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OpenTelemetry","\u002Fcompare\u002Fopentelemetry","8.compare\u002F2.opentelemetry",{"title":591,"path":592,"stem":593,"icon":567},"evlog vs LogTape","\u002Fcompare\u002Flogtape","8.compare\u002F3.logtape",{"title":595,"path":596,"stem":597,"icon":567},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","8.compare\u002F4.winston",{"title":599,"path":600,"stem":601,"icon":567},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","8.compare\u002F5.consola",{"id":603,"title":415,"body":604,"description":4421,"extension":4422,"links":4423,"meta":4424,"navigation":4425,"path":508,"seo":4426,"stem":509,"__hash__":4427},"docs\u002F6.extend\u002F3.consumer-recipes.md",{"type":605,"value":606,"toc":4408},"minimark",[607,620,695,700,721,726,1728,1735,1739,2349,2353,2719,2727,2731,2736,2790,2793,2897,2910,2914,2917,3337,3346,3350,3356,3854,3858,3861,4205,4209,4212,4371,4374,4378,4398,4405],[608,609,610,611,615,616,619],"p",{},"Real-world patterns that combine the ",[612,613,614],"a",{"href":490},"in-process bus and stream server"," with the ",[612,617,618],{"href":504},"filesystem reader",".",[621,622,625,628,687],"prompt",{":actions":623,"description":624,"icon":510},"[\"copy\",\"cursor\",\"claude\"]","Build a custom evlog devtool \u002F dashboard",[608,626,627],{},"Bootstrap a local devtool or dashboard that consumes evlog wide events.",[629,630,631,644,655,674,681,684],"ul",{},[632,633,634,635,639,640,643],"li",{},"Pick the source: live (stream server over SSE) or history (",[636,637,638],"code",{},"readFsLogs"," from ",[636,641,642],{},".evlog\u002Flogs",") or both (replay then live tail)",[632,645,646,647,650,651,654],{},"For SSE: discover the URL via ",[636,648,649],{},".evlog\u002Fstream.url"," or ",[636,652,653],{},"GET \u002Fapi\u002F_evlog\u002Fstream-info",", never hard-code the port",[632,656,657,658,661,662,665,666,669,670,673],{},"Open an ",[636,659,660],{},"EventSource"," and decode messages as ",[636,663,664],{},"{ evlog: '1', type, data }"," envelopes (",[636,667,668],{},"type"," is ",[636,671,672],{},"hello | event | replay | ping",")",[632,675,676,677,680],{},"For browser tabs running on a different origin from the dev server, configure CORS via the stream server ",[636,678,679],{},"cors"," option and forward credentials carefully",[632,682,683],{},"Aggregate on the consumer side (counts, latency histograms, error groups), and keep the server simple",[632,685,686],{},"Skip on serverless platforms. The stream is in-process",[608,688,689,690],{},"Docs: ",[612,691,692],{"href":692,"rel":693},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fconsumer-recipes",[694],"nofollow",[696,697,699],"h2",{"id":698},"_1-build-a-minimal-devtool","1. Build a minimal devtool",[608,701,702,703,705,706,708,709,712,713,715,716,720],{},"A live event panel is essentially ",[636,704,660],{}," + a list. The full wire format and discovery rules (",[636,707,649],{},", ",[636,710,711],{},"\u002Fapi\u002F_evlog\u002Fstream-info",", the ",[636,714,664],{}," envelope, and auth) are documented on the ",[612,717,719],{"href":718},"\u002Fextend\u002Fstream#wire-format","stream page",". Each recipe below assumes you've grabbed the URL via either of those mechanisms.",[722,723,725],"h3",{"id":724},"vanilla-html-js-drop-into-any-page","Vanilla HTML + JS (drop into any page)",[727,728,729],"code-collapse",{},[730,731,736],"pre",{"className":732,"code":733,"language":734,"meta":735,"style":735},"language-html shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","\u003C!doctype html>\n\u003Chtml>\n\u003Chead>\n \u003Cmeta charset=\"utf-8\">\n \u003Ctitle>evlog mini devtool\u003C\u002Ftitle>\n \u003Cstyle>\n body { font: 13px ui-sans-serif, system-ui; margin: 0; padding: 0; }\n table { width: 100%; border-collapse: collapse; }\n