plan",[490,1102,604],{"class":583},[490,1104,604],{"class":583},[490,1106,690],{"class":659},[490,1108,1109],{"class":492,"line":693},[490,1110,640],{"emptyLinePlaceholder":639},[490,1112,1113,1115,1118,1120,1122,1124,1126,1129,1131,1133],{"class":492,"line":698},[490,1114,963],{"class":701},[490,1116,1117],{"class":576}," orders",[490,1119,969],{"class":583},[490,1121,1037],{"class":572},[490,1123,1040],{"class":576},[490,1125,728],{"class":583},[490,1127,1128],{"class":646},"findOrders",[490,1130,650],{"class":659},[490,1132,1050],{"class":576},[490,1134,690],{"class":659},[490,1136,1137,1139,1141,1143,1145,1147,1149,1151,1153,1155,1157,1160,1162,1164,1166,1169,1171,1174,1176,1179,1181,1184,1187,1189,1191],{"class":492,"line":717},[490,1138,792],{"class":576},[490,1140,728],{"class":583},[490,1142,797],{"class":576},[490,1144,728],{"class":583},[490,1146,802],{"class":646},[490,1148,650],{"class":659},[490,1150,807],{"class":583},[490,1152,1117],{"class":659},[490,1154,663],{"class":583},[490,1156,598],{"class":583},[490,1158,1159],{"class":659}," count",[490,1161,663],{"class":583},[490,1163,1117],{"class":576},[490,1165,728],{"class":583},[490,1167,1168],{"class":576},"length",[490,1170,765],{"class":583},[490,1172,1173],{"class":659}," totalRevenue",[490,1175,663],{"class":583},[490,1177,1178],{"class":646}," sum",[490,1180,650],{"class":659},[490,1182,1183],{"class":576},"orders",[490,1185,1186],{"class":659},") ",[490,1188,687],{"class":583},[490,1190,604],{"class":583},[490,1192,690],{"class":659},[490,1194,1195],{"class":492,"line":722},[490,1196,640],{"emptyLinePlaceholder":639},[490,1198,1199,1201,1203,1205,1207,1209,1211,1213,1215,1217],{"class":492,"line":741},[490,1200,829],{"class":576},[490,1202,728],{"class":583},[490,1204,834],{"class":646},[490,1206,650],{"class":659},[490,1208,807],{"class":583},[490,1210,1005],{"class":576},[490,1212,765],{"class":583},[490,1214,1117],{"class":576},[490,1216,604],{"class":583},[490,1218,690],{"class":659},[490,1220,1221,1223],{"class":492,"line":746},[490,1222,687],{"class":583},[490,1224,690],{"class":576},[408,1226,1227],{},"All fields are merged into a single wide event emitted when the response finishes:",[480,1229,1232],{"className":482,"code":1230,"filename":1231,"language":485,"meta":486,"style":486},"14:58:15 INFO [my-api] GET \u002Fusers\u002Fusr_123 200 in 12ms\n  ├─ orders: count=2 totalRevenue=6298\n  ├─ user: id=usr_123 name=Alice plan=pro\n  └─ requestId: 4a8ff3a8-...\n","Terminal output",[412,1233,1234,1245,1265,1281],{"__ignoreMap":486},[490,1235,1236,1239,1242],{"class":492,"line":493},[490,1237,1238],{"class":496},"14:58:15",[490,1240,1241],{"class":499}," INFO",[490,1243,1244],{"class":576}," [my-api] GET \u002Fusers\u002Fusr_123 200 in 12ms\n",[490,1246,1247,1250,1253,1256,1259,1262],{"class":492,"line":593},[490,1248,1249],{"class":496},"  ├─",[490,1251,1252],{"class":499}," orders:",[490,1254,1255],{"class":499}," count=",[490,1257,1258],{"class":878},"2",[490,1260,1261],{"class":499}," totalRevenue=",[490,1263,1264],{"class":878},"6298\n",[490,1266,1267,1269,1272,1275,1278],{"class":492,"line":617},[490,1268,1249],{"class":496},[490,1270,1271],{"class":499}," user:",[490,1273,1274],{"class":499}," id=usr_123",[490,1276,1277],{"class":499}," name=Alice",[490,1279,1280],{"class":499}," plan=pro\n",[490,1282,1283,1286,1289],{"class":492,"line":636},[490,1284,1285],{"class":496},"  └─",[490,1287,1288],{"class":499}," requestId:",[490,1290,1291],{"class":499}," 4a8ff3a8-...\n",[468,1293,1295],{"id":1294},"uselogger","useLogger()",[408,1297,1298,1299,1301,1302,1304],{},"Use ",[412,1300,1295],{}," to access the request-scoped logger from anywhere in the call stack without passing ",[412,1303,772],{}," through your service layer:",[480,1306,1309],{"className":562,"code":1307,"filename":1308,"language":565,"meta":486,"style":486},"import { useLogger } from 'evlog\u002Fexpress'\n\nexport async function findUser(id: string) {\n  const log = useLogger()\n  log.set({ user: { id } })\n\n  const user = await db.findUser(id)\n  log.set({ user: { name: user.name, plan: user.plan } })\n\n  return user\n}\n","src\u002Fservices\u002Fuser.ts",[412,1310,1311,1330,1334,1361,1374,1401,1405,1427,1473,1477,1485],{"__ignoreMap":486},[490,1312,1313,1315,1317,1320,1322,1324,1326,1328],{"class":492,"line":493},[490,1314,573],{"class":572},[490,1316,598],{"class":583},[490,1318,1319],{"class":576}," useLogger",[490,1321,604],{"class":583},[490,1323,607],{"class":572},[490,1325,584],{"class":583},[490,1327,414],{"class":499},[490,1329,590],{"class":583},[490,1331,1332],{"class":492,"line":593},[490,1333,640],{"emptyLinePlaceholder":639},[490,1335,1336,1339,1341,1344,1347,1349,1352,1354,1357,1359],{"class":492,"line":617},[490,1337,1338],{"class":572},"export",[490,1340,944],{"class":701},[490,1342,1343],{"class":701}," function",[490,1345,1346],{"class":646}," findUser",[490,1348,650],{"class":583},[490,1350,1351],{"class":771},"id",[490,1353,663],{"class":583},[490,1355,1356],{"class":496}," string",[490,1358,780],{"class":583},[490,1360,786],{"class":583},[490,1362,1363,1365,1368,1370,1372],{"class":492,"line":636},[490,1364,963],{"class":701},[490,1366,1367],{"class":576}," log",[490,1369,969],{"class":583},[490,1371,1319],{"class":646},[490,1373,714],{"class":659},[490,1375,1376,1379,1381,1383,1385,1387,1389,1391,1393,1395,1397,1399],{"class":492,"line":643},[490,1377,1378],{"class":576},"  