Port logo generator to vanilla JS + Vite

Restructure the single-file demo into a Vite project:

- src/logo.js: framework-agnostic core (shadow-layer geometry,
  inline text-shadow, generated CSS snippet, defaults, font list)
- src/main.js: DOM wiring (state read, live render, copy, native reset)
- src/style.css, index.html: markup + styles with the accessibility
  fixes (labels, aria, <details>/<summary>, <form> reset, focus rings)

The original single-file version lives on the 'html' branch.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

index.html

@@ -7,7 +7,100 @@
   <link href="https://fonts.googleapis.com/css2?family=Anton&family=Bowlby+One&family=Bebas+Neue&family=Bungee&family=Passion+One:wght@900&family=Ultra&display=swap" rel="stylesheet">
 </head>
 <body>
-  <div id="root"></div>
+  <div class="logo" id="logo">LIBRE
-  <script type="module" src="/src/main.jsx"></script>
+TECH</div>
+
+  <details class="disclosure" id="panel" open>
+    <summary class="toggle-panel">Panel ein/aus</summary>
+
+    <div class="panel">
+      <h1>Logo-Generator</h1>
+
+      <form id="logoForm">
+        <h2>Inhalt</h2>
+        <p class="hint" id="hint-text">Mehrere Zeilen mit Enter trennen.</p>
+        <textarea id="text" rows="2" aria-label="Logo-Text" aria-describedby="hint-text">LIBRE
+TECH</textarea>
+
+        <h2>Schrift</h2>
+        <select id="font" aria-label="Schriftart">
+          <option value="Anton">Anton</option>
+          <option value="Bowlby One">Bowlby One</option>
+          <option value="Bebas Neue">Bebas Neue</option>
+          <option value="Bungee">Bungee</option>
+          <option value="Passion One">Passion One</option>
+          <option value="Ultra">Ultra</option>
+          <option value="Impact">Impact (System)</option>
+        </select>
+        <div class="row-2col">
+          <div>
+            <label for="fs">Größe: <span class="val" id="v-fs">18</span>vw</label>
+            <input type="range" id="fs" min="6" max="30" step="0.5" value="18">
+          </div>
+          <div>
+            <label for="lh">Zeilenabstand: <span class="val" id="v-lh">1.05</span></label>
+            <input type="range" id="lh" min="0.5" max="2" step="0.05" value="1.05">
+          </div>
+        </div>
+        <label for="ls">Buchstabenabstand: <span class="val" id="v-ls">0.010</span>em</label>
+        <input type="range" id="ls" min="-0.15" max="0.3" step="0.005" value="0.01">
+
+        <h2>Farben</h2>
+        <div class="color-row">
+          <input type="color" id="c-bg" value="#362582" aria-labelledby="lbl-bg">
+          <span class="swatch-label" id="lbl-bg">Hintergrund</span>
+          <span class="hex" id="hex-bg">#362582</span>
+        </div>
+        <div class="color-row">
+          <input type="color" id="c-face" value="#f6d939" aria-labelledby="lbl-face">
+          <span class="swatch-label" id="lbl-face">Face</span>
+          <span class="hex" id="hex-face">#f6d939</span>
+        </div>
+        <div class="color-row">
+          <input type="color" id="c-depth" value="#ea741e" aria-labelledby="lbl-depth">
+          <span class="swatch-label" id="lbl-depth">Tiefe</span>
+          <span class="hex" id="hex-depth">#ea741e</span>
+        </div>
+        <div class="color-row">
+          <input type="color" id="c-shadow" value="#221953" aria-labelledby="lbl-shadow">
+          <span class="swatch-label" id="lbl-shadow">Schatten &amp; Kontur</span>
+          <span class="hex" id="hex-shadow">#221953</span>
+        </div>
+
+        <h2>Lichtrichtung</h2>
+        <p class="hint">Steuert alle Versätze gleichzeitig — Schatten geht in Lichtrichtung, Tiefe entgegen.</p>
+        <label for="angle">Winkel: <span class="val" id="v-angle">133</span>° (0=oben, 90=rechts, 180=unten)</label>
+        <input type="range" id="angle" min="0" max="359" value="133">
+
+        <h2>Schichten</h2>
+        <p class="hint">Hinten nach vorn: Schatten · Tiefe · Kontur · Face</p>
+        <label for="shadow">Schatten-Länge: <span class="val" id="v-shadow">30</span>px</label>
+        <input type="range" id="shadow" min="0" max="80" value="30">
+        <label for="depth">Tiefe (in Gegenrichtung): <span class="val" id="v-depth">15</span>px</label>
+        <input type="range" id="depth" min="0" max="30" value="15">
+        <label for="contour">Kontur (vor der Tiefe): <span class="val" id="v-contour">11</span>px</label>
+        <input type="range" id="contour" min="0" max="20" value="11">
+
+        <h2>Komposition</h2>
+        <div class="row-2col">
+          <div>
+            <label for="rot">Drehung: <span class="val" id="v-rot">-10</span>°</label>
+            <input type="range" id="rot" min="-25" max="25" value="-10">
+          </div>
+          <div>
+            <label for="skew">Schräge: <span class="val" id="v-skew">-8</span>°</label>
+            <input type="range" id="skew" min="-20" max="20" value="-8">
+          </div>
+        </div>
+
+        <h2>Generiertes CSS</h2>
+        <code id="cssout"></code>
+        <button type="button" class="copy-btn" id="copyBtn">CSS kopieren</button>
+        <button type="reset" class="reset-btn" id="resetBtn">Zurücksetzen</button>
+      </form>
+    </div>
+  </details>
+
+  <script type="module" src="/src/main.js"></script>
 </body>
 </html>