td, th { padding: 6px 10px; border-bottom: 1px solid #eee; text-align: left; }\n .lvl-error { color: #ef4444 }\n .lvl-warn { color: #f59e0b }\n .lvl-info { color: #3b82f6 }\n \u003C\u002Fstyle>\n\u003C\u002Fhead>\n\u003Cbody>\n \u003Ctable id=\"t\">\n \u003Cthead>\u003Ctr>\u003Cth>time\u003C\u002Fth>\u003Cth>level\u003C\u002Fth>\u003Cth>service\u003C\u002Fth>\u003Cth>action\u003C\u002Fth>\u003C\u002Ftr>\u003C\u002Fthead>\n \u003Ctbody>\u003C\u002Ftbody>\n \u003C\u002Ftable>\n\n \u003Cscript>\n \u002F\u002F Replace with the URL printed at startup, or fetch it from \u002Fapi\u002F_evlog\u002Fstream-info\n const STREAM_URL = 'http:\u002F\u002F127.0.0.1:51203'\n const tbody = document.querySelector('#t tbody')\n const es = new EventSource(STREAM_URL)\n\n es.onmessage = (e) => {\n const env = JSON.parse(e.data)\n if (env.evlog !== '1') return\n if (env.type !== 'event' && env.type !== 'replay') return\n\n const w = env.data\n const tr = document.createElement('tr')\n tr.innerHTML = `\n \u003Ctd>${new Date(w.timestamp).toLocaleTimeString()}\u003C\u002Ftd>\n \u003Ctd class=\"lvl-${w.level}\">${w.level}\u003C\u002Ftd>\n \u003Ctd>${w.service ?? 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}\n",[739,2179,2180,2182],{"class":741,"line":1217},[739,2181,1533],{"class":745},[739,2183,1274],{"class":817},[739,2185,2186],{"class":741,"line":1224},[739,2187,1204],{"emptyLinePlaceholder":1203},[739,2189,2190,2193,2195,2197,2199,2201,2204,2207],{"class":741,"line":1244},[739,2191,2192],{"class":1259},"onBeforeUnmount",[739,2194,1263],{"class":817},[739,2196,1530],{"class":745},[739,2198,1324],{"class":753},[739,2200,1861],{"class":817},[739,2202,2203],{"class":745},"?.",[739,2205,2206],{"class":1259},"close",[739,2208,2209],{"class":817},"())\n",[739,2211,2212,2214,2216],{"class":741,"line":1277},[739,2213,821],{"class":745},[739,2215,1212],{"class":749},[739,2217,757],{"class":745},[739,2219,2220],{"class":741,"line":1296},[739,2221,1204],{"emptyLinePlaceholder":1203},[739,2223,2224,2226,2229],{"class":741,"line":1301},[739,2225,763],{"class":745},[739,2227,2228],{"class":749},"template",[739,2230,757],{"class":745},[739,2232,2233,2235,2237],{"class":741,"line":1330},[739,2234,783],{"class":745},[739,2236,629],{"class":749},[739,2238,757],{"class":745},[739,2240,2241,2243,2245,2248,2250,2252,2255,2257,2260,2262,2264,2267,2269],{"class":741,"line":1360},[739,2242,1101],{"class":745},[739,2244,632],{"class":749},[739,2246,2247],{"class":753}," v-for",[739,2249,792],{"class":745},[739,2251,795],{"class":745},[739,2253,2254],{"class":798},"(e, i) in events",[739,2256,795],{"class":745},[739,2258,2259],{"class":753}," :key",[739,2261,792],{"class":745},[739,2263,795],{"class":745},[739,2265,2266],{"class":798},"`${e.timestamp}-${i}`",[739,2268,795],{"class":745},[739,2270,757],{"class":745},[739,2272,2273,2276,2278,2280,2283,2285,2287],{"class":741,"line":1393},[739,2274,2275],{"class":745}," \u003C",[739,2277,636],{"class":749},[739,2279,814],{"class":745},[739,2281,2282],{"class":817},"{{ e.level }}",[739,2284,821],{"class":745},[739,2286,636],{"class":749},[739,2288,757],{"class":745},[739,2290,2291,2293,2296,2298,2301,2303,2305],{"class":741,"line":1437},[739,2292,2275],{"class":745},[739,2294,2295],{"class":749},"strong",[739,2297,814],{"class":745},[739,2299,2300],{"class":817},"{{ e.service }}",[739,2302,821],{"class":745},[739,2304,2295],{"class":749},[739,2306,757],{"class":745},[739,2308,2309,2311,2313,2315,2318,2320,2322],{"class":741,"line":1442},[739,2310,2275],{"class":745},[739,2312,739],{"class":749},[739,2314,814],{"class":745},[739,2316,2317],{"class":817},"{{ e.action ?? e.message ?? e.path }}",[739,2319,821],{"class":745},[739,2321,739],{"class":749},[739,2323,757],{"class":745},[739,2325,2326,2329,2331],{"class":741,"line":1459},[739,2327,2328],{"class":745}," \u003C\u002F",[739,2330,632],{"class":749},[739,2332,757],{"class":745},[739,2334,2335,2337,2339],{"class":741,"line":1486},[739,2336,1050],{"class":745},[739,2338,629],{"class":749},[739,2340,757],{"class":745},[739,2342,2343,2345,2347],{"class":741,"line":1502},[739,2344,821],{"class":745},[739,2346,2228],{"class":749},[739,2348,757],{"class":745},[722,2350,2352],{"id":2351},"react-hook","React hook",[730,2354,2357],{"className":2355,"code":2356,"language":1766,"meta":735,"style":735},"language-ts shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { useEffect, useState } from 'react'\nimport type { WideEvent } from 'evlog'\n\nexport function useEvlogStream(url: string) {\n const [events, setEvents] = useState\u003CWideEvent[]>([])\n\n useEffect(() => {\n if (!url) return\n const es = new EventSource(url)\n es.onmessage = (e) => {\n const env = JSON.parse(e.data)\n if (env.evlog !== '1') return\n if (env.type === 'event' || env.type === 'replay') {\n setEvents(prev => [env.data, ...prev].slice(0, 500))\n }\n }\n return () => es.close()\n }, [url])\n\n return events\n}\n",[636,2358,2359,2384,2404,2408,2431,2462,2466,2479,2493,2511,2531,2555,2579,2619,2665,2670,2674,2691,2703,2707,2715],{"__ignoreMap":735},[739,2360,2361,2363,2365,2368,2370,2373,2375,2377,2379,2382],{"class":741,"line":742},[739,2362,1775],{"class":1363},[739,2364,845],{"class":745},[739,2366,2367],{"class":817}," useEffect",[739,2369,862],{"class":745},[739,2371,2372],{"class":817}," useState",[739,2374,1793],{"class":745},[739,2376,1796],{"class":1363},[739,2378,1235],{"class":745},[739,2380,2381],{"class":798},"react",[739,2383,1241],{"class":745},[739,2385,2386,2388,2390,2392,2394,2396,2398,2400,2402],{"class":741,"line":760},[739,2387,1775],{"class":1363},[739,2389,1809],{"class":1363},[739,2391,845],{"class":745},[739,2393,1814],{"class":817},[739,2395,1793],{"class":745},[739,2397,1796],{"class":1363},[739,2399,1235],{"class":745},[739,2401,1374],{"class":798},[739,2403,1241],{"class":745},[739,2405,2406],{"class":741,"line":770},[739,2407,1204],{"emptyLinePlaceholder":1203},[739,2409,2410,2413,2416,2419,2421,2423,2425,2427,2429],{"class":741,"line":780},[739,2411,2412],{"class":1363},"export",[739,2414,2415],{"class":753}," function",[739,2417,2418],{"class":1259}," useEvlogStream",[739,2420,1263],{"class":745},[739,2422,1962],{"class":1318},[739,2424,852],{"class":745},[739,2426,1932],{"class":841},[739,2428,673],{"class":745},[739,2430,1327],{"class":745},[739,2432,2433,2435,2438,2440,2442,2445,2448,2450,2452,2454,2456,2458,2460],{"class":741,"line":806},[739,2434,1907],{"class":753},[739,2436,2437],{"class":745}," [",[739,2439,2138],{"class":817},[739,2441,862],{"class":745},[739,2443,2444],{"class":817}," setEvents",[739,2446,2447],{"class":745},"]",[739,2449,1312],{"class":745},[739,2451,2372],{"class":1259},[739,2453,763],{"class":745},[739,2455,1845],{"class":841},[739,2457,1848],{"class":749},[739,2459,814],{"class":745},[739,2461,1853],{"class":749},[739,2463,2464],{"class":741,"line":828},[739,2465,1204],{"emptyLinePlaceholder":1203},[739,2467,2468,2471,2473,2475,2477],{"class":741,"line":838},[739,2469,2470],{"class":1259}," useEffect",[739,2472,1263],{"class":749},[739,2474,1530],{"class":745},[739,2476,1324],{"class":753},[739,2478,1327],{"class":745},[739,2480,2481,2483,2485,2487,2489,2491],{"class":741,"line":893},[739,2482,2036],{"class":1363},[739,2484,1315],{"class":749},[739,2486,1959],{"class":745},[739,2488,1962],{"class":817},[739,2490,1387],{"class":749},[739,2492,1390],{"class":1363},[739,2494,2495,2497,2499,2501,2503,2505,2507,2509],{"class":741,"line":923},[739,2496,1227],{"class":753},[739,2498,1861],{"class":817},[739,2500,1312],{"class":745},[739,2502,1287],{"class":745},[739,2504,1290],{"class":1259},[739,2506,1263],{"class":749},[739,2508,1962],