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<html><head><style>#DIV1 { height: 200px; width: 200px; margin: auto; border: 1px solid black; position: relative;}#DIV2 { width: 150px; border: 1px solid black; background-color: coral; aspect-ratio: 1;}#DIV2original { position: absolute; z-index: -1; opacity: 0.5; width: 150px; border: 1px dashed grey; background-color: lightgrey; aspect-ratio: 1;}</style></head><body><h1>Change aspect-ratio property with JavaScript</h1><p>Click the "Try it" button to set new aspect-ratio property "16/9":</p><p><b>Note: </b>The grey DIV element indicates original aspect-ratio of DIV2 element.</p><button onclick="myFunction()">Try it</button><div id="DIV1">DIV1 <div id="DIV2original">DIV2</div> <div id="DIV2">DIV2</div></div><script>function myFunction() {