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click-grid-to-expand.html
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click-grid-to-expand.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Improved Interactive CSS Grid Layout with Symmetric Animation</title>
<style>
body {
font-family: Arial, sans-serif;
}
.grid-container {
display: grid;
grid-template-columns: repeat(4, 1fr);
grid-template-rows: repeat(2, 100px);
gap: 10px;
padding: 10px;
background-color: #f0f0f0;
width: 800px;
height: 210px;
position: relative;
}
.grid-item {
background-color: #ffffff;
border: 2px solid #333;
border-radius: 10px;
display: flex;
justify-content: center;
align-items: center;
font-size: 16px;
font-weight: bold;
text-align: center;
}
.item1 {
grid-column: span 2;
grid-row: span 2;
background-color: #ffcccb;
}
.item2 {
grid-column: span 1;
grid-row: span 2;
background-color: #c1e1c1;
cursor: pointer;
}
.item3 {
grid-column: span 1;
grid-row: span 1;
background-color: #add8e6;
}
.item4 {
grid-column: span 1;
grid-row: span 1;
background-color: #fffacd;
}
.expanded-overlay {
position: absolute;
background-color: #c1e1c1;
border: 2px solid #333;
border-radius: 10px;
display: flex;
justify-content: center;
align-items: center;
font-size: 16px;
font-weight: bold;
text-align: center;
cursor: pointer;
transition: all 0.5s ease;
}
</style>
</head>
<body>
<div class="grid-container" id="gridContainer">
<div class="grid-item item1">2x2</div>
<div class="grid-item item2" id="expandable">1x2<br>(Click to expand)</div>
<div class="grid-item item3">1x1</div>
<div class="grid-item item4">1x1</div>
</div>
<script>
const gridContainer = document.getElementById('gridContainer');
const expandable = document.getElementById('expandable');
let isExpanded = false;
let overlay;
let originalRect;
function createOverlay(element) {
originalRect = element.getBoundingClientRect();
const containerRect = gridContainer.getBoundingClientRect();
overlay = document.createElement('div');
overlay.className = 'expanded-overlay';
overlay.textContent = 'Expanded!\nClick to shrink';
overlay.style.left = `${originalRect.left - containerRect.left}px`;
overlay.style.top = `${originalRect.top - containerRect.top}px`;
overlay.style.width = `${originalRect.width}px`;
overlay.style.height = `${originalRect.height}px`;
gridContainer.appendChild(overlay);
// Force reflow
overlay.offsetHeight;
// Animate to full size
overlay.style.left = '0';
overlay.style.top = '0';
overlay.style.width = '100%';
overlay.style.height = '100%';
overlay.addEventListener('click', toggleExpansion);
}
function removeOverlay() {
if (overlay) {
const containerRect = gridContainer.getBoundingClientRect();
// Animate back to original size
overlay.style.left = `${originalRect.left - containerRect.left}px`;
overlay.style.top = `${originalRect.top - containerRect.top}px`;
overlay.style.width = `${originalRect.width}px`;
overlay.style.height = `${originalRect.height}px`;
// Remove overlay after animation completes
overlay.addEventListener('transitionend', function handler() {
overlay.removeEventListener('transitionend', handler);
overlay.removeEventListener('click', toggleExpansion);
gridContainer.removeChild(overlay);
overlay = null;
expandable.style.visibility = 'visible';
});
}
}
function toggleExpansion() {
if (!isExpanded) {
expandable.style.visibility = 'hidden';
createOverlay(expandable);
} else {
removeOverlay();
}
isExpanded = !isExpanded;
}
expandable.addEventListener('click', toggleExpansion);
</script>
</body>
</html>