[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"playground-matchmedia-watch-media-queries-from-js":3,"verticals":19,"search-suggestions":58},{"slug":4,"title":5,"summary":6,"html":7,"css":8,"js":9,"config":10,"doc":13},"matchmedia-watch-media-queries-from-js","matchMedia — watch queries change live",null,"\u003Cdiv class=\"pg\">\n    \u003Ch1 class=\"pg-title\">🎮 matchMedia, watched live\u003C\u002Fh1>\n    \u003Cp class=\"pg-sub\">\n      \u003Ccode>window.matchMedia(query)\u003C\u002Fcode> gives you a live object with a \u003Ccode>change\u003C\u002Fcode>\n      event — it fires once, exactly when the query's answer flips. Resize this browser\n      window and flip your OS dark-mode \u002F reduced-motion settings to see it react in real time.\n    \u003C\u002Fp>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">1\u003C\u002Fspan> Live dashboard\u003C\u002Fdiv>\n      \u003Cdiv class=\"rows\" id=\"dashboard\">\u003C\u002Fdiv>\n      \u003Cp class=\"hint\" id=\"dashHint\">\n        Green = currently matches. Drag your browser window's edge to flip the width rows.\n        Toggle dark mode or \"reduce motion\" in your OS settings to flip the others —\n        no reload required.\n      \u003C\u002Fp>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> resize vs. matchMedia: the event race\u003C\u002Fdiv>\n      \u003Cdiv class=\"race-grid\">\n        \u003Cdiv class=\"race-card\">\n          \u003Cspan class=\"race-label\">❌ window \u003Ccode>resize\u003C\u002Fcode> events\u003C\u002Fspan>\n          \u003Cspan class=\"big-num\" id=\"resizeCount\">0\u003C\u002Fspan>\n          \u003Cspan class=\"muted\">fires on every pixel of movement\u003C\u002Fspan>\n        \u003C\u002Fdiv>\n        \u003Cdiv class=\"race-card\">\n          \u003Cspan class=\"race-label\">✅ matchMedia \u003Ccode>change\u003C\u002Fcode> events\u003C\u002Fspan>\n          \u003Cspan class=\"big-num\" id=\"matchCount\">0\u003C\u002Fspan>\n          \u003Cspan class=\"muted\">fires only when a breakpoint actually flips\u003C\u002Fspan>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"btn-row\" style=\"margin-top:14px\">\n        \u003Cbutton class=\"btn ghost\" id=\"resetRace\">Reset counters\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cp class=\"hint\">\n        Same physical motion, same drag — count these while you slowly resize the window\n        past 600px or 900px. The left number climbs continuously. The right number only\n        moves when a row above actually changes color.\n      \u003C\u002Fp>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">3\u003C\u002Fspan> Test your own query\u003C\u002Fdiv>\n      \u003Cdiv class=\"tester-row\">\n        \u003Cinput type=\"text\" id=\"customQuery\" placeholder=\"(min-width: 1200px)\" value=\"(min-width: 1200px)\" \u002F>\n        \u003Cbutton class=\"btn primary\" id=\"testQuery\">Watch it\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"presets\" style=\"margin-top:12px\">\n        \u003Cbutton class=\"btn sm\" data-q=\"(orientation: landscape)\">(orientation: landscape)\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn sm\" data-q=\"(hover: hover) and (pointer: fine)\">(hover: hover) and (pointer: fine)\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn sm\" data-q=\"(prefers-contrast: more)\">(prefers-contrast: more)\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"status\" id=\"testerStatus\" style=\"margin-top:14px\">\n        \u003Cspan class=\"dot info\" id=\"testerDot\">\u003C\u002Fspan>\u003Cspan id=\"testerText\">Enter a query and click \"Watch it\".\u003C\u002Fspan>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"log\" id=\"log\" style=\"margin-top:10px; max-height: 140px; overflow-y: auto;\">\u003C\u002Fdiv>\n      \u003Cp class=\"hint\">Every \"watch it\" click subscribes fresh — the log below timestamps each change event as it fires.\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.rows { display: flex; flex-direction: column; gap: 8px; }\n  .row-item {\n    display: flex; align-items: center; gap: 10px;\n    padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm);\n    background: var(--panel-2);\n  }\n  .row-item .dot { flex: 0 0 auto; }\n  .row-item .label { font-weight: 600; }\n  .row-item .query { margin-left: auto; font-family: var(--mono); font-size: 0.85rem; color: var(--muted); }\n  .race-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }\n  @media (min-width: 640px) { .race-grid { grid-template-columns: 1fr 1fr; } }\n  .race-card { text-align: center; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--panel-2); }\n  .race-card .big-num { display: block; margin: 6px 0; }\n  .race-card .race-label { font-weight: 600; }\n  .tester-row { display: flex; gap: 8px; flex-wrap: wrap; }\n  .tester-row input {\n    flex: 1 1 240px; min-width: 0; font-family: var(--mono); font-size: 0.9rem;\n    padding: 9px 11px; border-radius: var(--radius-sm); border: 1px solid var(--line);\n    background: var(--panel-2); color: var(--ink);\n  }\n  .tester-row input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }","\"use strict\";\n  const $ = (id) => document.getElementById(id);\n\n  const DASHBOARD_QUERIES = [\n    { label: \"Narrow (max-width: 599px)\", query: \"(max-width: 599px)\" },\n    { label: \"Medium (600px–899px)\", query: \"(min-width: 600px) and (max-width: 899px)\" },\n    { label: \"Wide (min-width: 900px)\", query: \"(min-width: 900px)\" },\n    { label: \"Dark mode preferred\", query: \"(prefers-color-scheme: dark)\" },\n    { label: \"Reduced motion preferred\", query: \"(prefers-reduced-motion: reduce)\" },\n    { label: \"Primary pointer is a mouse\", query: \"(hover: hover) and (pointer: fine)\" },\n  ];\n\n  const dashboardEl = $(\"dashboard\");\n  let matchEventCount = 0;\n\n  DASHBOARD_QUERIES.forEach((item, i) => {\n    const mql = window.matchMedia(item.query);\n\n    const row = document.createElement(\"div\");\n    row.className = \"row-item\";\n    row.innerHTML =\n      '\u003Cspan class=\"dot ' + (mql.matches ? \"good\" : \"\") + '\" id=\"dashDot' + i + '\">\u003C\u002Fspan>' +\n      '\u003Cspan class=\"label\">' + item.label + \"\u003C\u002Fspan>\" +\n      '\u003Cspan class=\"query\">' + item.query + \"\u003C\u002Fspan>\";\n    dashboardEl.appendChild(row);\n\n    mql.addEventListener(\"change\", (event) => {\n      $(\"dashDot\" + i).className = \"dot \" + (event.matches ? \"good\" : \"\");\n      matchEventCount++;\n      $(\"matchCount\").textContent = matchEventCount;\n    });\n  });\n\n  let resizeEventCount = 0;\n  window.addEventListener(\"resize\", () => {\n    resizeEventCount++;\n    $(\"resizeCount\").textContent = resizeEventCount;\n  });\n\n  $(\"resetRace\").addEventListener(\"click\", () => {\n    resizeEventCount = 0;\n    matchEventCount = 0;\n    $(\"resizeCount\").textContent = \"0\";\n    $(\"matchCount\").textContent = \"0\";\n  });\n\n  let activeMql = null;\n  let activeHandler = null;\n\n  function watchQuery(queryText) {\n    if (activeMql && activeHandler) {\n      activeMql.removeEventListener(\"change\", activeHandler);\n    }\n\n    let mql;\n    try {\n      mql = window.matchMedia(queryText);\n    } catch {\n      $(\"testerDot\").className = \"dot bad\";\n      $(\"testerText\").textContent = \"Not a valid media query.\";\n      return;\n    }\n\n    const setNow = () => {\n      $(\"testerDot\").className = \"dot \" + (mql.matches ? \"good\" : \"\");\n      $(\"testerText\").textContent = mql.matches ? \"Matches right now.\" : \"Does not match right now.\";\n    };\n    setNow();\n\n    activeHandler = (event) => {\n      setNow();\n      const time = new Date().toLocaleTimeString();\n      const line = document.createElement(\"div\");\n      line.textContent = \"[\" + time + \"] \" + queryText + \" → \" + (event.matches ? \"matches\" : \"no longer matches\");\n      $(\"log\").prepend(line);\n    };\n    mql.addEventListener(\"change\", activeHandler);\n    activeMql = mql;\n  }\n\n  $(\"testQuery\").addEventListener(\"click\", () => watchQuery($(\"customQuery\").value.trim()));\n  document.querySelectorAll(\"[data-q]\").forEach((btn) => {\n    btn.addEventListener(\"click\", () => {\n      $(\"customQuery\").value = btn.dataset.q;\n      watchQuery(btn.dataset.q);\n    });\n  });",{"height":11,"autorun":12},520,true,{"slug":4,"title":14,"excerpt":15,"coverUrl":16,"vertical":17},"Stop Debouncing Resize. The Browser Already Watches It.","A debounced resize handler comparing window.innerWidth to a magic number can't ever see dark mode or reduced motion — and it fires dozens of times for one thing matchMedia fires once for.","\u002Fmedia\u002Fcovers\u002Fmatchmedia-watch-media-queries-from-js.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,[59,63,67,71,75,79,83,87,90,94,98,102],{"slug":60,"name":61,"articles":62},"webdev","Webdev",99,{"slug":64,"name":65,"articles":66},"javascript","Javascript",83,{"slug":68,"name":69,"articles":70},"frontend","Frontend",70,{"slug":72,"name":73,"articles":74},"css","Css",33,{"slug":76,"name":77,"articles":78},"tutorial","Tutorial",27,{"slug":80,"name":81,"articles":82},"typescript","Typescript",14,{"slug":84,"name":85,"articles":86},"performance","Performance",12,{"slug":88,"name":89,"articles":86},"react","React",{"slug":91,"name":92,"articles":93},"browser","Browser",9,{"slug":95,"name":96,"articles":97},"node","Node",8,{"slug":99,"name":100,"articles":101},"grammar","Grammar",6,{"slug":103,"name":104,"articles":101},"programming","Programming"]