CSS background-size Property - Playground Example

<!DOCTYPE html><html><head><style type="text/css">:root {
    --img: url("https://images.unsplash.com/photo-1501785888041-af3ef285b470?auto=format&fit=crop&w=800&q=80");
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    margin: 24px;
    background: #f7f7f8;
    color: #111;
}

.container {
    max-width: 960px;
    margin: 0 auto;
}

h1 {
    font-size: 20px;
    margin-bottom: 16px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.preview {
    height: 140px;
    background-image: var(--img);
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.cover .preview {
    background-size: cover;
}

.contain .preview {
    background-size: contain;
    background-color: #222;
}

.auto .preview {
    background-size: auto;
    background-color: #444;
}

.custom .preview {
    background-size: 150px 50%;
    background-color: #333;
}

figcaption {
    padding: 12px 16px;
    font-size: 13px;
    color: #555;
}
</style></head><body><div class="container">
    <h1>background-size examples</h1>

    <div class="grid">
        <figure class="card cover">
            <div class="preview">Cover</div>
            <figcaption>background-size: cover;</figcaption>
        </figure>

        <figure class="card contain">
            <div class="preview">Contain</div>
            <figcaption>background-size: contain;</figcaption>
        </figure>

        <figure class="card auto">
            <div class="preview">Auto</div>
            <figcaption>background-size: auto;</figcaption>
        </figure>

        <figure class="card custom">
            <div class="preview">150px 50%</div>
            <figcaption>background-size: 150px 50%;</figcaption>
        </figure>
    </div>
</div></body></html>