[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"playground-fetch-race-condition-stale-responses":3,"verticals":19,"search-suggestions":58},{"slug":4,"title":5,"summary":6,"html":7,"css":8,"js":9,"config":10,"doc":13},"fetch-race-condition-stale-responses","race condition — interactive playground",null,"\u003Cdiv class=\"pg\">\n    \u003Ch1 class=\"pg-title\">🎮 The search box race condition\u003C\u002Fh1>\n    \u003Cp class=\"pg-sub\">\n      Type into the box below. Every keystroke fires a simulated network request with a \u003Cem>random\u003C\u002Fem>\n      delay — just like a real API. Watch what lands on screen when an older request finishes after a\n      newer one. Flip the mode to see the one-line fix stop it.\n    \u003C\u002Fp>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">1\u003C\u002Fspan> Controls\u003C\u002Fdiv>\n      \u003Cdiv class=\"field\">\n        \u003Clabel class=\"label\" for=\"searchBox\">Type a search term (try it fast)\u003C\u002Flabel>\n        \u003Cinput id=\"searchBox\" type=\"text\" placeholder=\"e.g. react\" autocomplete=\"off\" \u002F>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"btn-row\" style=\"margin-top: 12px\">\n        \u003Cdiv class=\"seg\" role=\"group\" aria-label=\"Mode\">\n          \u003Cbutton type=\"button\" id=\"modeNaive\" aria-pressed=\"true\">Naive (no guard)\u003C\u002Fbutton>\n          \u003Cbutton type=\"button\" id=\"modeFixed\" aria-pressed=\"false\">Fixed (requestId guard)\u003C\u002Fbutton>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"presets\" style=\"margin-top: 14px\">\n        \u003Cbutton class=\"btn sm\" id=\"presetTrap\">⚡ Replay the classic trap: react → vue\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn sm ghost\" id=\"resetBtn\">Reset\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cp class=\"hint\">\n        The trap preset rigs the timing on purpose — it types \"react\", then quickly replaces it with\n        \"vue\" while making \"react\"'s response arrive \u003Cem>after\u003C\u002Fem> \"vue\"'s. That's the exact bug from\n        the article, reproduced on demand instead of waiting for bad luck.\n      \u003C\u002Fp>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> What's on screen\u003C\u002Fdiv>\n      \u003Cdiv class=\"output\">\n        \u003Cdiv class=\"onscreen\">\n          Showing results for \u003Cspan class=\"q\" id=\"onscreenQuery\">—\u003C\u002Fspan>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"status\" id=\"statusBox\" style=\"margin-top: 12px\">\n        \u003Cspan class=\"dot info\" id=\"statusDot\">\u003C\u002Fspan>\n        \u003Cspan id=\"statusText\">Type something above to begin.\u003C\u002Fspan>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"stat-row\">\n        \u003Cdiv class=\"stat\">Requests sent\u003Cb id=\"statSent\">0\u003C\u002Fb>\u003C\u002Fdiv>\n        \u003Cdiv class=\"stat\">Rendered correctly\u003Cb id=\"statGood\">0\u003C\u002Fb>\u003C\u002Fdiv>\n        \u003Cdiv class=\"stat\">Wrong result shown\u003Cb id=\"statBad\">0\u003C\u002Fb>\u003C\u002Fdiv>\n        \u003Cdiv class=\"stat\">Dropped as stale\u003Cb id=\"statDropped\">0\u003C\u002Fb>\u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">3\u003C\u002Fspan> Request \u002F response log\u003C\u002Fdiv>\n      \u003Cdiv class=\"log\" id=\"log\" style=\"max-height: 220px; overflow-y: auto;\">\u003C\u002Fdiv>\n      \u003Cp class=\"hint\" style=\"margin-top: 10px\">\n        \u003Cspan style=\"color: var(--good)\">Green\u003C\u002Fspan> = correct render,\n        \u003Cspan style=\"color: var(--bad)\">red\u003C\u002Fspan> = a stale response overwrote the current one,\n        \u003Cspan style=\"color: var(--warn)\">amber\u003C\u002Fspan> = the fixed mode caught it and dropped it.