{"class":817},[739,2510,1274],{"class":749},[739,2512,2513,2515,2517,2519,2521,2523,2525,2527,2529],{"class":741,"line":979},[739,2514,1304],{"class":817},[739,2516,619],{"class":745},[739,2518,1309],{"class":1259},[739,2520,1312],{"class":745},[739,2522,1315],{"class":745},[739,2524,1319],{"class":1318},[739,2526,673],{"class":745},[739,2528,1324],{"class":753},[739,2530,1327],{"class":745},[739,2532,2533,2535,2537,2539,2541,2543,2545,2547,2549,2551,2553],{"class":741,"line":1004},[739,2534,1333],{"class":753},[739,2536,1336],{"class":817},[739,2538,1312],{"class":745},[739,2540,1341],{"class":817},[739,2542,619],{"class":745},[739,2544,1346],{"class":1259},[739,2546,1263],{"class":749},[739,2548,1319],{"class":817},[739,2550,619],{"class":745},[739,2552,1355],{"class":817},[739,2554,1274],{"class":749},[739,2556,2557,2559,2561,2563,2565,2567,2569,2571,2573,2575,2577],{"class":741,"line":1026},[739,2558,1364],{"class":1363},[739,2560,1315],{"class":749},[739,2562,1369],{"class":817},[739,2564,619],{"class":745},[739,2566,1374],{"class":817},[739,2568,1377],{"class":745},[739,2570,1235],{"class":745},[739,2572,1382],{"class":798},[739,2574,1266],{"class":745},[739,2576,1387],{"class":749},[739,2578,1390],{"class":1363},[739,2580,2581,2583,2585,2587,2589,2591,2593,2595,2597,2599,2601,2603,2605,2607,2609,2611,2613,2615,2617],{"class":741,"line":1047},[739,2582,1364],{"class":1363},[739,2584,1315],{"class":749},[739,2586,1369],{"class":817},[739,2588,619],{"class":745},[739,2590,668],{"class":817},[739,2592,2071],{"class":745},[739,2594,1235],{"class":745},[739,2596,1410],{"class":798},[739,2598,1266],{"class":745},[739,2600,2080],{"class":745},[739,2602,1336],{"class":817},[739,2604,619],{"class":745},[739,2606,668],{"class":817},[739,2608,2071],{"class":745},[739,2610,1235],{"class":745},[739,2612,1428],{"class":798},[739,2614,1266],{"class":745},[739,2616,1387],{"class":749},[739,2618,2099],{"class":745},[739,2620,2621,2624,2626,2629,2631,2633,2635,2637,2639,2641,2644,2646,2648,2650,2653,2655,2658,2660,2662],{"class":741,"line":1057},[739,2622,2623],{"class":1259}," setEvents",[739,2625,1263],{"class":749},[739,2627,2628],{"class":1318},"prev",[739,2630,1324],{"class":753},[739,2632,2437],{"class":749},[739,2634,1369],{"class":817},[739,2636,619],{"class":745},[739,2638,1355],{"class":817},[739,2640,862],{"class":745},[739,2642,2643],{"class":745}," ...",[739,2645,2628],{"class":817},[739,2647,2447],{"class":749},[739,2649,619],{"class":745},[739,2651,2652],{"class":1259},"slice",[739,2654,1263],{"class":749},[739,2656,2657],{"class":855},"0",[739,2659,862],{"class":745},[739,2661,2151],{"class":855},[739,2663,2664],{"class":749},"))\n",[739,2666,2667],{"class":741,"line":1066},[739,2668,2669],{"class":745}," }\n",[739,2671,2672],{"class":741,"line":1076},[739,2673,1700],{"class":745},[739,2675,2676,2679,2681,2683,2685,2687,2689],{"class":741,"line":1098},[739,2677,2678],{"class":1363}," return",[739,2680,1893],{"class":745},[739,2682,1324],{"class":753},[739,2684,1861],{"class":817},[739,2686,619],{"class":745},[739,2688,2206],{"class":1259},[739,2690,1694],{"class":749},[739,2692,2693,2696,2698,2700],{"class":741,"line":1177},[739,2694,2695],{"class":745}," },",[739,2697,2437],{"class":749},[739,2699,1962],{"class":817},[739,2701,2702],{"class":749},"])\n",[739,2704,2705],{"class":741,"line":1191},[739,2706,1204],{"emptyLinePlaceholder":1203},[739,2708,2709,2712],{"class":741,"line":1200},[739,2710,2711],{"class":1363}," return",[739,2713,2714],{"class":817}," events\n",[739,2716,2717],{"class":741,"line":1207},[739,2718,1001],{"class":745},[608,2720,2721,2722,2724,2725,619],{},"That's the entire integration surface. No SDK, no special types beyond ",[636,2723,1845],{}," exported from ",[636,2726,1374],{},[696,2728,2730],{"id":2729},"_2-quick-cli-inspection-with-curl-jq","2. Quick