package-lock.json

@@ -1,304 +1,17 @@
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+  "name": "demo-ecmascript",
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+      "name": "demo-ecmascript",
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       "license": "WTFPL",
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-        "react-dom": "^19.0.0"
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@@ -1402,16 +892,6 @@
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@@ -1445,66 +925,6 @@
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@@ -1524,16 +944,6 @@
         "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
       }
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-      "dev": true,
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@@ -1583,37 +993,6 @@
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-      "license": "MIT",
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-      "integrity": "sha512-0prMI+hvBbPjsWnxDLxlCGyM8PN6UuWjEUCYmZhO67xIV9Xasa/r/vDnq+Xyq4Lo27g8QSbO5YzARu0D1Sps3g==",
-      "license": "MIT",
-      "dependencies": {
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-      },
-      "peerDependencies": {
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-      "resolved": "https://registry.npmjs.org/react-refresh/-/react-refresh-0.17.0.tgz",
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-      "dev": true,
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@@ -1659,22 +1038,6 @@
         "fsevents": "~2.3.2"
       }
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-    "node_modules/scheduler": {
-      "version": "0.27.0",
-      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",
-      "integrity": "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q==",
-      "license": "MIT"
-    },
-    "node_modules/semver": {
-      "version": "6.3.1",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
-      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
-      "dev": true,
-      "license": "ISC",
-      "bin": {
-        "semver": "bin/semver.js"
-      }
-    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
@@ -1702,37 +1065,6 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
-    "node_modules/update-browserslist-db": {
-      "version": "1.2.3",
-      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.2.3.tgz",
-      "integrity": "sha512-Js0m9cx+qOgDxo0eMiFGEueWztz+d4+M3rGlmKPT+T4IS/jP4ylw3Nwpu6cpTTP8R1MAC1kF4VbdLt3ARf209w==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "opencollective",
-          "url": "https://opencollective.com/browserslist"
-        },
-        {
-          "type": "tidelift",
-          "url": "https://tidelift.com/funding/github/npm/browserslist"
-        },
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/ai"
-        }
-      ],
-      "license": "MIT",
-      "dependencies": {
-        "escalade": "^3.2.0",
-        "picocolors": "^1.1.1"
-      },
-      "bin": {
-        "update-browserslist-db": "cli.js"
-      },
-      "peerDependencies": {
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-      }
-    },
     "node_modules/vite": {
       "version": "6.4.2",
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@@ -1807,13 +1139,6 @@
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-    "node_modules/yallist": {
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-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
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-      "dev": true,
-      "license": "ISC"
     }
   }
 }

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "demo-ecmascript-react",
+  "name": "demo-ecmascript",
   "version": "1.0.0",
-  "description": "LIBRETECH logo generator — React + Vite",
+  "description": "LIBRETECH logo generator — vanilla JS + Vite",
   "repository": {
     "type": "git",
     "url": "ssh://tengo@git.librete.ch:41240/public/demo-ecmascript.git"
@@ -13,12 +13,7 @@
     "build": "vite build",
     "preview": "vite preview"
   },
-  "dependencies": {
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0"
-  },
   "devDependencies": {
-    "@vitejs/plugin-react": "^4.3.4",
     "vite": "^6.0.0"
   }
 }