log",[490,1380,728],{"class":583},[490,1382,802],{"class":646},[490,1384,650],{"class":659},[490,1386,807],{"class":583},[490,1388,1005],{"class":659},[490,1390,663],{"class":583},[490,1392,598],{"class":583},[490,1394,1012],{"class":576},[490,1396,604],{"class":583},[490,1398,604],{"class":583},[490,1400,690],{"class":659},[490,1402,1403],{"class":492,"line":656},[490,1404,640],{"emptyLinePlaceholder":639},[490,1406,1407,1409,1411,1413,1415,1417,1419,1421,1423,1425],{"class":492,"line":684},[490,1408,963],{"class":701},[490,1410,1005],{"class":576},[490,1412,969],{"class":583},[490,1414,1037],{"class":572},[490,1416,1040],{"class":576},[490,1418,728],{"class":583},[490,1420,1045],{"class":646},[490,1422,650],{"class":659},[490,1424,1351],{"class":576},[490,1426,690],{"class":659},[490,1428,1429,1431,1433,1435,1437,1439,1441,1443,1445,1447,1449,1451,1453,1455,1457,1459,1461,1463,1465,1467,1469,1471],{"class":492,"line":693},[490,1430,1378],{"class":576},[490,1432,728],{"class":583},[490,1434,802],{"class":646},[490,1436,650],{"class":659},[490,1438,807],{"class":583},[490,1440,1005],{"class":659},[490,1442,663],{"class":583},[490,1444,598],{"class":583},[490,1446,1077],{"class":659},[490,1448,663],{"class":583},[490,1450,1005],{"class":576},[490,1452,728],{"class":583},[490,1454,1086],{"class":576},[490,1456,765],{"class":583},[490,1458,1091],{"class":659},[490,1460,663],{"class":583},[490,1462,1005],{"class":576},[490,1464,728],{"class":583},[490,1466,1100],{"class":576},[490,1468,604],{"class":583},[490,1470,604],{"class":583},[490,1472,690],{"class":659},[490,1474,1475],{"class":492,"line":698},[490,1476,640],{"emptyLinePlaceholder":639},[490,1478,1479,1482],{"class":492,"line":717},[490,1480,1481],{"class":572},"  return",[490,1483,1484],{"class":576}," user\n",[490,1486,1487],{"class":492,"line":722},[490,1488,1489],{"class":583},"}\n",[480,1491,1493],{"className":562,"code":1492,"filename":564,"language":565,"meta":486,"style":486},"import { findUser } from '.\u002Fservices\u002Fuser'\n\napp.get('\u002Fusers\u002F:id', async (req, res) => {\n  const user = await findUser(req.params.id)\n  res.json(user)\n})\n",[412,1494,1495,1514,1518,1552,1578,1593],{"__ignoreMap":486},[490,1496,1497,1499,1501,1503,1505,1507,1509,1512],{"class":492,"line":493},[490,1498,573],{"class":572},[490,1500,598],{"class":583},[490,1502,1346],{"class":576},[490,1504,604],{"class":583},[490,1506,607],{"class":572},[490,1508,584],{"class":583},[490,1510,1511],{"class":499},".\u002Fservices\u002Fuser",[490,1513,590],{"class":583},[490,1515,1516],{"class":492,"line":593},[490,1517,640],{"emptyLinePlaceholder":639},[490,1519,1520,1522,1524,1526,1528,1530,1532,1534,1536,1538,1540,1542,1544,1546,1548,1550],{"class":492,"line":617},[490,1521,725],{"class":576},[490,1523,728],{"class":583},[490,1525,753],{"class":646},[490,1527,650],{"class":576},[490,1529,678],{"class":583},[490,1531,937],{"class":499},[490,1533,678],{"class":583},[490,1535,765],{"class":583},[490,1537,944],{"class":701},[490,1539,768],{"class":583},[490,1541,772],{"class":771},[490,1543,765],{"class":583},[490,1545,777],{"class":771},[490,1547,780],{"class":583},[490,1549,783],{"class":701},[490,1551,786],{"class":583},[490,1553,1554,1556,1558,1560,1562,1564,1566,1568,1570,1572,1574,1576],{"class":492,"line":636},[490,1555,963],{"class":701},[490,1557,1005],{"class":576},[490,1559,969],{"class":583},[490,1561,1037],{"class":572},[490,1563,1346],{"class":646},[490,1565,650],{"class":659},[490,1567,772],{"class":576},[490,1569,728],{"class":583},[490,1571,977],{"class":576},[490,1573,728],{"class":583},[490,1575,1351],{"class":576},[490,1577,690],{"class":659},[490,1579,1580,1582,1584,1586,1588,1591],{"class":492,"line":643},[490,1581,829],{"class":576},[490,1583,728],{"class":583},[490,1585,834],{"class":646},[490,1587,650],{"class":659},[490,1589,1590],{"class":576},"user",[490,1592,690],{"class":659},[490,1594,1595,1597],{"class":492,"line":656},[490,1596,687],{"class":583},[490,1598,690],{"class":576},[408,1600,1601,1602,1604,1605,1607,1608,1610,1611,1614],{},"Both ",[412,1603,418],{}," and ",[412,1606,1295],{}," return the same logger instance. ",[412,1609,1295],{}," uses ",[412,1612,1613],{},"AsyncLocalStorage"," to propagate the logger across async boundaries.",[468,1616,1618,1619,780],{"id":1617},"background-work-logfork","Background work (",[412,1620,1621],{},"log.fork",[408,1623,1624,1625,1628,1629,1634,1635,1637,1638,1641,1642,1645,1646,1604,1649,1652,1653,728],{},"Fire-and-forget async work that finishes ",[887,1626,1627],{},"after"," the response can no longer update the request wide event (the logger is sealed after emit). Use ",[887,1630,1631],{},[412,1632,1633],{},"req.log.fork(label, fn)"," so ",[412,1636,1295],{}," inside ",[412,1639,1640],{},"fn"," targets a ",[887,1643,1644],{},"child"," logger that emits its own event with ",[412,1647,1648],{},"operation",[412,1650,1651],{},"_parentRequestId",". See ",[457,1654,1656],{"href":1655},"\u002Flogging\u002Fwide-events#after-emit-sealing-and-background-work","Wide events — After emit",[480,1658,1660],{"className":562,"code":1659,"filename":564,"language":565,"meta":486,"style":486},"import { evlog, useLogger } from 'evlog\u002Fexpress'\n\napp.use(evlog())\n\napp.post('\u002Forders', (req, res) => {\n  req.log.set({ orderId: 'ord_1' })\n  req.log.fork!