CLI inspection with curl + jq",[608,2732,2733,2734,852],{},"The URL is in ",[636,2735,649],{},[730,2737,2741],{"className":2738,"code":2739,"language":2740,"meta":735,"style":735},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","URL=$(cat .evlog\u002Fstream.url)\ncurl -N \"$URL\" | jq -c 'select(.type == \"event\") | .data'\n","bash",[636,2742,2743,2759],{"__ignoreMap":735},[739,2744,2745,2748,2751,2754,2757],{"class":741,"line":742},[739,2746,2747],{"class":817},"URL",[739,2749,2750],{"class":745},"=$(",[739,2752,2753],{"class":841},"cat",[739,2755,2756],{"class":798}," .evlog\u002Fstream.url",[739,2758,1274],{"class":745},[739,2760,2761,2764,2767,2770,2773,2775,2777,2780,2783,2785,2788],{"class":741,"line":760},[739,2762,2763],{"class":841},"curl",[739,2765,2766],{"class":798}," -N",[739,2768,2769],{"class":745}," \"",[739,2771,2772],{"class":817},"$URL",[739,2774,795],{"class":745},[739,2776,1868],{"class":745},[739,2778,2779],{"class":841}," jq",[739,2781,2782],{"class":798}," -c",[739,2784,1235],{"class":745},[739,2786,2787],{"class":798},"select(.type == \"event\") | .data",[739,2789,1241],{"class":745},[608,2791,2792],{},"Filter on the client side as needed:",[730,2794,2796],{"className":2738,"code":2795,"language":2740,"meta":735,"style":735},"# Only errors\ncurl -sN \"$URL\" | jq -c 'select(.type == \"event\" and .data.level == \"error\") | .data'\n\n# Only one service\ncurl -sN \"$URL\" | jq -c 'select(.type == \"event\" and .data.service == \"checkout\") | .data'\n\n# Slow requests\ncurl -sN \"$URL\" | jq -c 'select(.type == \"event\" and .data.durationMs > 500) | .data'\n",[636,2797,2798,2803,2829,2833,2838,2863,2867,2872],{"__ignoreMap":735},[739,2799,2800],{"class":741,"line":742},[739,2801,2802],{"class":1220},"# Only errors\n",[739,2804,2805,2807,2810,2812,2814,2816,2818,2820,2822,2824,2827],{"class":741,"line":760},[739,2806,2763],{"class":841},[739,2808,2809],{"class":798}," -sN",[739,2811,2769],{"class":745},[739,2813,2772],{"class":817},[739,2815,795],{"class":745},[739,2817,1868],{"class":745},[739,2819,2779],{"class":841},[739,2821,2782],{"class":798},[739,2823,1235],{"class":745},[739,2825,2826],{"class":798},"select(.type == \"event\" and .data.level == \"error\") | .data",[739,2828,1241],{"class":745},[739,2830,2831],{"class":741,"line":770},[739,2832,1204],{"emptyLinePlaceholder":1203},[739,2834,2835],{"class":741,"line":780},[739,2836,2837],{"class":1220},"# Only one service\n",[739,2839,2840,2842,2844,2846,2848,2850,2852,2854,2856,2858,2861],{"class":741,"line":806},[739,2841,2763],{"class":841},[739,2843,2809],{"class":798},[739,2845,2769],{"class":745},[739,2847,2772],{"class":817},[739,2849,795],{"class":745},[739,2851,1868],{"class":745},[739,2853,2779],{"class":841},[739,2855,2782],{"class":798},[739,2857,1235],{"class":745},[739,2859,2860],{"class":798},"select(.type == \"event\" and .data.service == \"checkout\") | .data",[739,2862,1241],{"class":745},[739,2864,2865],{"class":741,"line":828},[739,2866,1204],{"emptyLinePlaceholder":1203},[739,2868,2869],{"class":741,"line":838},[739,2870,2871],{"class":1220},"# Slow requests\n",[739,2873,2874,2876,2878,2880,2882,2884,2886,2888,2890,2892,2895],{"class":741,"line":893},[739,2875,2763],{"class":841},[739,2877,2809],{"class":798},[739,2879,2769],{"class":745},[739,2881,2772],{"class":817},[739,2883,795],{"class":745},[739,2885,1868],{"class":745},[739,2887,2779],{"class":841},[739,2889,2782],{"class":798},[739,2891,1235],{"class":745},[739,2893,2894],{"class":798},"select(.type == \"event\" and .data.durationMs > 500) | .data",[739,2896,1241],{"class":745},[608,2898,2899,2902,2903,2905,2906,2909],{},[636,2900,2901],{},"-N"," keeps ",[636,2904,2763],{}," in streaming mode (no buffering). ",[636,2907,2908],{},"-s"," is