\n      \u003C\u002Fp>\n    \u003C\u002Fdiv>\n  \u003C\u002Fdiv>","\u002F*\n * Shared playground design system — daily-post\n * ============================================\n * Link it from any post's playground\u002Findex.html (no per-post boilerplate):\n *\n *   \u003Clink rel=\"stylesheet\" href=\"..\u002F..\u002F..\u002Fplayground\u002Fassets\u002Fbase.css\" \u002F>\n *\n * The relative path resolves the same locally (posts\u002F\u003Cbase>\u002Fplayground\u002F) and on\n * the deployed host (public\u002Fposts\u002F\u003Cbase>\u002Fplayground\u002F), because build-site.js\n * mirrors this file to public\u002Fplayground\u002Fassets\u002Fbase.css. For a CodeSandbox\n * --embed, playground.js inlines this file so the single-file sandbox still styles.\n *\n * Then write ONLY the demo-specific CSS in your inline \u003Cstyle>. Everything below\n * — tokens, layout, panels, buttons, toggles, sliders, code blocks, status\u002Flog,\n * banners, presets — comes for free and looks consistent across every post.\n *\n * Theme-aware: dark by default, light via prefers-color-scheme AND a\n * [data-theme] override on \u003Chtml> (so a toggle can force either). Accessible:\n * real focus rings, adequate contrast, reduced-motion honored.\n *\u002F\n\n\u002F* ---------- design tokens ---------- *\u002F\n:root {\n  --bg: #0d1117;\n  --bg-grid: #ffffff0a;\n  --panel: #161b22;\n  --panel-2: #0b0e14;\n  --card: #0b0e14;\n  --ink: #e8ebf2;\n  --muted: #9aa4b2;\n  --faint: #6b7688;\n  --line: #232a35;\n  --line-soft: #ffffff12;\n  --accent: #7c9cff;\n  --accent-ink: #0b0e14;\n  --good: #3fb950;\n  --warn: #f0883e;\n  --bad: #f85149;\n  --info: #58a6ff;\n  --radius: 14px;\n  --radius-sm: 9px;\n  --shadow: 0 8px 30px #0006;\n  --shadow-sm: 0 4px 14px #0005;\n  --mono: ui-monospace, SFMono-Regular, \"SF Mono\", Menlo, Consolas, \"Liberation Mono\", monospace;\n  --sans: ui-sans-serif, system-ui, -apple-system, \"Segoe UI\", Roboto, \"Helvetica Neue\", sans-serif;\n  color-scheme: dark;\n}\n\n\u002F* Light theme — system preference, overridable by [data-theme] on \u003Chtml>. *\u002F\n@media (prefers-color-scheme: light) {\n  :root:not([data-theme=\"dark\"]) {\n    --bg: #f4f6fb;\n    --bg-grid: #00000008;\n    --panel: #ffffff;\n    --panel-2: #f0f3f9;\n    --card: #f7f9fc;\n    --ink: #131722;\n    --muted: #5b6472;\n    --faint: #8a93a3;\n    --line: #e2e7f0;\n    --line-soft: #00000010;\n    --accent: #2f6df0;\n    --accent-ink: #ffffff;\n    --good: #1a7f37;\n    --warn: #bc4c00;\n    --bad: #cf222e;\n    --info: #0969da;\n    --shadow: 0 8px 30px #0000001f;\n    --shadow-sm: 0 4px 14px #00000014;\n    color-scheme: light;\n  }\n}\n:root[data-theme=\"light\"] {\n  --bg: #f4f6fb;\n  --bg-grid: #00000008;\n  --panel: #ffffff;\n  --panel-2: #f0f3f9;\n  --card: #f7f9fc;\n  --ink: #131722;\n  --muted: #5b6472;\n  --faint: #8a93a3;\n  --line: #e2e7f0;\n  --line-soft: #00000010;\n  --accent: #2f6df0;\n  --accent-ink: #ffffff;\n  --good: #1a7f37;\n  --warn: #bc4c00;\n  --bad: #cf222e;\n  --info: #0969da;\n  --shadow: 0 8px 30px #0000001f;\n  --shadow-sm: 0 4px 14px #00000014;\n  color-scheme: light;\n}\n\n\u002F* ---------- reset & base ---------- *\u002F\n*, *::before, *::after { box-sizing: border-box; }\n\nbody {\n  margin: 0;\n  min-height: 100vh;\n  font-family: var(--sans);\n  color: var(--ink);\n  background:\n    radial-gradient(circle at 1px 1px, var(--bg-grid) 1px, transparent 0) 0 0 \u002F 24px 24px,\n    var(--bg);\n  display: flex;\n  justify-content: center;\n  align-items: flex-start;\n  padding: clamp(14px, 3vw, 26px);\n  