('fulfill_order', async () => {\n    const log = useLogger()\n    log.set({ step: 'inventory_ok' })\n  })\n  res.json({ ok: true })\n})\n",[412,1661,1662,1684,1688,1702,1706,1740,1772,1808,1821,1850,1857,1879],{"__ignoreMap":486},[490,1663,1664,1666,1668,1670,1672,1674,1676,1678,1680,1682],{"class":492,"line":493},[490,1665,573],{"class":572},[490,1667,598],{"class":583},[490,1669,503],{"class":576},[490,1671,765],{"class":583},[490,1673,1319],{"class":576},[490,1675,604],{"class":583},[490,1677,607],{"class":572},[490,1679,584],{"class":583},[490,1681,414],{"class":499},[490,1683,590],{"class":583},[490,1685,1686],{"class":492,"line":593},[490,1687,640],{"emptyLinePlaceholder":639},[490,1689,1690,1692,1694,1696,1698,1700],{"class":492,"line":617},[490,1691,725],{"class":576},[490,1693,728],{"class":583},[490,1695,731],{"class":646},[490,1697,650],{"class":576},[490,1699,612],{"class":646},[490,1701,738],{"class":576},[490,1703,1704],{"class":492,"line":636},[490,1705,640],{"emptyLinePlaceholder":639},[490,1707,1708,1710,1712,1715,1717,1719,1722,1724,1726,1728,1730,1732,1734,1736,1738],{"class":492,"line":643},[490,1709,725],{"class":576},[490,1711,728],{"class":583},[490,1713,1714],{"class":646},"post",[490,1716,650],{"class":576},[490,1718,678],{"class":583},[490,1720,1721],{"class":499},"\u002Forders",[490,1723,678],{"class":583},[490,1725,765],{"class":583},[490,1727,768],{"class":583},[490,1729,772],{"class":771},[490,1731,765],{"class":583},[490,1733,777],{"class":771},[490,1735,780],{"class":583},[490,1737,783],{"class":701},[490,1739,786],{"class":583},[490,1741,1742,1744,1746,1748,1750,1752,1754,1756,1759,1761,1763,1766,1768,1770],{"class":492,"line":656},[490,1743,792],{"class":576},[490,1745,728],{"class":583},[490,1747,797],{"class":576},[490,1749,728],{"class":583},[490,1751,802],{"class":646},[490,1753,650],{"class":659},[490,1755,807],{"class":583},[490,1757,1758],{"class":659}," orderId",[490,1760,663],{"class":583},[490,1762,584],{"class":583},[490,1764,1765],{"class":499},"ord_1",[490,1767,678],{"class":583},[490,1769,604],{"class":583},[490,1771,690],{"class":659},[490,1773,1774,1776,1778,1780,1782,1785,1788,1790,1792,1795,1797,1799,1801,1804,1806],{"class":492,"line":684},[490,1775,792],{"class":576},[490,1777,728],{"class":583},[490,1779,797],{"class":576},[490,1781,728],{"class":583},[490,1783,1784],{"class":646},"fork",[490,1786,1787],{"class":583},"!",[490,1789,650],{"class":659},[490,1791,678],{"class":583},[490,1793,1794],{"class":499},"fulfill_order",[490,1796,678],{"class":583},[490,1798,765],{"class":583},[490,1800,944],{"class":701},[490,1802,1803],{"class":583}," ()",[490,1805,783],{"class":701},[490,1807,786],{"class":583},[490,1809,1810,1813,1815,1817,1819],{"class":492,"line":693},[490,1811,1812],{"class":701},"    const",[490,1814,1367],{"class":576},[490,1816,969],{"class":583},[490,1818,1319],{"class":646},[490,1820,714],{"class":659},[490,1822,1823,1826,1828,1830,1832,1834,1837,1839,1841,1844,1846,1848],{"class":492,"line":698},[490,1824,1825],{"class":576},"    log",[490,1827,728],{"class":583},[490,1829,802],{"class":646},[490,1831,650],{"class":659},[490,1833,807],{"class":583},[490,1835,1836],{"class":659}," step",[490,1838,663],{"class":583},[490,1840,584],{"class":583},[490,1842,1843],{"class":499},"inventory_ok",[490,1845,678],{"class":583},[490,1847,604],{"class":583},[490,1849,690],{"class":659},[490,1851,1852,1855],{"class":492,"line":717},[490,1853,1854],{"class":583},"  }",[490,1856,690],{"class":659},[490,1858,1859,1861,1863,1865,1867,1869,1871,1873,1875,1877],{"class":492,"line":722},[490,1860,829],{"class":576},[490,1862,728],{"class":583},[490,1864,834],{"class":646},[490,1866,650],{"class":659},[490,1868,807],{"class":583},[490,1870,841],{"class":659},[490,1872,663],{"class":583},[490,1874,847],{"class":846},[490,1876,604],{"class":583},[490,1878,690],{"class":659},[490,1880,1881,1883],{"class":492,"line":741},[490,1882,687],{"class":583},[490,1884,690],{"class":576},[468,1886,1888],{"id":1887},"error-handling","Error Handling",[408,1890,1298,1891,1894,1895,1898,1899,1902,1903,1906],{},[412,1892,1893],{},"createError"," for structured errors with ",[412,1896,1897],{},"why",", ",[412,1900,1901],{},"fix",", and ",[412,1904,1905],{},"link"," fields. Express uses a 4-argument error handler middleware:",[480,1908,1910],{"className":562,"code":1909,"filename":564,"language":565,"meta":486,"style":486},"import { createError, parseError } from 'evlog'\n\napp.get('\u002Fcheckout', () => {\n  throw createError({\n    message: 'Payment failed',\n    status: 402,\n    why: 'Card declined by issuer',\n    fix: 'Try a different payment method',\n    link: 'https:\u002F\u002Fdocs.example.com\u002Fpayments\u002Fdeclined',\n  })\n})\n\napp.use((err, req, res, next) => {\n  req.log.error(err)\n  const parsed = parseError(err)\n\n  res.status(parsed.status).json({\n    message: parsed.message,\n    why: parsed.why,\n    fix: parsed.fix,\n    link: parsed.link,\n  })\n})\n",[412,1911,1912,1936,1940,1965,1976,1993,2005,2021,2037,2053,2059,2065,2069,2103,2122,2139,2143,2171,2186,2201,2216,2231,2238],{"__ignoreMap":486},[490,1913,1914,1916,1918,1921,1923,1926,1928,1930,1932,1934],{"class":492,"line":493},[490,1915,573],{"class":572},[490,1917,598],{"class":583},[490,1919,1920],{"class":576}," createError",[490,1922,765],{"class":583},[490,1924,1925],{"class":576}," parseError",[490,1927,604],{"class":583},[490,1929,607],{"class":572},[490,1931,584],{"class":583},[490,1933,612],{"class":499},[490,1935,590],{"class":583},[490,1937,1938],{"class":492,"line":593},[490,1939,640],{"emptyLinePlaceholder":639},[490,1941,1942,1944,1946,1948,1950,1952,1955,1957,1959,1961,1963],{"class":492,"line":617},[490,1943,725],{"class":576},[490,1945,728],{"class":583},[490,1947,753],{"class":646},[490,1949,650],{"class":576},[490,1951,678],{"class":583},[490,1953,1954],{"class":499},"\u002Fcheckout",[490,1956,678],{"class":583},[490,1958,765],{"class":583},[490,1960,1803],{"class":583},[490,1962,783],{"class":701},[490,1964,786],{"class":583},[490,1966,1967,1970,1972,1974],{"class":492,"line":636},[490,1968,1969],{"class":572},"  throw",[490,1971,1920],{"class":646},[490,1973,650],{"class":659},[490,1975,653],{"class":583},[490,1977,1978,1981,1983,1985,1988,1990],{"class":492,"line":643},[490,1979,1980],{"class":659},"    message",[490,1982,663],{"class":583},[490,1984,584],{"class":583},[490,1986,1987],{"class":499},"Payment failed",[490,1989,678],{"class":583},[490,1991,1992],{"class":583},",\n",[490,1994,1995,1998,2000,2003],{"class":492,"line":656},[490,1996,1997],{"class":659},"    