Corner Shapes visualizer

HTML

CSS

<div id="shape-parent">
  <div class="controls-card">
    <div class="header">
      <h2>Corner Shape API</h2>
      <p>Supported in Chromium 139+</p>
    </div>
    <div class="control-group">
      <label for="shape-select">corner-shape</label>
      <div class="select-wrapper">
        <select id="shape-select">
          <option value="round">Round</option>
          <option value="scoop">Scoop</option>
          <option value="bevel">Bevel</option>
          <option value="notch">Notch</option>
          <option value="square">Square</option>
          <option value="squircle">Squircle</option>
        </select>
        <svg class="select-icon" xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>
      </div>
    </div>
    <div class="control-group">
      <div class="range-header">
        <label for="radius-range">border-radius</label>
        <span id="radius-value">100px</span>
      </div>
      <input type="range" id="radius-range" min="0" max="250" value="30">
    </div>
  </div>
</div>

:root {
  --bg-color: #0f172a;
  --card-bg: rgba(255, 255, 255, 0.95);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --accent-color: #6366f1;
}
* {
  box-sizing: border-box;
}
body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  color: var(--text-primary);
}
#shape-parent {
  position: relative;
  width: 350px;
  height: 350px;
  background: linear-gradient(135deg, #6366f1, #ec4899);
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 20px 50px -12px rgba(0, 0, 0, 0.5);
  --corner-shape: round;
  --border-radius: 30px;
  corner-shape: var(--corner-shape);
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
}
.controls-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 16px;
  width: 300px;
  box-shadow: 0 4px 24px -4px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  z-index: 10;
}
.header {
  text-align: center;
  h2 {
    margin: 0 0 0.25rem 0;
    font-size: 1.25rem;
  }
  p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
  }
}
.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}
.select-wrapper {
  position: relative;
}
select {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: #f1f5f9;
  border: 1px solid transparent;
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  appearance: none;
  cursor: pointer;
  transition: border-color 0.2s;
}
select:focus {
  outline: none;
  border-color: var(--accent-color);
}
.select-icon {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-secondary);
}
.range-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#radius-value {
  font-family: monospace;
  font-size: 0.75rem;
  background-color: #e0e7ff;
  color: var(--accent-color);
  padding: 2px 6px;
  border-radius: 4px;
}
input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: #e2e8f0;
  border-radius: 5px;
  outline: none;
  margin-top: 0.5rem;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent-color);
  cursor: pointer;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
input[type=range]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent-color);
  cursor: pointer;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}