line-height: 1.55;\n  -webkit-font-smoothing: antialiased;\n  text-rendering: optimizeLegibility;\n}\n\n\u002F* The single content column. *\u002F\n.pg {\n  width: 100%;\n  max-width: 860px;\n}\n\n\u002F* ---------- header ---------- *\u002F\n.pg-title {\n  font-size: clamp(1.15rem, 1rem + 1vw, 1.4rem);\n  font-weight: 800;\n  letter-spacing: -0.02em;\n  margin: 0 0 4px;\n  display: flex;\n  align-items: center;\n  gap: 9px;\n}\n.pg-sub {\n  color: var(--muted);\n  font-size: 0.92rem;\n  line-height: 1.5;\n  margin: 0 0 16px;\n  max-width: 66ch;\n}\n.pg-sub strong, .pg-sub b { color: var(--ink); font-weight: 700; }\n.pg-sub code { font-family: var(--mono); background: var(--line-soft); color: var(--accent);\n  padding: 1px 6px; border-radius: 6px; font-size: 0.85em; }\n\n\u002F* ---------- panels ---------- *\u002F\n.panel {\n  background: var(--panel);\n  border: 1px solid var(--line);\n  border-radius: var(--radius);\n  padding: 16px 18px;\n  margin-bottom: 14px;\n  box-shadow: var(--shadow-sm);\n}\n.panel-label {\n  font-size: 0.7rem;\n  text-transform: uppercase;\n  letter-spacing: 0.08em;\n  color: var(--muted);\n  font-weight: 800;\n  margin: 0 0 13px;\n  display: flex;\n  align-items: center;\n  gap: 8px;\n}\n.panel-label .n {\n  display: inline-grid; place-items: center;\n  width: 18px; height: 18px; border-radius: 50%;\n  background: var(--accent); color: var(--accent-ink);\n  font-size: 0.66rem; font-weight: 800;\n}\n\n\u002F* ---------- layout helpers ---------- *\u002F\n.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }\n.row.between { justify-content: space-between; }\n.col { display: flex; flex-direction: column; gap: 10px; }\n.grow { flex: 1 1 0; min-width: 0; }\n.wrap-controls { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: flex-end; }\n.field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }\n.field > .label, .ctl-label {\n  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em;\n  color: var(--muted); font-weight: 800;\n}\n\n\u002F* ---------- buttons ---------- *\u002F\n.btn {\n  font: inherit; font-weight: 650; font-size: 0.88rem;\n  cursor: pointer; user-select: none;\n  border: 1px solid var(--line);\n  background: var(--card); color: var(--ink);\n  padding: 9px 15px; border-radius: var(--radius-sm);\n  display: inline-flex; align-items: center; gap: 8px;\n  transition: background .15s ease, border-color .15s ease, transform .05s ease, color .15s ease;\n}\n.btn:hover { background: var(--line-soft); border-color: var(--muted); }\n.btn:active { transform: translateY(1px); }\n.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }\n.btn[disabled] { opacity: 0.45; cursor: not-allowed; }\n.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }\n.btn.primary:hover { filter: brightness(1.08); background: var(--accent); }\n.btn.good { background: var(--good); border-color: var(--good); color: #04140a; }\n.btn.bad  { background: var(--bad);  border-color: var(--bad);  color: #fff; }\n.btn.ghost { background: transparent; }\n.btn.sm { padding: 6px 11px; font-size: 0.82rem; }\n\n.btn-row { display: flex; flex-wrap: wrap; gap: 9px; }\n\n\u002F* Segmented control — a row of buttons where one is active (aria-pressed). *\u002F\n.seg { display: inline-flex; background: var(--card); border: 1px solid var(--line);\n  border-radius: var(--radius-sm); padding: 3px; gap: 3px; }\n.seg button {\n  font: inherit; font-weight: 650; font-size: 0.84rem; cursor: pointer;\n  border: none; background: transparent; color: var(--muted);\n  padding: 7px 13px; border-radius: 7px;\n  transition: background .15s ease, color .15s ease;\n}\n.seg button:hover { color: var(--ink); }\n.seg button[aria-pressed=\"true\"] { background: var(--accent); color: var(--accent-ink); }\n.seg button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }\n\n\u002F* Preset chips — worked-example shortcuts. *\u002F\n.presets { display: flex; flex-wrap: wrap; gap: 8px; }\n.presets .btn { background: var(--panel-2); }\n\n\u002F* ---------- toggle switch ---------- *\u002F\n.toggle { display: inline-flex; align-items: center; gap: 10px; cursor: pointer;\n  font-size: 0.88rem; font-weight: 600; user-select: none; }\n.toggle input { position: absolute; opacity: 0; width: 0; height: 0; }\n.switch { position: relative; width: 44px; height: 25px; border-radius: 999px; flex: none;\n  background: var(--line); border: 1px solid var(--line); transition: background .18s ease; }\n.switch::after { content: \"\"; position: absolute; top: 2px; left: 2px; width: 19px; height: 19px;\n  border-radius: 50%; background: #cfd6e4; transition: transform .18s ease; box-shadow: 0 1px 3px #0006; }\n.toggle input:checked + .switch { background: var(--good); border-color: var(--good); }\n.toggle input:checked + .switch::after { transform: translateX(19px); background: #fff; }\n.toggle input:focus-visible + .switch { outline: 2px solid var(--accent); outline-offset: 2px; }\n\n\u002F* ---------- range slider ---------- *\u002F\ninput[type=\"range\"] {\n  -webkit-appearance: none; appearance: none; width: 100%; height: 6px;\n  background: var(--line); border-radius: 999px; outline: none; cursor: pointer; margin: 8px 0;\n}\ninput[type=\"range\"]::-webkit-slider-thumb {\n  -webkit-appearance: none; appearance: none; width: 19px; height: 19px; border-radius: 50%;\n  background: var(--accent); border: 2px solid var(--panel); box-shadow: var(--shadow-sm); cursor: pointer;\n}\ninput[type=\"range\"]::-moz-range-thumb {\n  width: 19px; height: 19px; border-radius: 50%; background: var(--accent);\n  border: 2px solid var(--panel); box-shadow: var(--shadow-sm); cursor: pointer;\n}\ninput[type=\"range\"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }\n\n\u002F* ---------- text inputs \u002F selects ---------- *\u002F\ninput[type=\"text\"], input[type=\"number\"], input[type=\"search\"], select, textarea {\n  font: inherit; color: var(--ink); background: var(--card);\n  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 8px 11px; width: 100%;\n}\ntextarea { font-family: var(--mono); font-size: 0.85rem; line-height: 1.6; resize: vertical; }\ninput:focus-visible, select:focus-visible, textarea:focus-visible {\n  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);\n}\n\n\u002F* ---------- status \u002F output \u002F log ---------- *\u002F\n.status {\n  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;\n  font-size: 0.9rem; font-weight: 600;\n  padding: 11px 14px; border-radius: var(--radius-sm);\n  background: var(--panel-2); border: 1px solid var(--line); color: var(--ink);\n}\n.status.good { border-color: color-mix(in srgb, var(--good) 55%, var(--line)); }\n.status.warn { border-color: color-mix(in srgb, var(--warn) 55%, var(--line)); }\n.status.bad  { border-color: color-mix(in srgb, var(--bad) 55%, var(--line)); }\n.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); flex: none; }\n.dot.good { background: var(--good); } .dot.warn { background: var(--warn); }\n.dot.bad { background: var(--bad); } .dot.info { background: var(--info); }\n\n.output { background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm);\n  padding: 13px 15px; }\n.log { font-family: var(--mono); font-size: 0.8rem; line-height: 1.7; background: var(--card);\n  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 11px 14px;\n  max-height: 220px; overflow-y: auto; white-space: pre-wrap; }\n\n\u002F* ---------- code block + syntax tokens ---------- *\u002F\n.code {\n  font-family: var(--mono); font-size: 0.82rem; line-height: 1.7;\n  background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm);\n  padding: 13px 15px; overflow-x: auto; white-space: pre; tab-size: 2;\n}\n.code .tok-sel  { color: var(--accent); }\n.code .tok-prop { color: #86e29b; }\n.code .tok-kw   { color: #ff9bcb; }\n.code .tok-str  { color: #f0c674; }\n.code .tok-num  { color: #f0883e; }\n.code .tok-cmt  { color: var(--faint); font-style: italic; }\n.code .hl { background: color-mix(in srgb, var(--good) 22%, transparent); border-radius: 4px; padding: 0 3px; }\n\n\u002F* ---------- hint \u002F caption ---------- *\u002F\n.hint { font-size: 0.83rem; color: var(--muted); line-height: 1.55; margin: 10px 0 0; }\n.hint code { font-family: var(--mono); color: var(--ink); background: var(--line-soft);\n  padding: 1px 5px; border-radius: 5px; font-size: 0.86em; }\n.hint strong { color: var(--ink); }\n\n\u002F* ---------- banner (feature-support \u002F notices) ---------- *\u002F\n.banner {\n  display: none; margin-bottom: 14px; padding: 11px 14px; border-radius: 11px;\n  font-size: 0.85rem; line-height: 1.5;\n  color: var(--ink); background: color-mix(in srgb, var(--warn) 12%, var(--panel));\n  border: 1px solid color-mix(in srgb, var(--warn) 45%, var(--line));\n}\n.banner.show { display: block; }\n.banner.info { background: color-mix(in srgb, var(--info) 12%, var(--panel));\n  border-color: color-mix(in srgb, var(--info) 45%, var(--line)); }\n.banner code { font-family: var(--mono); background: var(--line-soft); padding: 1px 5px; border-radius: 5px; }\n\n\u002F* ---------- misc atoms ---------- *\u002F\n.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 0.75rem; font-weight: 700;\n  padding: 3px 9px; border-radius: 999px; background: var(--line-soft); color: var(--muted); }\n.pill.good { color: var(--good); background: color-mix(in srgb, var(--good) 16%, transparent); }\n.pill.bad  { color: var(--bad);  background: color-mix(in srgb, var(--bad) 16%, transparent); }\n.mono { font-family: var(--mono); }\n.muted { color: var(--muted); }\n.big-num { font-family: var(--mono); font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; }\n\n\u002F* Optional theme toggle button (top-right). Wire it in JS if you want it. *\u002F\n.theme-btn { position: fixed; top: 12px; right: 12px; z-index: 20; }\n\n\u002F* ---------- responsive ---------- *\u002F\n@media (max-width: 560px) {\n  .panel { padding: 14px; }\n  .wrap-controls { gap: 14px; }\n  .btn { padding: 9px 13px; }\n}\n\n\u002F* ---------- reduced motion ---------- *\u002F\n@media (prefers-reduced-motion: reduce) {\n  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }\n}\n\n\n\u002F* Demo-specific CSS only. base.css supplies tokens, layout, panels, buttons, toggles, logs. *\u002F\n  .onscreen {\n    font-size: 1.15rem;\n    font-weight: 700;\n    display: flex;\n    align-items: baseline;\n    gap: 8px;\n    flex-wrap: wrap;\n  }\n  .onscreen .q { color: var(--accent); font-family: var(--mono); }\n  .log-entry { display: block; }\n  .log-entry.sent { color: var(--muted); }\n  .log-entry.good { color: var(--good); }\n  .log-entry.bad { color: var(--bad); }\n  .log-entry.dropped { color: var(--warn); }\n  .stat-row { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 12px; }\n  .stat { font-size: 0.85rem; color: var(--muted); }\n  .stat b { display: block; font-size: 1.35rem; font-variant-numeric: tabular-nums; color: var(--ink); }","\"use strict\";\n  const $ = (id) => document.getElementById(id);\n  const searchBox = $(\"searchBox\");\n  const onscreenQuery = $(\"onscreenQuery\");\n  