status",[490,1999,663],{"class":583},[490,2001,2002],{"class":878}," 402",[490,2004,1992],{"class":583},[490,2006,2007,2010,2012,2014,2017,2019],{"class":492,"line":684},[490,2008,2009],{"class":659},"    why",[490,2011,663],{"class":583},[490,2013,584],{"class":583},[490,2015,2016],{"class":499},"Card declined by issuer",[490,2018,678],{"class":583},[490,2020,1992],{"class":583},[490,2022,2023,2026,2028,2030,2033,2035],{"class":492,"line":693},[490,2024,2025],{"class":659},"    fix",[490,2027,663],{"class":583},[490,2029,584],{"class":583},[490,2031,2032],{"class":499},"Try a different payment method",[490,2034,678],{"class":583},[490,2036,1992],{"class":583},[490,2038,2039,2042,2044,2046,2049,2051],{"class":492,"line":698},[490,2040,2041],{"class":659},"    link",[490,2043,663],{"class":583},[490,2045,584],{"class":583},[490,2047,2048],{"class":499},"https:\u002F\u002Fdocs.example.com\u002Fpayments\u002Fdeclined",[490,2050,678],{"class":583},[490,2052,1992],{"class":583},[490,2054,2055,2057],{"class":492,"line":717},[490,2056,1854],{"class":583},[490,2058,690],{"class":659},[490,2060,2061,2063],{"class":492,"line":722},[490,2062,687],{"class":583},[490,2064,690],{"class":576},[490,2066,2067],{"class":492,"line":741},[490,2068,640],{"emptyLinePlaceholder":639},[490,2070,2071,2073,2075,2077,2079,2081,2084,2086,2088,2090,2092,2094,2097,2099,2101],{"class":492,"line":746},[490,2072,725],{"class":576},[490,2074,728],{"class":583},[490,2076,731],{"class":646},[490,2078,650],{"class":576},[490,2080,650],{"class":583},[490,2082,2083],{"class":771},"err",[490,2085,765],{"class":583},[490,2087,972],{"class":771},[490,2089,765],{"class":583},[490,2091,777],{"class":771},[490,2093,765],{"class":583},[490,2095,2096],{"class":771}," next",[490,2098,780],{"class":583},[490,2100,783],{"class":701},[490,2102,786],{"class":583},[490,2104,2105,2107,2109,2111,2113,2116,2118,2120],{"class":492,"line":789},[490,2106,792],{"class":576},[490,2108,728],{"class":583},[490,2110,797],{"class":576},[490,2112,728],{"class":583},[490,2114,2115],{"class":646},"error",[490,2117,650],{"class":659},[490,2119,2083],{"class":576},[490,2121,690],{"class":659},[490,2123,2124,2126,2129,2131,2133,2135,2137],{"class":492,"line":826},[490,2125,963],{"class":701},[490,2127,2128],{"class":576}," parsed",[490,2130,969],{"class":583},[490,2132,1925],{"class":646},[490,2134,650],{"class":659},[490,2136,2083],{"class":576},[490,2138,690],{"class":659},[490,2140,2141],{"class":492,"line":854},[490,2142,640],{"emptyLinePlaceholder":639},[490,2144,2145,2147,2149,2152,2154,2157,2159,2161,2163,2165,2167,2169],{"class":492,"line":861},[490,2146,829],{"class":576},[490,2148,728],{"class":583},[490,2150,2151],{"class":646},"status",[490,2153,650],{"class":659},[490,2155,2156],{"class":576},"parsed",[490,2158,728],{"class":583},[490,2160,2151],{"class":576},[490,2162,780],{"class":659},[490,2164,728],{"class":583},[490,2166,834],{"class":646},[490,2168,650],{"class":659},[490,2170,653],{"class":583},[490,2172,2173,2175,2177,2179,2181,2184],{"class":492,"line":866},[490,2174,1980],{"class":659},[490,2176,663],{"class":583},[490,2178,2128],{"class":576},[490,2180,728],{"class":583},[490,2182,2183],{"class":576},"message",[490,2185,1992],{"class":583},[490,2187,2189,2191,2193,2195,2197,2199],{"class":492,"line":2188},19,[490,2190,2009],{"class":659},[490,2192,663],{"class":583},[490,2194,2128],{"class":576},[490,2196,728],{"class":583},[490,2198,1897],{"class":576},[490,2200,1992],{"class":583},[490,2202,2204,2206,2208,2210,2212,2214],{"class":492,"line":2203},20,[490,2205,2025],{"class":659},[490,2207,663],{"class":583},[490,2209,2128],{"class":576},[490,2211,728],{"class":583},[490,2213,1901],{"class":576},[490,2215,1992],{"class":583},[490,2217,2219,2221,2223,2225,2227,2229],{"class":492,"line":2218},21,[490,2220,2041],{"class":659},[490,2222,663],{"class":583},[490,2224,2128],{"class":576},[490,2226,728],{"class":583},[490,2228,1905],{"class":576},[490,2230,1992],{"class":583},[490,2232,2234,2236],{"class":492,"line":2233},22,[490,2235,1854],{"class":583},[490,2237,690],{"class":659},[490,2239,2241,2243],{"class":492,"line":2240},23,[490,2242,687],{"class":583},[490,2244,690],{"class":576},[408,2246,2247],{},"The error is captured and logged with both the custom context and structured error fields:",[480,2249,2251],{"className":482,"code":2250,"filename":1231,"language":485,"meta":486,"style":486},"14:58:20 ERROR [my-api] GET \u002Fcheckout 402 in 3ms\n  ├─ error: name=EvlogError message=Payment failed status=402\n  └─ requestId: 880a50ac-...\n",[412,2252,2253,2264,2286],{"__ignoreMap":486},[490,2254,2255,2258,2261],{"class":492,"line":493},[490,2256,2257],{"class":496},"14:58:20",[490,2259,2260],{"class":499}," ERROR",[490,2262,2263],{"class":576}," [my-api] GET \u002Fcheckout 402 in 3ms\n",[490,2265,2266,2268,2271,2274,2277,2280,2283],{"class":492,"line":593},[490,2267,1249],{"class":496},[490,2269,2270],{"class":499}," error:",[490,2272,2273],{"class":499}," name=EvlogError",[490,2275,2276],{"class":499}," message=Payment",[490,2278,2279],{"class":499}," failed",[490,2281,2282],{"class":499}," status=",[490,2284,2285],{"class":878},"402\n",[490,2287,2288,2290,2292],{"class":492,"line":617},[490,2289,1285],{"class":496},[490,2291,1288],{"class":499},[490,2293,2294],{"class":499}," 880a50ac-...