<section>
<h3>CSS padding-top</h3>
<div class="container" data-aspect="padding-top">
<div class="box">
<img src="https://picsum.photos/900/508?random=2" alt="">
</div>
</div>
<p style="text-align: right">Press and hold me to drag left or right</p>
</section>
<section>
<h3>CSS Variables</h3>
<div class="container" data-aspect="CSS Variables" id="box">
<img src="https://picsum.photos/900/508?random=4" alt="">
</div>
<p style="text-align: right">Press and hold me to drag left or right</p>
</section>
<section>
<h3>CSS aspect-ratio</h3>
<div class="container" data-aspect="aspect-ratio">
<img src="https://picsum.photos/900/508?random=6" alt="">
</div>
<p style="text-align: right">Press and hold me to drag left or right</p>
</section>
@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
img {
display: block;
vertical-align: top;
}
body {
width: 100vw;
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
gap: 20px;
font-family: "Exo", Arial, sans-serif;
background-color: #f7f7f7;
padding: 20px;
}
section {
max-width: 40vw;
margin: 0 auto;
flex: 1;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
gap: 10px;
box-shadow: 0 0 0 6px rgb(0 0 0 / 13%);
border-radius: 6px;
padding: 10px 0;
}
p {
width: 100%;
padding-right: 5px;
font-size: 14px;
color: #666;
}
.container {
border: 1px dashed #f36;
border-radius: 1px;
width: 100%;
position: relative;
aspect-ratio: 16 / 9;
overflow: hidden;
resize: horizontal;
}
.container[data-aspect="padding-top"] .box {
height: 0;
padding-top: 56.25%;
width: 100%;
position: relative;
}
.container[data-aspect="padding-top"] img {
position: absolute;
top: 0;
left: 0;
width: 100%;
}
.container[data-aspect="CSS Variables"] img {
--ratio: 16/9;
height: calc(var(--width) * 1 / (var(--ratio)));
width: 100%;
}
.container[data-aspect="aspect-ratio"] img {
width: 100%;
aspect-ratio: 16 / 9;
}
var ro = new ResizeObserver((entries) => {
for (let entry of entries) {
const cr = entry.contentRect;
entry.target.style.setProperty("--width", `${cr.width + 2}px`);
}
});
const box = document.getElementById("box");
ro.observe(box);
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