src/App.jsx

@@ -1,135 +0,0 @@
-import { useEffect, useState } from 'react';
-import { defaults, fonts, logoStyle, cssOutput } from './logo.js';
-
-const FONT_LABELS = { Impact: 'Impact (System)' };
-
-export default function App() {
-  const [s, setS] = useState(defaults);
-  const [copied, setCopied] = useState(false);
-
-  const set = (key) => (value) => setS((prev) => ({ ...prev, [key]: value }));
-  const num = (key) => (e) => set(key)(+e.target.value);
-  const str = (key) => (e) => set(key)(e.target.value);
-
-  useEffect(() => {
-    document.body.style.background = s.bg;
-  }, [s.bg]);
-
-  const css = cssOutput(s);
-
-  const copy = async () => {
-    try {
-      await navigator.clipboard.writeText(css);
-      setCopied(true);
-      setTimeout(() => setCopied(false), 1500);
-    } catch {
-      alert('Kopieren fehlgeschlagen — bitte manuell aus dem Code-Feld kopieren.');
-    }
-  };
-
-  // Controlled inputs are not reset by the browser, so restore defaults here.
-  const reset = (e) => {
-    e.preventDefault();
-    setS(defaults);
-  };
-
-  return (
-    <>
-      <div className="logo" style={logoStyle(s)}>{s.text || ' '}</div>
-
-      <details className="disclosure" id="panel" open>
-        <summary className="toggle-panel">Panel ein/aus</summary>
-
-        <div className="panel">
-          <h1>Logo-Generator</h1>
-
-          <form id="logoForm" onSubmit={(e) => e.preventDefault()} onReset={reset}>
-            <h2>Inhalt</h2>
-            <p className="hint" id="hint-text">Mehrere Zeilen mit Enter trennen.</p>
-            <textarea
-              id="text"
-              rows={2}
-              aria-label="Logo-Text"
-              aria-describedby="hint-text"
-              value={s.text}
-              onChange={str('text')}
-            />
-
-            <h2>Schrift</h2>
-            <select id="font" aria-label="Schriftart" value={s.font} onChange={str('font')}>
-              {fonts.map((f) => (
-                <option key={f} value={f}>{FONT_LABELS[f] || f}</option>
-              ))}
-            </select>
-
-            <div className="row-2col">
-              <div>
-                <label htmlFor="fs">Größe: <span className="val">{s.fs}</span>vw</label>
-                <input type="range" id="fs" min="6" max="30" step="0.5" value={s.fs} onChange={num('fs')} />
-              </div>
-              <div>
-                <label htmlFor="lh">Zeilenabstand: <span className="val">{s.lh.toFixed(2)}</span></label>
-                <input type="range" id="lh" min="0.5" max="2" step="0.05" value={s.lh} onChange={num('lh')} />
-              </div>
-            </div>
-            <label htmlFor="ls">Buchstabenabstand: <span className="val">{s.ls.toFixed(3)}</span>em</label>
-            <input type="range" id="ls" min="-0.15" max="0.3" step="0.005" value={s.ls} onChange={num('ls')} />
-
-            <h2>Farben</h2>
-            <ColorRow id="bg" label="Hintergrund" value={s.bg} onChange={str('bg')} />
-            <ColorRow id="face" label="Face" value={s.face} onChange={str('face')} />
-            <ColorRow id="depth" label="Tiefe" value={s.depth} onChange={str('depth')} />
-            <ColorRow id="shadow" label="Schatten & Kontur" value={s.shadow} onChange={str('shadow')} />
-
-            <h2>Lichtrichtung</h2>
-            <p className="hint">Steuert alle Versätze gleichzeitig — Schatten geht in Lichtrichtung, Tiefe entgegen.</p>
-            <label htmlFor="angle">Winkel: <span className="val">{s.angle}</span>° (0=oben, 90=rechts, 180=unten)</label>
-            <input type="range" id="angle" min="0" max="359" value={s.angle} onChange={num('angle')} />
-
-            <h2>Schichten</h2>
-            <p className="hint">Hinten nach vorn: Schatten · Tiefe · Kontur · Face</p>
-            <label htmlFor="shadow-len">Schatten-Länge: <span className="val">{s.shadowLen}</span>px</label>
-            <input type="range" id="shadow-len" min="0" max="80" value={s.shadowLen} onChange={num('shadowLen')} />
-            <label htmlFor="depth-len">Tiefe (in Gegenrichtung): <span className="val">{s.depthLen}</span>px</label>
-            <input type="range" id="depth-len" min="0" max="30" value={s.depthLen} onChange={num('depthLen')} />
-            <label htmlFor="contour-len">Kontur (vor der Tiefe): <span className="val">{s.contourLen}</span>px</label>
-            <input type="range" id="contour-len" min="0" max="20" value={s.contourLen} onChange={num('contourLen')} />
-
-            <h2>Komposition</h2>
-            <div className="row-2col">
-              <div>
-                <label htmlFor="rot">Drehung: <span className="val">{s.rot}</span>°</label>
-                <input type="range" id="rot" min="-25" max="25" value={s.rot} onChange={num('rot')} />
-              </div>
-              <div>
-                <label htmlFor="skew">Schräge: <span className="val">{s.skew}</span>°</label>
-                <input type="range" id="skew" min="-20" max="20" value={s.skew} onChange={num('skew')} />
-              </div>
-            </div>
-
-            <h2>Generiertes CSS</h2>
-            <code id="cssout">{css}</code>
-            <button
-              type="button"
-              className={'copy-btn' + (copied ? ' copied' : '')}
-              onClick={copy}
-            >
-              {copied ? 'Kopiert!' : 'CSS kopieren'}
-            </button>
-            <button type="reset" className="reset-btn">Zurücksetzen</button>
-          </form>
-        </div>
-      </details>
-    </>
-  );
-}
-
-function ColorRow({ id, label, value, onChange }) {
-  return (
-    <div className="color-row">
-      <input type="color" id={`c-${id}`} value={value} onChange={onChange} aria-labelledby={`lbl-${id}`} />
-      <span className="swatch-label" id={`lbl-${id}`}>{label}</span>
-      <span className="hex">{value}</span>
-    </div>
-  );
-}