\n",[468,2296,170],{"id":2297},"configuration",[408,2299,2300,2301,2304,2305,2307],{},"See the ",[457,2302,2303],{"href":171},"Configuration reference"," for all available options (",[412,2306,647],{},", middleware options, sampling, silent mode, etc.).",[468,2309,2311],{"id":2310},"drain-enrichers","Drain & Enrichers",[408,2313,2314],{},"Configure drain adapters and enrichers directly in the middleware options:",[480,2316,2318],{"className":562,"code":2317,"filename":564,"language":565,"meta":486,"style":486},"import { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { createUserAgentEnricher } from 'evlog\u002Fenrichers'\n\nconst userAgent = createUserAgentEnricher()\n\napp.use(evlog({\n  drain: createAxiomDrain(),\n  enrich: (ctx) => {\n    userAgent(ctx)\n    ctx.event.region = process.env.FLY_REGION\n  },\n}))\n",[412,2319,2320,2340,2360,2364,2377,2381,2397,2411,2429,2440,2470,2475],{"__ignoreMap":486},[490,2321,2322,2324,2326,2329,2331,2333,2335,2338],{"class":492,"line":493},[490,2323,573],{"class":572},[490,2325,598],{"class":583},[490,2327,2328],{"class":576}," createAxiomDrain",[490,2330,604],{"class":583},[490,2332,607],{"class":572},[490,2334,584],{"class":583},[490,2336,2337],{"class":499},"evlog\u002Faxiom",[490,2339,590],{"class":583},[490,2341,2342,2344,2346,2349,2351,2353,2355,2358],{"class":492,"line":593},[490,2343,573],{"class":572},[490,2345,598],{"class":583},[490,2347,2348],{"class":576}," createUserAgentEnricher",[490,2350,604],{"class":583},[490,2352,607],{"class":572},[490,2354,584],{"class":583},[490,2356,2357],{"class":499},"evlog\u002Fenrichers",[490,2359,590],{"class":583},[490,2361,2362],{"class":492,"line":617},[490,2363,640],{"emptyLinePlaceholder":639},[490,2365,2366,2368,2371,2373,2375],{"class":492,"line":636},[490,2367,702],{"class":701},[490,2369,2370],{"class":576}," userAgent ",[490,2372,708],{"class":583},[490,2374,2348],{"class":646},[490,2376,714],{"class":576},[490,2378,2379],{"class":492,"line":643},[490,2380,640],{"emptyLinePlaceholder":639},[490,2382,2383,2385,2387,2389,2391,2393,2395],{"class":492,"line":656},[490,2384,725],{"class":576},[490,2386,728],{"class":583},[490,2388,731],{"class":646},[490,2390,650],{"class":576},[490,2392,612],{"class":646},[490,2394,650],{"class":576},[490,2396,653],{"class":583},[490,2398,2399,2402,2404,2406,2409],{"class":492,"line":684},[490,2400,2401],{"class":659},"  drain",[490,2403,663],{"class":583},[490,2405,2328],{"class":646},[490,2407,2408],{"class":576},"()",[490,2410,1992],{"class":583},[490,2412,2413,2416,2418,2420,2423,2425,2427],{"class":492,"line":693},[490,2414,2415],{"class":646},"  enrich",[490,2417,663],{"class":583},[490,2419,768],{"class":583},[490,2421,2422],{"class":771},"ctx",[490,2424,780],{"class":583},[490,2426,783],{"class":701},[490,2428,786],{"class":583},[490,2430,2431,2434,2436,2438],{"class":492,"line":698},[490,2432,2433],{"class":646},"    userAgent",[490,2435,650],{"class":659},[490,2437,2422],{"class":576},[490,2439,690],{"class":659},[490,2441,2442,2445,2447,2450,2452,2455,2457,2460,2462,2465,2467],{"class":492,"line":717},[490,2443,2444],{"class":576},"    ctx",[490,2446,728],{"class":583},[490,2448,2449],{"class":576},"event",[490,2451,728],{"class":583},[490,2453,2454],{"class":576},"region",[490,2456,969],{"class":583},[490,2458,2459],{"class":576}," process",[490,2461,728],{"class":583},[490,2463,2464],{"class":576},"env",[490,2466,728],{"class":583},[490,2468,2469],{"class":576},"FLY_REGION\n",[490,2471,2472],{"class":492,"line":722},[490,2473,2474],{"class":583},"  },\n",[490,2476,2477,2479],{"class":492,"line":741},[490,2478,687],{"class":583},[490,2480,2481],{"class":576},"))\n",[472,2483,2485],{"id":2484},"pipeline-batching-retry","Pipeline (Batching & Retry)",[408,2487,2488,2489,2492],{},"For production, wrap your adapter with ",[412,2490,2491],{},"createDrainPipeline"," to batch events and retry on failure:",[480,2494,2496],{"className":562,"code":2495,"filename":564,"language":565,"meta":486,"style":486},"import type { DrainContext } from 'evlog'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\n\nconst pipeline = createDrainPipeline\u003CDrainContext>({\n  batch: { size: 50, intervalMs: 5000 },\n  retry: { maxAttempts: 3 },\n})\nconst drain = pipeline(createAxiomDrain())\n\napp.use(evlog({ drain }))\n",[412,2497,2498,2520,2538,2558,2562,2586,2615,2634,2640,2659,2663],{"__ignoreMap":486},[490,2499,2500,2502,2505,2507,2510,2512,2514,2516,2518],{"class":492,"line":493},[490,2501,573],{"class":572},[490,2503,2504],{"class":572}," type",[490,2506,598],{"class":583},[490,2508,2509],{"class":576}," DrainContext",[490,2511,604],{"class":583},[490,2513,607],{"class":572},[490,2515,584],{"class":583},[490,2517,612],{"class":499},[490,2519,590],{"class":583},[490,2521,2522,2524,2526,2528,2530,2532,2534,2536],{"class":492,"line":593},[490,2523,573],{"class":572},[490,2525,598],{"class":583},[490,2527,2328],{"class":576},[490,2529,604],{"class":583},[490,2531,607],{"class":572},[490,2533,584],{"class":583},[490,2535,2337],{"class":499},[490,2537,590],{"class":583},[490,2539,2540,2542,2544,2547,2549,2551,2553,2556],{"class":492,"line":617},[490,2541,573],{"class":572},[490,2543,598],{"class":583},[490,2545,2546],{"class":576}," createDrainPipeline",[490,2548,604],{"class":583},[490,2550,607],{"class":572},[490,2552,584],{"class":583},[490,2554,2555],{"class":499},"evlog\u002Fpipeline",[490,2557,590],{"class":583},[490,2559,2560],{"class":492,"line":636},[490,2561,640],{"emptyLinePlaceholder":639},[490,2563,2564,2566,2569,2571,2573,2576,2579,2582,2584],{"class":492,"line":643},[490,2565,702],{"class":701},[490,2567,2568],{"class":576}," pipeline ",[490,2570,708],{"class":583},[490,2572,2546],{"class":646},[490,2574,2575],{"class":583},"\u003C",[490,2577,2578],{"class":496},"DrainContext",[490,2580,2581],{"class":583},">",[490,2583,650],{"class":576},[490,2585,653],{"class":583},[490,2587,2588,2591,2593,2595,2598,2600,2603,2605,2608,2610,2613],{"class":492,"line":656},[490,2589,2590],{"class":659},"  batch",[490,2592,663],{"class":583},[490,2594,598],{"class":583},[490,2596,2597],{"class":659}," size",[490,2599,663],{"class":583},[490,2601,2602],{"class":878}," 50",[490,2604,765],{"class":583},[490,2606,2607],{"class":659}," intervalMs",[490,2609,663],{"class":583},[490,2611,2612],{"class":878}," 