const statusBox = $(\"statusBox\");\n  const statusDot = $(\"statusDot\");\n  const statusText = $(\"statusText\");\n  const logEl = $(\"log\");\n  const modeNaiveBtn = $(\"modeNaive\");\n  const modeFixedBtn = $(\"modeFixed\");\n\n  let mode = \"naive\"; \u002F\u002F \"naive\" | \"fixed\"\n  let latestRequestId = 0;\n  let currentInputValue = \"\";\n  let renderedQuery = null;\n\n  let nSent = 0, nGood = 0, nBad = 0, nDropped = 0;\n  const stat = { sent: $(\"statSent\"), good: $(\"statGood\"), bad: $(\"statBad\"), dropped: $(\"statDropped\") };\n\n  function log(text, cls) {\n    const line = document.createElement(\"span\");\n    line.className = \"log-entry\" + (cls ? \" \" + cls : \"\");\n    line.textContent = text;\n    logEl.appendChild(line);\n    logEl.scrollTop = logEl.scrollHeight;\n  }\n\n  function setStatus(text, kind) {\n    statusText.textContent = text;\n    statusDot.className = \"dot \" + kind;\n  }\n\n  function render(query, requestId) {\n    \u002F\u002F The naive renderer trusts whatever arrives last, no matter when it was sent.\n    \u002F\u002F The fixed renderer checks identity against the latest request before painting.\n    if (mode === \"fixed\" && requestId !== latestRequestId) {\n      nDropped++; stat.dropped.textContent = String(nDropped);\n      log(`✗ dropped stale response for \"${query}\" (a newer search is in flight)`, \"dropped\");\n      return;\n    }\n\n    renderedQuery = query;\n    onscreenQuery.textContent = query;\n\n    if (query === currentInputValue) {\n      nGood++; stat.good.textContent = String(nGood);\n      log(`✓ rendered \"${query}\" — matches the box`, \"good\");\n      setStatus(`Showing \"${query}\" — correct.`, \"good\");\n    } else {\n      nBad++; stat.bad.textContent = String(nBad);\n      log(`✗ rendered \"${query}\" — but the box says \"${currentInputValue}\"!`, \"bad\");\n      setStatus(`Wrong! Box says \"${currentInputValue}\" but screen shows \"${query}\".`, \"bad\");\n    }\n  }\n\n  function search(query, forcedDelayMs) {\n    const requestId = ++latestRequestId;\n    nSent++; stat.sent.textContent = String(nSent);\n    const delay = forcedDelayMs != null ? forcedDelayMs : 150 + Math.random() * 750;\n    log(`→ sent request #${requestId} for \"${query}\" (will take ${Math.round(delay)}ms)`, \"sent\");\n\n    setTimeout(() => render(query, requestId), delay);\n  }\n\n  searchBox.addEventListener(\"input\", (e) => {\n    currentInputValue = e.target.value;\n    if (currentInputValue.trim() === \"\") {\n      onscreenQuery.textContent = \"—\";\n      setStatus(\"Type something above to begin.\", \"info\");\n      return;\n    }\n    search(currentInputValue);\n  });\n\n  function setMode(next) {\n    mode = next;\n    modeNaiveBtn.setAttribute(\"aria-pressed\", String(next === \"naive\"));\n    modeFixedBtn.setAttribute(\"aria-pressed\", String(next === \"fixed\"));\n  }\n\n  modeNaiveBtn.addEventListener(\"click\", () => setMode(\"naive\"));\n  modeFixedBtn.addEventListener(\"click\", () => setMode(\"fixed\"));\n\n  $(\"presetTrap\").addEventListener(\"click\", () => {\n    logEl.innerHTML = \"\";\n    nSent = nGood = nBad = nDropped = 0;\n    stat.sent.textContent = stat.good.textContent = stat.bad.textContent = stat.dropped.textContent = \"0\";\n\n    searchBox.value = \"react\";\n    currentInputValue = \"react\";\n    log('— typing \"react\" —', \"sent\");\n    search(\"react\", 900); \u002F\u002F slow — this is the one that should get dropped \u002F overwrite\n\n    setTimeout(() => {\n      searchBox.value = \"vue\";\n      currentInputValue = \"vue\";\n      log('— replaced with \"vue\" —', \"sent\");\n      search(\"vue\", 150); \u002F\u002F fast — this is the one the reader actually wants\n    }, 300);\n\n    setStatus(\"Watch what's on screen once both responses land.