[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"verticals":3,"playground-css-trigonometric-functions-radial-layout":32,"search-suggestions":46},[4,20],{"id":5,"slug":6,"name":7,"tagline":8,"description":9,"accentFrom":10,"accentTo":11,"icon":12,"defaultLocale":13,"locales":14,"features":16,"position":19},"019fe637-3d33-714b-b57f-23e163ffca0c","dev","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",[13,15],"fa",{"courses":17,"paths":17,"articles":17,"exams":18,"flashcards":18,"packages":17,"community":17,"certificates":17,"teams":17,"commerce":17},true,false,0,{"id":21,"slug":22,"name":23,"tagline":24,"description":25,"accentFrom":26,"accentTo":10,"icon":27,"defaultLocale":13,"locales":28,"features":30,"position":31},"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","⌘",[13,15,29],"es",{"courses":18,"paths":18,"articles":17,"exams":18,"flashcards":17,"packages":18,"community":17,"certificates":17,"teams":18,"commerce":18},2,{"slug":33,"title":34,"summary":35,"html":36,"css":37,"js":38,"config":39,"doc":41},"css-trigonometric-functions-radial-layout","CSS trig radial layout — interactive playground",null,"\u003Cdiv class=\"pg\">\n    \u003Ch1 class=\"pg-title\">🎮 Radial Layout Lab\u003C\u002Fh1>\n    \u003Cp class=\"pg-sub\">\n      Every dot below is positioned by CSS's own \u003Ccode>cos()\u003C\u002Fcode> and \u003Ccode>sin()\u003C\u002Fcode>.\n      JavaScript touches each dot exactly once, to hand it an index — drag the sliders and\n      watch CSS do the rest.\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=\"wrap-controls\">\n        \u003Cdiv class=\"field\">\n          \u003Clabel class=\"label\" for=\"count\">Items — \u003Cspan id=\"countVal\">6\u003C\u002Fspan>\u003C\u002Flabel>\n          \u003Cinput type=\"range\" id=\"count\" min=\"3\" max=\"12\" value=\"6\" step=\"1\" \u002F>\n        \u003C\u002Fdiv>\n        \u003Cdiv class=\"field\">\n          \u003Clabel class=\"label\" for=\"radius\">Radius — \u003Cspan id=\"radiusVal\">110\u003C\u002Fspan>px\u003C\u002Flabel>\n          \u003Cinput type=\"range\" id=\"radius\" min=\"40\" max=\"150\" value=\"110\" step=\"1\" \u002F>\n        \u003C\u002Fdiv>\n        \u003Cdiv class=\"field\">\n          \u003Clabel class=\"label\" for=\"stageWidth\">Container width — \u003Cspan id=\"stageWidthVal\">100\u003C\u002Fspan>%\u003C\u002Flabel>\n          \u003Cinput type=\"range\" id=\"stageWidth\" min=\"40\" max=\"100\" value=\"100\" step=\"1\" \u002F>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"presets\" style=\"margin-top: 14px\">\n        \u003Cbutton class=\"btn sm\" data-preset=\"menu\">Radial menu (8)\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn sm\" data-preset=\"clock\">Clock ticks (12)\u003C\u002Fbutton>\n        \u003Cbutton class=\"btn sm\" data-preset=\"tight\">Tight cluster\u003C\u002Fbutton>\n      \u003C\u002Fdiv>\n    \u003C\u002Fdiv>\n\n    \u003Cdiv class=\"panel\">\n      \u003Cdiv class=\"panel-label\">\u003Cspan class=\"n\">2\u003C\u002Fspan> Result — no JS ran after you dragged\u003C\u002Fdiv>\n      \u003Cdiv class=\"stage-wrap\" id=\"stageWrap\">\n        \u003Cdiv class=\"stage\" id=\"stage\" style=\"--count: 6; --radius: 110px;\">\n          \u003Cdiv class=\"hub\">circle\u003Cbr \u002F>center\u003C\u002Fdiv>\n        \u003C\u002Fdiv>\n      \u003C\u002Fdiv>\n      \u003Cdiv class=\"status\" id=\"status\" style=\"margin-top: 12px\">\n        \u003Cspan class=\"dot good\" id=\"dot\">\u003C\u002Fspan\n        >\u003Cspan id=\"statusText\">6 items, radius 110px — positioned entirely by CSS.