silent.",[696,2911,2913],{"id":2912},"_3-replay-history-then-go-live","3. Replay history then go live",[608,2915,2916],{},"History on disk (filesystem drain) + live updates from the stream server = a full picture from any point in time.",[730,2918,2920],{"className":2355,"code":2919,"language":1766,"meta":735,"style":735},"import { readFsLogs } from 'evlog\u002Ffs'\nimport { readFile } from 'node:fs\u002Fpromises'\nimport type { WideEvent } from 'evlog'\n\nasync function bootstrap(handle: (e: WideEvent) => void) {\n \u002F\u002F 1. Replay the last hour from `.evlog\u002Flogs\u002F`\n const since = new Date(Date.now() - 60 * 60 * 1000)\n for await (const event of readFsLogs({ since })) {\n handle(event)\n }\n\n \u002F\u002F 2. Switch to the live SSE stream\n const url = (await readFile('.evlog\u002Fstream.url', 'utf-8')).trim()\n const es = new EventSource(url)\n es.onmessage = (e) => {\n const env = JSON.parse(e.data)\n if (env.evlog !== '1') return\n if (env.type === 'event' || env.type === 'replay') {\n handle(env.data)\n }\n }\n return () => es.close()\n}\n",[636,2921,2922,2942,2962,2982,2986,3021,3026,3070,3103,3114,3118,3122,3127,3168,3186,3206,3230,3254,3294,3309,3313,3317,3333],{"__ignoreMap":735},[739,2923,2924,2926,2928,2931,2933,2935,2937,2940],{"class":741,"line":742},[739,2925,1775],{"class":1363},[739,2927,845],{"class":745},[739,2929,2930],{"class":817}," readFsLogs",[739,2932,1793],{"class":745},[739,2934,1796],{"class":1363},[739,2936,1235],{"class":745},[739,2938,2939],{"class":798},"evlog\u002Ffs",[739,2941,1241],{"class":745},[739,2943,2944,2946,2948,2951,2953,2955,2957,2960],{"class":741,"line":760},[739,2945,1775],{"class":1363},[739,2947,845],{"class":745},[739,2949,2950],{"class":817}," readFile",[739,2952,1793],{"class":745},[739,2954,1796],{"class":1363},[739,2956,1235],{"class":745},[739,2958,2959],{"class":798},"node:fs\u002Fpromises",[739,2961,1241],{"class":745},[739,2963,2964,2966,2968,2970,2972,2974,2976,2978,2980],{"class":741,"line":770},[739,2965,1775],{"class":1363},[739,2967,1809],{"class":1363},[739,2969,845],{"class":745},[739,2971,1814],{"class":817},[739,2973,1793],{"class":745},[739,2975,1796],{"class":1363},[739,2977,1235],{"class":745},[739,2979,1374],{"class":798},[739,2981,1241],{"class":745},[739,2983,2984],{"class":741,"line":780},[739,2985,1204],{"emptyLinePlaceholder":1203},[739,2987,2988,2990,2992,2995,2997,3000,3002,3004,3006,3008,3010,3012,3014,3017,3019],{"class":741,"line":806},[739,2989,1890],{"class":753},[739,2991,2415],{"class":753},[739,2993,2994],{"class":1259}," bootstrap",[739,2996,1263],{"class":745},[739,2998,2999],{"class":1259},"handle",[739,3001,852],{"class":745},[739,3003,1315],{"class":745},[739,3005,1319],{"class":1318},[739,3007,852],{"class":745},[739,3009,1814],{"class":841},[739,3011,673],{"class":745},[739,3013,1324],{"class":753},[739,3015,3016],{"class":841}," void",[739,3018,673],{"class":745},[739,3020,1327],{"class":745},[739,3022,3023],{"class":741,"line":828},[739,3024,3025],{"class":1220}," \u002F\u002F 1. Replay the last hour from `.evlog\u002Flogs\u002F`\n",[739,3027,3028,3030,3033,3035,3037,3039,3041,3044,3046,3049,3052,3055,3058,3061,3063,3065,3068],{"class":741,"line":838},[739,3029,1907],{"class":753},[739,3031,3032],{"class":817}," since",[739,3034,1312],{"class":745},[739,3036,1287],{"class":745},[739,3038,1514],{"class":1259},[739,3040,1263],{"class":749},[739,3042,3043],{"class":817},"Date",[739,3045,619],{"class":745},[739,3047,3048],{"class":1259},"now",[739,3050,3051],{"class":749},"() ",[739,3053,3054],{"class":745},"-",[739,3056,3057],{"class":855}," 60",[739,3059,3060],{"class":745}," *",[739,3062,3057],{"class":855},[739,3064,3060],{"class":745},[739,3066,3067],{"class":855}," 