Runs/circle · chain · relay/012
circle · chain · relay · step 012 of 64
offline render, Chrome 154, light scheme, 2 s of virtual time
runs in a sandboxed frame with no origin; live pages may fetch CDN fonts the offline render did not
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="color-scheme" content="light dark">
<title>Animated Circle - Interactive Demo</title>
<meta name="description" content="A responsive, accessible circle that changes color when clicked">
<style>
*,
*::before,
*::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
:root {
color-scheme: light dark;
--bg: #fff;
--text: #374151;
--fg: #2563eb;
--shadow: rgba(0, 0, 0, 0.1);
}
[data-color="red"] { --fg: #dc2626; }
[data-color="green"] { --fg: #16a34a; }
[data-color="amber"] { --fg: #d97706; }
[data-color="violet"] { --fg: #7c3aed; }
[data-color="cyan"] { --fg: #0891b2; }
@media (prefers-color-scheme: dark) {
:root {
--bg: #111;
--text: #d1d5db;
--fg: #93c5fd;
--shadow: rgba(0, 0, 0, 0.6);
}
[data-color="red"] { --fg: #fca5a5; }
[data-color="green"] { --fg: #86efac; }
[data-color="amber"] { --fg: #fcd34d; }
[data-color="violet"] { --fg: #c4b5fd; }
[data-color="cyan"] { --fg: #67e8f9; }
}
@media (prefers-contrast: more) {
:root {
--shadow: rgba(0, 0, 0, 0.9);
}
}
@media (forced-colors: active) {
svg circle {
stroke: CanvasText;
stroke-width: 2;
}
}
body {
min-height: 100dvh;
display: grid;
place-items: center;
padding: 1rem;
background: var(--bg);
color: var(--text);
font-family: system-ui, -apple-system, sans-serif;
}
main {
width: 100%;
display: flex;
flex-direction: column;
align-items: center;
text-align: center;
}
button {
display: block;
width: min(360px, 100%);
aspect-ratio: 1;
border: 0;
border-radius: 50%;
background: none;
color: var(--fg);
cursor: pointer;
touch-action: manipulation;
-webkit-tap-highlight-color: transparent;
transition: color 0.4s ease;
}
button:focus-visible {
outline: 3px solid var(--fg);
outline-offset: 8px;
}
svg {
display: block;
width: 100%;
height: 100%;
overflow: visible;
opacity: 0.9;
filter: drop-shadow(0 8px 16px var(--shadow));
transition: opacity 0.3s ease, color 0.4s ease;
}
svg circle {
transition: r 0.3s ease;
}
button:active svg,
button:focus-visible svg {
opacity: 1;
}
button.color-changed svg {
animation: pulse 0.5s ease-out;
}
@keyframes pulse {
0% {
filter: drop-shadow(0 8px 16px var(--shadow)) drop-shadow(0 0 20px var(--fg));
}
100% {
filter: drop-shadow(0 8px 16px var(--shadow));
}
}
@media (hover: hover) {
button:hover svg {
opacity: 1;
}
}
@media (prefers-reduced-motion: no-preference) {
svg {
transition:
transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
opacity 0.3s ease;
}
button:focus-visible svg {
transform: scale(1.05);
}
button:active svg {
transform: scale(0.97);
}
}
@media (hover: hover) and (prefers-reduced-motion: no-preference) {
button:hover:not(:active) svg {
transform: scale(1.05);
}
}
.status {
margin-top: 2rem;
font-weight: 600;
}
.hint {
margin-top: 0.25rem;
font-size: 0.875rem;
opacity: 0.8;
}
kbd {
display: inline-block;
padding: 0.125rem 0.375rem;
background: var(--shadow);
border-radius: 0.25rem;
font-family: monospace;
font-size: 0.75em;
}
</style>
</head>
<body>
<main>
<button type="button" aria-label="Change circle color" aria-describedby="status hint">
<svg viewBox="0 0 100 100" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg">
<circle cx="50" cy="50" r="50" fill="currentColor"/>
</svg>
</button>
<p class="status" id="status" role="status">Blue</p>
<p class="hint" id="hint">Click to change color (or press <kbd>Space</kbd>)</p>
</main>
<script>