src/main.js

@@ -0,0 +1,83 @@
+import './style.css';
+import { inlineTextShadow, cssOutput } from './logo.js';
+
+const $ = (id) => document.getElementById(id);
+const logo = $('logo');
+const cssout = $('cssout');
+
+function readState() {
+  return {
+    text: $('text').value || ' ',
+    font: $('font').value,
+    fs: +$('fs').value,
+    lh: +$('lh').value,
+    ls: +$('ls').value,
+    bg: $('c-bg').value,
+    face: $('c-face').value,
+    depth: $('c-depth').value,
+    shadow: $('c-shadow').value,
+    angle: +$('angle').value,
+    shadowLen: +$('shadow').value,
+    depthLen: +$('depth').value,
+    contourLen: +$('contour').value,
+    rot: +$('rot').value,
+    skew: +$('skew').value,
+  };
+}
+
+function render() {
+  const s = readState();
+
+  $('v-fs').textContent = s.fs;
+  $('v-lh').textContent = s.lh.toFixed(2);
+  $('v-ls').textContent = s.ls.toFixed(3);
+  $('v-angle').textContent = s.angle;
+  $('v-shadow').textContent = s.shadowLen;
+  $('v-depth').textContent = s.depthLen;
+  $('v-contour').textContent = s.contourLen;
+  $('v-rot').textContent = s.rot;
+  $('v-skew').textContent = s.skew;
+  $('hex-bg').textContent = s.bg;
+  $('hex-face').textContent = s.face;
+  $('hex-depth').textContent = s.depth;
+  $('hex-shadow').textContent = s.shadow;
+
+  logo.textContent = s.text;
+  logo.style.textShadow = inlineTextShadow(s);
+  logo.style.transform = `rotate(${s.rot}deg) skewX(${s.skew}deg)`;
+  logo.style.fontFamily = `'${s.font}', 'Bebas Neue', Impact, sans-serif`;
+  logo.style.color = s.face;
+  logo.style.fontSize = s.fs + 'vw';
+  logo.style.lineHeight = s.lh;
+  logo.style.letterSpacing = s.ls + 'em';
+  document.body.style.background = s.bg;
+
+  cssout.textContent = cssOutput(s);
+}
+
+document
+  .querySelectorAll('#logoForm input, #logoForm select, #logoForm textarea')
+  .forEach((el) => el.addEventListener('input', render));
+
+$('copyBtn').addEventListener('click', async () => {
+  try {
+    await navigator.clipboard.writeText(cssout.textContent);
+    const btn = $('copyBtn');
+    btn.textContent = 'Kopiert!';
+    btn.classList.add('copied');
+    setTimeout(() => {
+      btn.textContent = 'CSS kopieren';
+      btn.classList.remove('copied');
+    }, 1500);
+  } catch {
+    alert('Kopieren fehlgeschlagen — bitte manuell aus dem Code-Feld kopieren.');
+  }
+});
+
+// Native <button type="reset"> restores every field to its value= attribute;
+// re-render on the next tick once the reset has applied.
+const form = $('logoForm');
+form.addEventListener('reset', () => setTimeout(render, 0));
+form.addEventListener('submit', (e) => e.preventDefault());
+
+render();

src/main.jsx

@@ -1,10 +0,0 @@
-import { StrictMode } from 'react';
-import { createRoot } from 'react-dom/client';
-import App from './App.jsx';
-import './style.css';
-
-createRoot(document.getElementById('root')).render(
-  <StrictMode>
-    <App />
-  </StrictMode>,
-);

src/style.css

@@ -9,7 +9,6 @@ body {
   overflow: hidden;
   transition: background 0.15s;
 }
-#root { display: contents; }
 .logo {
   font-size: 18vw;
   font-weight: 400;

vite.config.js

@@ -1,6 +1,5 @@
 import { defineConfig } from 'vite';
-import react from '@vitejs/plugin-react';
 
 export default defineConfig({
-  plugins: [react()],
+  // index.html at project root is the single entry; defaults are fine.
 });