1000",[739,3069,1274],{"class":749},[739,3071,3072,3075,3077,3079,3081,3084,3087,3089,3091,3094,3096,3098,3101],{"class":741,"line":893},[739,3073,3074],{"class":1363}," for",[739,3076,1919],{"class":1363},[739,3078,1315],{"class":749},[739,3080,1833],{"class":753},[739,3082,3083],{"class":817}," event",[739,3085,3086],{"class":745}," of",[739,3088,2930],{"class":1259},[739,3090,1263],{"class":749},[739,3092,3093],{"class":745},"{",[739,3095,3032],{"class":817},[739,3097,1793],{"class":745},[739,3099,3100],{"class":749},")) ",[739,3102,2099],{"class":745},[739,3104,3105,3108,3110,3112],{"class":741,"line":923},[739,3106,3107],{"class":1259}," handle",[739,3109,1263],{"class":749},[739,3111,1410],{"class":817},[739,3113,1274],{"class":749},[739,3115,3116],{"class":741,"line":979},[739,3117,2177],{"class":745},[739,3119,3120],{"class":741,"line":1004},[739,3121,1204],{"emptyLinePlaceholder":1203},[739,3123,3124],{"class":741,"line":1026},[739,3125,3126],{"class":1220}," \u002F\u002F 2. Switch to the live SSE stream\n",[739,3128,3129,3131,3133,3135,3137,3140,3142,3144,3146,3148,3150,3152,3154,3156,3158,3161,3163,3166],{"class":741,"line":1047},[739,3130,1907],{"class":753},[739,3132,1912],{"class":817},[739,3134,1312],{"class":745},[739,3136,1315],{"class":749},[739,3138,3139],{"class":1363},"await",[739,3141,2950],{"class":1259},[739,3143,1263],{"class":749},[739,3145,1266],{"class":745},[739,3147,649],{"class":798},[739,3149,1266],{"class":745},[739,3151,862],{"class":745},[739,3153,1235],{"class":745},[739,3155,799],{"class":798},[739,3157,1266],{"class":745},[739,3159,3160],{"class":749},"))",[739,3162,619],{"class":745},[739,3164,3165],{"class":1259},"trim",[739,3167,1694],{"class":749},[739,3169,3170,3172,3174,3176,3178,3180,3182,3184],{"class":741,"line":1057},[739,3171,1907],{"class":753},[739,3173,1861],{"class":817},[739,3175,1312],{"class":745},[739,3177,1287],{"class":745},[739,3179,1290],{"class":1259},[739,3181,1263],{"class":749},[739,3183,1962],{"class":817},[739,3185,1274],{"class":749},[739,3187,3188,3190,3192,3194,3196,3198,3200,3202,3204],{"class":741,"line":1066},[739,3189,1975],{"class":817},[739,3191,619],{"class":745},[739,3193,1309],{"class":1259},[739,3195,1312],{"class":745},[739,3197,1315],{"class":745},[739,3199,1319],{"class":1318},[739,3201,673],{"class":745},[739,3203,1324],{"class":753},[739,3205,1327],{"class":745},[739,3207,3208,3210,3212,3214,3216,3218,3220,3222,3224,3226,3228],{"class":741,"line":1076},[739,3209,1227],{"class":753},[739,3211,1336],{"class":817},[739,3213,1312],{"class":745},[739,3215,1341],{"class":817},[739,3217,619],{"class":745},[739,3219,1346],{"class":1259},[739,3221,1263],{"class":749},[739,3223,1319],{"class":817},[739,3225,619],{"class":745},[739,3227,1355],{"class":817},[739,3229,1274],{"class":749},[739,3231,3232,3234,3236,3238,3240,3242,3244,3246,3248,3250,3252],{"class":741,"line":1098},[739,3233,2036],{"class":1363},[739,3235,1315],{"class":749},[739,3237,1369],{"class":817},[739,3239,619],{"class":745},[739,3241,1374],{"class":817},[739,3243,1377],{"class":745},[739,3245,1235],{"class":745},[739,3247,1382],{"class":798},[739,3249,1266],{"class":745},[739,3251,1387],{"class":749},[739,3253,1390],{"class":1363},[739,3255,3256,3258,3260,3262,3264,3266,3268,3270,3272,3274,3276,3278,3280,3282,3284,3286,3288,3290,3292],{"class":741,"line":1177},[739,3257,2036],{"class":1363},[739,3259,1315],{"class":749},[739,3261,1369],{"class":817},[739,3263,619],{"class":745},[739,3265,668],{"class":817},[739,3267,2071],{"class":745},[739,3269,1235],{"class":745},[739,3271,1410],{"class":798},[739,3273,1266],{"class":745},[739,3275,2080],{"class":745},[739,3277,1336],{"class":817},[739,3279,619],{"class":745},[739,3281,668],{"class":817},[739,3283,2071],{"class":745},[739,3285,1235],{"class":745},[739,3287,1428],{"class":798},[739,3289,1266],{"class":745},[739,3291,1387],{"class":749},[739,3293,2099],{"class":745},[739,3295,3296,3299