5000",[490,2614,681],{"class":583},[490,2616,2617,2620,2622,2624,2627,2629,2632],{"class":492,"line":684},[490,2618,2619],{"class":659},"  retry",[490,2621,663],{"class":583},[490,2623,598],{"class":583},[490,2625,2626],{"class":659}," maxAttempts",[490,2628,663],{"class":583},[490,2630,2631],{"class":878}," 3",[490,2633,681],{"class":583},[490,2635,2636,2638],{"class":492,"line":693},[490,2637,687],{"class":583},[490,2639,690],{"class":576},[490,2641,2642,2644,2647,2649,2652,2654,2657],{"class":492,"line":698},[490,2643,702],{"class":701},[490,2645,2646],{"class":576}," drain ",[490,2648,708],{"class":583},[490,2650,2651],{"class":646}," pipeline",[490,2653,650],{"class":576},[490,2655,2656],{"class":646},"createAxiomDrain",[490,2658,738],{"class":576},[490,2660,2661],{"class":492,"line":717},[490,2662,640],{"emptyLinePlaceholder":639},[490,2664,2665,2667,2669,2671,2673,2675,2677,2679,2681,2683],{"class":492,"line":722},[490,2666,725],{"class":576},[490,2668,728],{"class":583},[490,2670,731],{"class":646},[490,2672,650],{"class":576},[490,2674,612],{"class":646},[490,2676,650],{"class":576},[490,2678,807],{"class":583},[490,2680,2646],{"class":576},[490,2682,687],{"class":583},[490,2684,2481],{"class":576},[883,2686,2687,2688,2691,2692,2695],{"color":885,"icon":13},"Call ",[412,2689,2690],{},"drain.flush()"," on server shutdown to ensure all buffered events are sent. See the ",[457,2693,2694],{"href":369},"Pipeline docs"," for all options.",[468,2697,2699],{"id":2698},"tail-sampling","Tail Sampling",[408,2701,1298,2702,2705],{},[412,2703,2704],{},"keep"," to force-retain specific events regardless of head sampling:",[480,2707,2709],{"className":562,"code":2708,"filename":564,"language":565,"meta":486,"style":486},"app.use(evlog({\n  drain: createAxiomDrain(),\n  keep: (ctx) => {\n    if (ctx.duration && ctx.duration > 2000) ctx.shouldKeep = true\n  },\n}))\n",[412,2710,2711,2727,2739,2756,2800,2804],{"__ignoreMap":486},[490,2712,2713,2715,2717,2719,2721,2723,2725],{"class":492,"line":493},[490,2714,725],{"class":576},[490,2716,728],{"class":583},[490,2718,731],{"class":646},[490,2720,650],{"class":576},[490,2722,612],{"class":646},[490,2724,650],{"class":576},[490,2726,653],{"class":583},[490,2728,2729,2731,2733,2735,2737],{"class":492,"line":593},[490,2730,2401],{"class":659},[490,2732,663],{"class":583},[490,2734,2328],{"class":646},[490,2736,2408],{"class":576},[490,2738,1992],{"class":583},[490,2740,2741,2744,2746,2748,2750,2752,2754],{"class":492,"line":617},[490,2742,2743],{"class":646},"  keep",[490,2745,663],{"class":583},[490,2747,768],{"class":583},[490,2749,2422],{"class":771},[490,2751,780],{"class":583},[490,2753,783],{"class":701},[490,2755,786],{"class":583},[490,2757,2758,2761,2763,2765,2767,2770,2773,2776,2778,2780,2783,2786,2788,2790,2792,2795,2797],{"class":492,"line":636},[490,2759,2760],{"class":572},"    if",[490,2762,768],{"class":659},[490,2764,2422],{"class":576},[490,2766,728],{"class":583},[490,2768,2769],{"class":576},"duration",[490,2771,2772],{"class":583}," &&",[490,2774,2775],{"class":576}," ctx",[490,2777,728],{"class":583},[490,2779,2769],{"class":576},[490,2781,2782],{"class":583}," >",[490,2784,2785],{"class":878}," 2000",[490,2787,1186],{"class":659},[490,2789,2422],{"class":576},[490,2791,728],{"class":583},[490,2793,2794],{"class":576},"shouldKeep",[490,2796,969],{"class":583},[490,2798,2799],{"class":846}," true\n",[490,2801,2802],{"class":492,"line":643},[490,2803,2474],{"class":583},[490,2805,2806,2808],{"class":492,"line":656},[490,2807,687],{"class":583},[490,2809,2481],{"class":576},[468,2811,2813],{"id":2812},"route-filtering","Route Filtering",[408,2815,2816,2817,1604,2820,2823],{},"Control which routes are logged with ",[412,2818,2819],{},"include",[412,2821,2822],{},"exclude"," patterns:",[480,2825,2827],{"className":562,"code":2826,"filename":564,"language":565,"meta":486,"style":486},"app.use(evlog({\n  include: ['\u002Fapi\u002F**'],\n  exclude: ['\u002F_internal\u002F**', '\u002Fhealth'],\n  routes: {\n    '\u002Fapi\u002Fauth\u002F**': { service: 'auth-service' },\n    '\u002Fapi\u002Fpayment\u002F**': { service: 'payment-service' },\n  },\n}))\n",[412,2828,2829,2845,2867,2895,2904,2931,2957,2961],{"__ignoreMap":486},[490,2830,2831,2833,2835,2837,2839,2841,2843],{"class":492,"line":493},[490,2832,725],{"class":576},[490,2834,728],{"class":583},[490,2836,731],{"class":646},[490,2838,650],{"class":576},[490,2840,612],{"class":646},[490,2842,650],{"class":576},[490,2844,653],{"class":583},[490,2846,2847,2850,2852,2855,2857,2860,2862,2865],{"class":492,"line":593},[490,2848,2849],{"class":659},"  include",[490,2851,663],{"class":583},[490,2853,2854],{"class":576}," [",[490,2856,678],{"class":583},[490,2858,2859],{"class":499},"\u002Fapi\u002F**",[490,2861,678],{"class":583},[490,2863,2864],{"class":576},"]",[490,2866,1992],{"class":583},[490,2868,2869,2872,2874,2876,2878,2881,2883,2885,2887,2889,2891,2893],{"class":492,"line":617},[490,2870,2871],{"class":659},"  exclude",[490,2873,663],{"class":583},[490,2875,2854],{"class":576},[490,2877,678],{"class":583},[490,2879,2880],{"class":499},"\u002F_internal\u002F**",[490,2882,678],{"class":583},[490,2884,765],{"class":583},[490,2886,584],{"class":583},[490,2888,760],{"class":499},[490,2890,678],{"class":583},[490,2892,2864],{"class":576},[490,2894,1992],{"class":583},[490,2896,2897,2900,2902],{"class":492,"line":636},[490,2898,2899],{"class":659},"  routes",[490,2901,663],{"class":583},[490,2903,786],{"class":583},[490,2905,2906,2909,2912,2914,2916,2918,2920,2922,2924,2927,2929],{"class":492,"line":643},[490,2907,2908],{"class":583},"    '",[490,2910,2911],{"class":659},"\u002Fapi\u002Fauth\u002F**",[490,2913,678],{"class":583},[490,2915,663],{"class":583},[490,2917,598],{"class":583},[490,2919,668],{"class":659},[490,2921,663],{"class":583},[490,2923,584],{"class":583},[490,2925,2926],{"class":499},"auth-service",[490,2928,678],{"class":583},[490,2930,681],{"class":583},[490,2932,2933,2935,2938,2940,2942,2944,2946,2948,2950,2953,2955],{"class":492,"line":656},[490,2934,2908],{"class":583},[490,2936,2937],{"class":659},"\u002Fapi\u002Fpayment\u002F**",[490,2939,678],{"class":583},[490,2941,663],{"class":583},[490,2943,598],{"class":583},[490,2945,668],{"class":659},[490,2947,663],{"class":583},[490,2949,584],{"class":583},[490,2951,2952],{"class":499},"payment-service",[490,2954,678],{"class":583},[490,2956,681],{"class":583},[490,2958,2959],{"class":492,"line":684},[490,2960,2474],{"class":583},[490,2962,2963,2965],{"class":492,"line":693},[490,2964,687],{"class":583},[490,2966,2481],{"class":576},[468,2968,2970],{"id":2969},"client-side-logging","Client-Side Logging",[408,2972,1298,2973,2976],{},[412,2974,2975],{},"evlog\u002Fhttp"," to send structured logs from any frontend to your Express server. This works with any client framework (React, Vue, Svelte, vanilla JS).",[472,2978,2980],{"id":2979},"browser-setup","Browser setup",[480,2982,2985],{"className":562,"code":2983,"filename":2984,"language":565,"meta":486,"style":486},"import { initLogger, log } from 'evlog'\nimport { createHttpLogDrain } from 'evlog\u002Fhttp'\n\nconst drain = createHttpLogDrain({\n  drain: { endpoint: '\u002Fv1\u002Fingest' },\n})\ninitLogger({ drain })\n\nlog.info({ action: 'page_view', path: location.pathname })\n","client.ts",[412,2986,2987,3009,3028,3032,3046,3068,3074,3088,3092],{"__ignoreMap":486},[490,2988,2989,2991,2993,2995,2997,2999,3001,3003,3005,3007],{"class":492,"line":493},[490,2990,573],{"class":572},[490,2992,598],{"class":583},[490,2994,601],{"class":576},[490,2996,765],{"class":583},[490,2998,1367],{"class":576},[490,3000,604],{"class":583},[490,3002,607],{"class":572},[490,3004,584],{"class":583},[490,3006,612],{"class":499},[490,3008,590],{"class":583},[490,3010,3011,3013,3015,3018,3020,3022,3024,3026],{"class":492,"line":593},[490,3012,573],{"class":572},[490,3014,598],{"class":583},[490,3016,3017],{"class":576}," createHttpLogDrain",[490,3019,604],{"class":583},[490,3021,607],{"class":572},[490,3023,584],{"class":583},[490,3025,2975],{"class":499},[490,3027,590],{"class":583},[490,3029,3030],{"class":492,"line":617},[490,3031,640],{"emptyLinePlaceholder":639},[490,3033,3034,3036,3038,3040,3042,3044],{"class":492,"line":636},[490,3035,702],{"class":701},[490,3037,2646],{"class":576},[490,3039,708],{"class":583},[490,3041,3017],{"class":646},[490,3043,650],{"class":576},[490,3045,653],{"class":583},[490,3047,3048,3050,3052,3054,3057,3059,3061,3064,3066],{"class":492,"line":643},[490,3049,2401],{"class":659},[490,3051,663],{"class":583},[490,3053,598],{"class":583},[490,3055,3056],{"class":659}," endpoint",[490,3058,663],{"class":583},[490,3060,584],{"class":583},[490,3062,3063],{"class":499},"\u002Fv1\u002Fingest",[490,3065,678],{"class":583},[490,3067,681],{"class":583},[490,3069,3070,3072],{"class":492,"line":656},[490,3071,687],{"class":583},[490,3073,690],{"class":576},[490,3075,3076,3078,3080,3082,3084,3086],{"class":492,"line":684},[490,3077,647],{"class":646},[490,3079,650],{"class":576},[490,3081,807],{"class":583},[490,3083,2646],{"class":576},[490,3085,687],{"class":583},[490,3087,690],{"class":576},[490,3089,3090],{"class":492,"line":693},[490,3091,640],{"emptyLinePlaceholder":639},[490,3093,3094,3096,3098,3100,3102,3104,3107,3109,3111,3114,3116,3118,3121,3123,3126,3128,3131,3133],{"class":492,"line":698},[490,3095,797],{"class":576},[490,3097,728],{"class":583},[490,3099,885],{"class":646},[490,3101,650],{"class":576},[490,3103,807],{"class":583},[490,3105,3106],{"class":659}," action",[490,3108,663],{"class":583},[490,3110,584],{"class":583},[490,3112,3113],{"class":499},"page_view",[490,3115,678],{"class":583},[490,3117,765],{"class":583},[490,3119,3120],{"class":659}," path",[490,3122,663],{"class":583},[490,3124,3125],{"class":576}," location",[490,3127,728],{"class":583},[490,3129,3130],{"class":576},"pathname ",[490,3132,687],{"class":583},[490,3134,690],{"class":576},[472,3136,3138],{"id":3137},"ingest-endpoint","Ingest endpoint",[408,3140,3141,3142,3145],{},"Add a POST route to receive batched ",[412,3143,3144],{},"DrainContext[]"," from the browser:",[480,3147,3149],{"className":562,"code":3148,"filename":564,"language":565,"meta":486,"style":486},"import type { DrainContext } from 'evlog'\n\napp.post('\u002Fv1\u002Fingest', express.json(), (req, res) => {\n  const batch = req.body as DrainContext[]\n  for (const ctx of batch) {\n    console.log('[BROWSER]', JSON.stringify(ctx.event))\n  }\n  res.sendStatus(204)\n})\n",[412,3150,3151,3171,3175,3217,3241,3261,3299,3304,3320],{"__ignoreMap":486},[490,3152,3153,3155,3157,3159,3161,3163,3165,3167,3169],{"class":492,"line":493},[490,3154,573],{"class":572},[490,3156,2504],{"class":572},[490,3158,598],{"class":583},[490,3160,2509],{"class":576},[490,3162,604],{"class":583},[490,3164,607],{"class":572},[490,3166,584],{"class":583},[490,3168,612],{"class":499},[490,3170,590],{"class":583},[490,3172,3173],{"class":492,"line":593},[490,3174,640],{"emptyLinePlaceholder":639},[490,3176,3177,3179,3181,3183,3185,3187,3189,3191,3193,3195,3197,3199,3201,3203,3205,3207,3209,3211,3213,3215],{"class":492,"line":617},[490,3178,725],{"class":576},[490,3180,728],{"class":583},[490,3182,1714],{"class":646},[490,3184,650],{"class":576},[490,3186,678],{"class":583},[490,3188,3063],{"class":499},[490,3190,678],{"class":583},[490,3192,765],{"class":583},[490,3194,711],{"class":576},[490,3196,728],{"class":583},[490,3198,834],{"class":646},[490,3200,2408],{"class":576},[490,3202,765],{"class":583},[490,3204,768],{"class":583},[490,3206,772],{"class":771},[490,3208,765],{"class":583},[490,3210,777],{"class":771},[490,3212,780],{"class":583},[490,3214,783],{"class":701},[490,3216,786],{"class":583},[490,3218,3219,3221,3224,3226,3228,3230,3233,3236,3238],{"class":492,"line":636},[490,3220,963],{"class":701},[490,3222,3223],{"class":576}," batch",[490,3225,969],{"class":583},[490,3227,972],{"class":576},[490,3229,728],{"class":583},[490,3231,3232],{"class":576},"body",[490,3234,3235],{"class":572}," as",[490,3237,2509],{"class":496},[490,3239,3240],{"class":659},"[]\n",[490,3242,3243,3246,3248,3250,3252,3255,3257,3259],{"class":492,"line":643},[490,3244,3245],{"class":572},"  