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<html><head><style>#myDIV { text-decoration: underline; text-underline-offset: 0.5em;}</style></head><body><h1>Change text-underline-offset with JavaScript</h1><div id="myDIV">Hello world!</div><p>Click the "Try it" button to change the text-underline-offset of the div.</p><button onclick="myFunction()">Try it</button><script>function myFunction() { document.getElementById("myDIV").style.textUnderlineOffset = "1em";}</script></body></html>