<div class="heatmap-card">
<h3>Contribution Activity</h3>
<div class="heatmap-grid" id="heatmap-grid"></div>
<div class="heatmap-legend">
<span>Less</span>
<div class="legend-box level-0"></div>
<div class="legend-box level-1"></div>
<div class="legend-box level-2"></div>
<div class="legend-box level-3"></div>
<div class="legend-box level-4"></div>
<span>More</span>
</div>
</div>
*, *::before, *::after {
box-sizing: border-box;
}
body {
font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
background: #f9fafb;
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
margin: 0;
padding: 20px;
}
.heatmap-card {
background: #ffffff;
padding: 30px;
border-radius: 12px;
box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
overflow-x: auto;
}
.heatmap-card h3 {
margin-top: 0;
margin-bottom: 20px;
color: #111827;
font-size: 1.125rem;
}
.heatmap-grid {
display: grid;
grid-auto-flow: column;
grid-template-rows: repeat(7, 1fr);
gap: 4px;
}
.heat-box, .legend-box {
width: 14px;
height: 14px;
border-radius: 3px;
background-color: #ebedf0;
}
.level-1 { background-color: #9be9a8; }
.level-2 { background-color: #40c463; }
.level-3 { background-color: #30a14e; }
.level-4 { background-color: #216e39; }
.heatmap-legend {
display: flex;
align-items: center;
justify-content: flex-end;
gap: 6px;
margin-top: 20px;
font-size: 0.875rem;
color: #6b7280;
}
const grid = document.getElementById("heatmap-grid");
for (let i = 0; i < 365; i++) {
const box = document.createElement("div");
box.className = "heat-box";
const randomValue = Math.random();
if (randomValue > 0.9) {
box.classList.add("level-4");
} else if (randomValue > 0.7) {
box.classList.add("level-3");
} else if (randomValue > 0.4) {
box.classList.add("level-2");
} else if (randomValue > 0.2) {
box.classList.add("level-1");
}
grid.appendChild(box);
}