,3301,3303,3305,3307],{"class":741,"line":1191},[739,3297,3298],{"class":1259}," handle",[739,3300,1263],{"class":749},[739,3302,1369],{"class":817},[739,3304,619],{"class":745},[739,3306,1355],{"class":817},[739,3308,1274],{"class":749},[739,3310,3311],{"class":741,"line":1200},[739,3312,1700],{"class":745},[739,3314,3315],{"class":741,"line":1207},[739,3316,2177],{"class":745},[739,3318,3319,3321,3323,3325,3327,3329,3331],{"class":741,"line":1217},[739,3320,2711],{"class":1363},[739,3322,1893],{"class":745},[739,3324,1324],{"class":753},[739,3326,1861],{"class":817},[739,3328,619],{"class":745},[739,3330,2206],{"class":1259},[739,3332,1694],{"class":749},[739,3334,3335],{"class":741,"line":1224},[739,3336,1001],{"class":745},[608,3338,3339,3341,3342,3345],{},[636,3340,638],{}," skips files outside the date range, so the replay step is fast even if you keep weeks of history. For a tail-only mode without on-disk replay, hit the stream server with ",[636,3343,3344],{},"?since=\u003Ciso>"," to reuse the in-process ring buffer instead.",[696,3347,3349],{"id":3348},"_4-node-bun-client-fetch-readablestream","4. Node \u002F Bun client (fetch + ReadableStream)",[608,3351,3352,3353,3355],{},"Same protocol, no ",[636,3354,660],{}," polyfill needed:",[730,3357,3359],{"className":2355,"code":3358,"language":1766,"meta":735,"style":735},"import { readFile } from 'node:fs\u002Fpromises'\n\nconst url = (await readFile('.evlog\u002Fstream.url', 'utf-8')).trim()\nconst res = await fetch(url)\nconst reader = res.body!.getReader()\nconst decoder = new TextDecoder()\nlet buffer = ''\n\nwhile (true) {\n const { value, done } = await reader.read()\n if (done) break\n buffer += decoder.decode(value, { stream: true })\n\n let idx\n while ((idx = buffer.indexOf('\\n\\n')) !== -1) {\n const frame = buffer.slice(0, idx)\n buffer = buffer.slice(idx + 2)\n const dataLine = frame.split('\\n').find(l => l.startsWith('data:'))\n if (!dataLine) continue\n const env = JSON.parse(dataLine.slice(5).trim())\n if (env.type === 'event') console.log(env.data)\n }\n}\n",[636,3360,3361,3379,3383,3422,3439,3463,3479,3491,3495,3510,3540,3554,3590,3594,3602,3646,3672,3697,3755,3771,3806,3846,3850],{"__ignoreMap":735},[739,3362,3363,3365,3367,3369,3371,3373,3375,3377],{"class":741,"line":742},[739,3364,1775],{"class":1363},[739,3366,845],{"class":745},[739,3368,2950],{"class":817},[739,3370,1793],{"class":745},[739,3372,1796],{"class":1363},[739,3374,1235],{"class":745},[739,3376,2959],{"class":798},[739,3378,1241],{"class":745},[739,3380,3381],{"class":741,"line":760},[739,3382,1204],{"emptyLinePlaceholder":1203},[739,3384,3385,3387,3390,3392,3394,3396,3398,3400,3402,3404,3406,3408,3410,3412,3414,3416,3418,3420],{"class":741,"line":770},[739,3386,1833],{"class":753},[739,3388,3389],{"class":817}," url ",[739,3391,792],{"class":745},[739,3393,1315],{"class":817},[739,3395,3139],{"class":1363},[739,3397,2950],{"class":1259},[739,3399,1263],{"class":817},[739,3401,1266],{"class":745},[739,3403,649],{"class":798},[739,3405,1266],{"class":745},[739,3407,862],{"class":745},[739,3409,1235],{"class":745},[739,3411,799],{"class":798},[739,3413,1266],{"class":745},[739,3415,3160],{"class":817},[739,3417,619],{"class":745},[739,3419,3165],{"class":1259},[739,3421,1694],{"class":817},[739,3423,3424,3426,3429,3431,3433,3436],{"class":741,"line":780},[739,3425,1833],{"class":753},[739,3427,3428],{"class":817}," res ",[739,3430,792],{"class":745},[739,3432,1919],{"class":1363},[739,3434,3435],{"class":1259}," fetch",[739,3437,3438],{"class":817},"(url)\n",[739,3440,3441,3443,3446,3448,3451,3453,3455,3458,3461],{"class":741,"line":806},[739,3442,1833],{"class":753},[739,3444,3445],{"class":817}," reader ",[739,3447,792],{"class":745},[739,3449,3450],{"class":817}," 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