\", \"info\");\n  });\n\n  $(\"resetBtn\").addEventListener(\"click\", () => {\n    searchBox.value = \"\";\n    currentInputValue = \"\";\n    latestRequestId = 0;\n    renderedQuery = null;\n    onscreenQuery.textContent = \"—\";\n    logEl.innerHTML = \"\";\n    nSent = nGood = nBad = nDropped = 0;\n    stat.sent.textContent = stat.good.textContent = stat.bad.textContent = stat.dropped.textContent = \"0\";\n    setStatus(\"Type something above to begin.\", \"info\");\n  });",{"height":11,"autorun":12},520,true,{"slug":4,"title":14,"excerpt":15,"coverUrl":16,"vertical":17},"Stop Shipping Search Boxes With a Race Condition","Type fast into a search box wired to fetch(), and the result on screen isn't from your last keystroke — it's from whichever request happened to finish last. That's a race condition, and the fix is a one-line guard.","\u002Fmedia\u002Fcovers\u002Ffetch-race-condition-stale-responses.png",{"slug":18},"dev",[20,34,46],{"id":21,"slug":18,"name":22,"tagline":23,"description":24,"accentFrom":25,"accentTo":26,"icon":27,"defaultLocale":28,"locales":29,"features":31,"position":33},"019fe637-3d33-714b-b57f-23e163ffca0c","Web Development","Read it. Run it. Prove it.","A post a day on modern web development — most with an editable playground and a quiz that explains every answer. Free, no account needed.","violet-500","cyan-400","◇","en",[28,30],"fa",{"courses":12,"paths":12,"articles":12,"exams":32,"flashcards":32,"packages":12,"community":12,"certificates":12,"teams":12,"commerce":12},false,0,{"id":35,"slug":36,"name":37,"tagline":38,"description":39,"accentFrom":40,"accentTo":25,"icon":41,"defaultLocale":28,"locales":42,"features":44,"position":45},"019fe637-3dc2-754c-8657-0f175bfee7c6","lang","Languages","Learn a language the way you learn a codebase.","Grammar explained the way good documentation explains an API — one idea at a time, each with a quiz.","amber-400","⌘",[28,30,43],"es",{"courses":32,"paths":32,"articles":12,"exams":32,"flashcards":12,"packages":32,"community":12,"certificates":12,"teams":32,"commerce":32},2,{"id":47,"slug":48,"name":49,"tagline":50,"description":51,"accentFrom":52,"accentTo":53,"icon":54,"defaultLocale":28,"locales":55,"features":56,"position":57},"7b3c16f2-931d-410e-802e-e1fa4edab7de","soft","Soft Skills","The half of the job nobody wrote documentation for.","Weekly, on the parts of working life that decide more than your code does — first weeks, meetings, interviews, promotions, and the people around you. Written from what actually happens, and recorded as a podcast you can listen to on the walk.","emerald-400","teal-300","◉",[28],{"courses":32,"paths":32,"articles":12,"exams":32,"flashcards":32,"packages":32,"community":12,"certificates":32,"teams":32,"commerce":32},3,[59,63,67,71,75,79,83,87,91,95,98,102],{"slug":60,"name":61,"articles":62},"webdev","Webdev",170,{"slug":64,"name":65,"articles":66},"javascript","Javascript",137,{"slug":68,"name":69,"articles":70},"frontend","Frontend",94,{"slug":72,"name":73,"articles":74},"tutorial","Tutorial",69,{"slug":76,"name":77,"articles":78},"css","Css",50,{"slug":80,"name":81,"articles":82},"performance","Performance",30,{"slug":84,"name":85,"articles":86},"typescript","Typescript",25,{"slug":88,"name":89,"articles":90},"react","React",20,{"slug":92,"name":93,"articles":94},"browser","Browser",18,{"slug":96,"name":97,"articles":94},"programming","Programming",{"slug":99,"name":100,"articles":101},"node","Node",15,{"slug":103,"name":104,"articles":105},"html","Html",11]