for",[490,3247,768],{"class":659},[490,3249,702],{"class":701},[490,3251,2775],{"class":576},[490,3253,3254],{"class":583}," of",[490,3256,3223],{"class":576},[490,3258,1186],{"class":659},[490,3260,653],{"class":583},[490,3262,3263,3266,3268,3270,3272,3274,3277,3279,3281,3284,3286,3289,3291,3293,3295,3297],{"class":492,"line":656},[490,3264,3265],{"class":576},"    console",[490,3267,728],{"class":583},[490,3269,797],{"class":646},[490,3271,650],{"class":659},[490,3273,678],{"class":583},[490,3275,3276],{"class":499},"[BROWSER]",[490,3278,678],{"class":583},[490,3280,765],{"class":583},[490,3282,3283],{"class":576}," JSON",[490,3285,728],{"class":583},[490,3287,3288],{"class":646},"stringify",[490,3290,650],{"class":659},[490,3292,2422],{"class":576},[490,3294,728],{"class":583},[490,3296,2449],{"class":576},[490,3298,2481],{"class":659},[490,3300,3301],{"class":492,"line":684},[490,3302,3303],{"class":583},"  }\n",[490,3305,3306,3308,3310,3313,3315,3318],{"class":492,"line":693},[490,3307,829],{"class":576},[490,3309,728],{"class":583},[490,3311,3312],{"class":646},"sendStatus",[490,3314,650],{"class":659},[490,3316,3317],{"class":878},"204",[490,3319,690],{"class":659},[490,3321,3322,3324],{"class":492,"line":698},[490,3323,687],{"class":583},[490,3325,690],{"class":576},[883,3327,3329,3330,3333],{"color":3328,"icon":376},"neutral","See the full ",[457,3331,3332],{"href":374},"HTTP drain"," adapter docs for batching, retry, sendBeacon fallback, and authentication options.",[468,3335,3337],{"id":3336},"run-locally","Run Locally",[480,3339,3342],{"className":482,"code":3340,"filename":3341,"language":485,"meta":486,"style":486},"git clone https:\u002F\u002Fgithub.com\u002Fhugorcd\u002Fevlog.git\ncd evlog\npnpm install\npnpm run example:express\n","Terminal",[412,3343,3344,3355,3363,3370],{"__ignoreMap":486},[490,3345,3346,3349,3352],{"class":492,"line":493},[490,3347,3348],{"class":496},"git",[490,3350,3351],{"class":499}," clone",[490,3353,3354],{"class":499}," https:\u002F\u002Fgithub.com\u002Fhugorcd\u002Fevlog.git\n",[490,3356,3357,3360],{"class":492,"line":593},[490,3358,3359],{"class":646},"cd",[490,3361,3362],{"class":499}," evlog\n",[490,3364,3365,3367],{"class":492,"line":617},[490,3366,484],{"class":496},[490,3368,3369],{"class":499}," install\n",[490,3371,3372,3374,3377],{"class":492,"line":636},[490,3373,484],{"class":496},[490,3375,3376],{"class":499}," run",[490,3378,3379],{"class":499}," example:express\n",[408,3381,3382,3383,3387],{},"Open ",[457,3384,3385],{"href":3385,"rel":3386},"http:\u002F\u002Flocalhost:3000",[461]," to explore the interactive test UI.",[3389,3390,3391],"card-group",{},[3392,3393,3397],"card",{"icon":3394,"title":3395,"to":3396},"i-simple-icons-github","Source Code","https:\u002F\u002Fgithub.com\u002Fhugorcd\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Fexpress","Browse the complete Express example source on GitHub.",[468,3399,3401],{"id":3400},"next-steps","Next Steps",[408,3403,3404,3405,3407],{},"Deepen your ",[887,3406,241],{}," integration:",[429,3409,3410,3415,3420,3425],{},[432,3411,3412,3414],{},[457,3413,51],{"href":52},": Design comprehensive events with context layering",[432,3416,3417,3419],{},[457,3418,300],{"href":305},": Send logs to Axiom, Sentry, PostHog, and more",[432,3421,3422,3424],{},[457,3423,175],{"href":176},": Control log volume with head and tail sampling",[432,3426,3427,3429,3430,1898,3432,1902,3434,3436],{},[457,3428,56],{"href":57},": Throw errors with ",[412,3431,1897],{},[412,3433,1901],{},[412,3435,1905],{}," fields",[3438,3439,3440],"style",{},"html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}",{"title":486,"searchDepth":593,"depth":593,"links":3442},[3443,3447,3448,3449,3451,3452,3453,3456,3457,3458,3462,3463],{"id":470,"depth":593,"text":20,"children":3444},[3445,3446],{"id":474,"depth":617,"text":475},{"id":558,"depth":617,"text":559},{"id":914,"depth":593,"text":51},{"id":1294,"depth":593,"text":1295},{"id":1617,"depth":593,"text":3450},"Background work (log.fork)",{"id":1887,"depth":593,"text":1888},{"id":2297,"depth":593,"text":170},{"id":2310,"depth":593,"text":2311,"children":3454},[3455],{"id":2484,"depth":617,"text":2485},{"id":2698,"depth":593,"text":2699},{"id":2812,"depth":593,"text":2813},{"id":2969,"depth":593,"text":2970,"children":3459},[3460,3461],{"id":2979,"depth":617,"text":2980},{"id":3137,"depth":617,"text":3138},{"id":3336,"depth":593,"text":3337},{"id":3400,"depth":593,"text":3401},"Automatic wide events, structured errors, drain adapters, enrichers, and tail sampling in Express applications.","md",[3467],{"label":3395,"icon":3394,"to":3396,"color":3328,"variant":3468},"subtle",{},{"title":241,"icon":244},{"title":241,"description":3464},"AzRM2_oQWeCb6loD6kK-beUD1RMsa2FH-avuz6IhY98",[3474,3476],{"title":236,"path":237,"stem":238,"description":3475,"icon":239,"children":-1},"Automatic wide events, structured errors, drain adapters, enrichers, and tail sampling in NestJS applications.",{"title":246,"path":247,"stem":248,"description":3477,"icon":249,"children":-1},"Automatic wide events, structured errors, drain adapters, enrichers, and tail sampling in Hono applications.",1778325964919]