\u003C\u002Fspan>\n      \u003C\u002Fdiv>\n      \u003Cp class=\"hint\">\n        Drag \"Container width\" down — the whole circle rescales instantly. That's plain CSS\n        responding to layout, not a resize listener recomputing anything.\n      \u003C\u002Fp>\n      \u003Cdiv class=\"code\" id=\"codeOut\" style=\"margin-top: 10px\">\u003C\u002Fdiv>\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.stage-wrap {\n    margin: 10px auto 0;\n    width: 100%;\n    max-width: 340px;\n    transition: max-width 0.2s ease;\n  }\n  .stage {\n    position: relative;\n    aspect-ratio: 1;\n    margin: 0 auto;\n    border: 1px dashed var(--line);\n    border-radius: 50%;\n    background: var(--panel-2);\n  }\n  .hub {\n    position: absolute;\n    top: 50%;\n    left: 50%;\n    transform: translate(-50%, -50%);\n    width: 62px;\n    height: 62px;\n    border-radius: 50%;\n    background: var(--panel);\n    border: 1px solid var(--line);\n    display: grid;\n    place-items: center;\n    font-size: 0.7rem;\n    color: var(--muted);\n    text-align: center;\n    line-height: 1.2;\n  }\n  .item {\n    position: absolute;\n    top: 50%;\n    left: 50%;\n    width: 30px;\n    height: 30px;\n    border-radius: 50%;\n    background: var(--accent);\n    color: var(--accent-ink);\n    display: grid;\n    place-items: center;\n    font: 700 0.7rem var(--mono);\n    box-shadow: var(--shadow-sm);\n    \u002F* This is the whole trick: an index and a count come from JS once.\n       Every angle and every x\u002Fy offset after that is CSS's own math. *\u002F\n    --angle: calc(360deg \u002F var(--count) * var(--i));\n    transform:\n      translate(-50%, -50%)\n      translate(\n        calc(cos(var(--angle)) * var(--radius)),\n        calc(sin(var(--angle)) * var(--radius))\n      );\n  }\n  .wrap-controls { display: grid; gap: 14px; }\n  @media (min-width: 520px) {\n    .wrap-controls { grid-template-columns: 1fr 1fr 1fr; }\n  }","\"use strict\";\n    const $ = (id) => document.getElementById(id);\n    const stage = $(\"stage\");\n    const stageWrap = $(\"stageWrap\");\n\n    function setStatus(text, kind = \"good\") {\n      $(\"statusText\").textContent = text;\n      $(\"dot\").className = \"dot \" + kind;\n    }\n\n    function render() {\n      const count = Number($(\"count\").value);\n      const radius = Number($(\"radius\").value);\n      const width = Number($(\"stageWidth\").value);\n\n      $(\"countVal\").textContent = count;\n      $(\"radiusVal\").textContent = radius;\n      $(\"stageWidthVal\").textContent = width;\n\n      stage.style.setProperty(\"--count\", count);\n      stage.style.setProperty(\"--radius\", radius + \"px\");\n      stageWrap.style.maxWidth = (340 * (width \u002F 100)).toFixed(0) + \"px\";\n\n      const existing = stage.querySelectorAll(\".item\");\n      if (existing.length !