TAG
JavaScript
Result
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License
<h1>Hello</h1>
window.addEventListener("load", function() { var elStyle = document.createElement("style"); document.querySelector("head").appendChild(elStyle); elStyle.sheet.insertRule(".test{ border-bottom: 1px solid #CCC; color: #FF0000; }", 0); document.querySelector("h1").classList.add("test"); });
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License
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by DevDic
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