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How to use id attribute to specify a unique id for HTML element in JavaScript and CSS style

1 Answer

<html>
<head>
<style>
    #h1_id {
      background-color: black;
      color: yellow;
      padding: 10px;
      text-align: center;
    } 
</style>
</head>
<body>
 
<h1 id="h1_id">HTML CSS</h1>

<button onclick="changeH1()">Click</button>

<script>
function changeH1() {
  document.getElementById("h1_id").innerHTML = "JavaScript";
}
</script>
 
</body>
</html>

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answered Dec 24, 2018 by avibootz

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