const button = document.querySelector('button');
const status = document.querySelector('.status');
const colors = ['blue', 'red', 'green', 'amber', 'violet', 'cyan'];
const storageKey = 'circle-color';
const savedColor = localStorage.getItem(storageKey);
let index = Math.max(colors.indexOf(savedColor), 0);
function applyColor() {
const color = colors[index];
if (color === 'blue') {
delete button.dataset.color;
} else {
button.dataset.color = color;
}
status.textContent = color[0].toUpperCase() + color.slice(1);
localStorage.setItem(storageKey, color);
button.classList.add('color-changed');
button.addEventListener('animationend', () => {
button.classList.remove('color-changed');
}, { once: true });
}
applyColor();
function changeColor() {
index = (index + 1) % colors.length;
applyColor();
}
button.addEventListener('click', changeColor);
document.addEventListener('keydown', (e) => {
if ((e.code === 'Space' || e.code === 'Enter') && document.activeElement === button) {
e.preventDefault();
changeColor();
}
});
</script>
</body>
</html>
what changed from step 011
+40 / -3 lines
opacity: 0.9; filter: drop-shadow(0 8px 16px var(--shadow));- transition: opacity 0.3s ease;+ transition: opacity 0.3s ease, color 0.4s ease; }+ svg circle {+ transition: r 0.3s ease;+ } button:active svg, button:focus-visible svg { opacity: 1; }+ button.color-changed svg {+ animation: pulse 0.5s ease-out;+ }+ @keyframes pulse {+ 0% {+ filter: drop-shadow(0 8px 16px var(--shadow)) drop-shadow(0 0 20px var(--fg));+ }+ 100% {+ filter: drop-shadow(0 8px 16px var(--shadow));+ }+ } @media (hover: hover) { button:hover svg {⋯ line 141 margin-top: 0.25rem; font-size: 0.875rem;+ opacity: 0.8; }+ kbd {+ display: inline-block;+ padding: 0.125rem 0.375rem;+ background: var(--shadow);+ border-radius: 0.25rem;+ font-family: monospace;+ font-size: 0.75em;+ } </style> </head>⋯ line 161 </button> <p class="status" id="status" role="status">Blue</p>- <p class="hint" id="hint">Click, tap, or press Enter or Space to change the color</p>+ <p class="hint" id="hint">Click to change color (or press <kbd>Space</kbd>)</p> </main> <script>⋯ line 181 status.textContent = color[0].toUpperCase() + color.slice(1); localStorage.setItem(storageKey, color);+ + button.classList.add('color-changed');+ button.addEventListener('animationend', () => {+ button.classList.remove('color-changed');+ }, { once: true }); } applyColor(); - button.addEventListener('click', () => {+ function changeColor() { index = (index + 1) % colors.length; applyColor();+ }+ + button.addEventListener('click', changeColor);+ + document.addEventListener('keydown', (e) => {+ if ((e.code === 'Space' || e.code === 'Enter') && document.activeElement === button) {+ e.preventDefault();+ changeColor();+ } }); </script>
What the model said
Done! Here are the improvements I made to your HTML: **Key enhancements:** 1. **Pulse animation** - Added a glowing pulse effect when the color changes, making the interaction more satisfying 2. **Better keyboard support** - Added explicit spacebar/Enter handling with proper event prevention 3. **Improved hint text** - Now shows `Space` in a styled `<kbd>` element for better visibility 4. **Semantic HTML** - Used `<kbd>` for keyboard shortcuts 5. **Code organization** - Extracted the color change logic into a `changeColor()` function to avoid duplication 6. **Animation cleanup** - Automatically removes the animation class after it completes The circle now has visual feedback when you click it or press spacebar—it emits a subtle glow that fades out. The hint text is also cleaner and more keyboard-friendly.