== count) {\n        existing.forEach((el) => el.remove());\n        for (let i = 0; i \u003C count; i++) {\n          const dot = document.createElement(\"div\");\n          dot.className = \"item\";\n          dot.style.setProperty(\"--i\", i);\n          dot.textContent = i + 1;\n          stage.appendChild(dot);\n        }\n      }\n\n      const angleDeg = Math.round((360 \u002F count) * 1);\n      const xAtItem1 = (Math.cos((angleDeg * Math.PI) \u002F 180) * radius).toFixed(0);\n      $(\"codeOut\").innerHTML =\n        '\u003Cspan class=\"tok-cmt\">\u002F* CSS computed this for item #2 (i = 1) *\u002F\u003C\u002Fspan>\\n' +\n        '\u003Cspan class=\"tok-prop\">--angle\u003C\u002Fspan>: \u003Cspan class=\"tok-num\">' +\n        angleDeg +\n        'deg\u003C\u002Fspan>;  \u003Cspan class=\"tok-cmt\">\u002F* 360deg \u002F ' +\n        count +\n        ' * 1 *\u002F\u003C\u002Fspan>\\n' +\n        '\u003Cspan class=\"tok-kw\">cos\u003C\u002Fspan>(\u003Cspan class=\"tok-num\">' +\n        angleDeg +\n        'deg\u003C\u002Fspan>) * \u003Cspan class=\"tok-num\">' +\n        radius +\n        'px\u003C\u002Fspan> = \u003Cspan class=\"tok-str\">' +\n        xAtItem1 +\n        'px\u003C\u002Fspan>  \u003Cspan class=\"tok-cmt\">\u002F* its x-offset *\u002F\u003C\u002Fspan>';\n\n      setStatus(\n        count + \" items, radius \" + radius + \"px at \" + width + \"% width — CSS positioned every one.\",\n        \"good\"\n      );\n    }\n\n    $(\"count\").addEventListener(\"input\", render);\n    $(\"radius\").addEventListener(\"input\", render);\n    $(\"stageWidth\").addEventListener(\"input\", render);\n\n    document.querySelectorAll(\"[data-preset]\").forEach((btn) => {\n      btn.addEventListener(\"click\", () => {\n        const preset = btn.dataset.preset;\n        if (preset === \"menu\") {\n          $(\"count\").value = 8;\n          $(\"radius\").value = 120;\n          $(\"stageWidth\").value = 100;\n        } else if (preset === \"clock\") {\n          $(\"count\").value = 12;\n          $(\"radius\").value = 130;\n          $(\"stageWidth\").value = 100;\n        } else if (preset === \"tight\") {\n          $(\"count\").value = 5;\n          $(\"radius\").value = 55;\n          $(\"stageWidth\").value = 60;\n        }\n        render();\n      });\n    });\n\n    render();",{"height":40,"autorun":17},520,{"slug":33,"title":42,"excerpt":43,"coverUrl":44,"vertical":45},"Stop Writing Math.cos() in a Resize Listener","CSS learned trigonometry. Here's the radial menu that used to need a resize listener — and doesn't anymore.","\u002Fmedia\u002Fcovers\u002Fcss-trigonometric-functions-radial-layout.png",{"slug":6},[47,51,55,58,62,66,70,74,78,82,86,89],{"slug":48,"name":49,"articles":50},"webdev","Webdev",56,{"slug":52,"name":53,"articles":54},"frontend","Frontend",50,{"slug":56,"name":57,"articles":54},"javascript","Javascript",{"slug":59,"name":60,"articles":61},"css","Css",21,{"slug":63,"name":64,"articles":65},"typescript","Typescript",10,{"slug":67,"name":68,"articles":69},"performance","Performance",8,{"slug":71,"name":72,"articles":73},"grammar","Grammar",6,{"slug":75,"name":76,"articles":77},"react","React",5,{"slug":79,"name":80,"articles":81},"node","Node",4,{"slug":83,"name":84,"articles":85},"ai","Ai",3,{"slug":87,"name":88,"articles":85},"html","Html",{"slug":90,"name":91,"articles":85},"tutorial","Tutorial"]