Given an HTML document, the challenge is to use JavaScript to modify the element's ID. Below are two strategies that are covered:

Method 1: Using JavaScript, we may modify the ID by utilizing the id property.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>AmarCode</title>
    <style>
        .div {
            height: 100px;
            width: 200px;
            margin: 0 auto;
            color: white;
        }

        #div1 {
            background: green;
        }

        #div2 {
            background: blue;
        }
    </style>
</head>
<body style="text-align:center;">

<h1 style="color:green;">
    Amar Code
</h1>

<p id="GFG_UP"></p>

<div class="div" id="div1"></div>
<br>

<button onClick="GFG_Fun()">
    click here
</button>

<script>
    var el_up = document.getElementById('GFG_UP');
    el_up.innerHTML = "Click on button to "
        + "change the ID of box.";

    function GFG_Fun() {
        document.getElementById('div1').id = 'div2';
    }
</script>
</body>
</html>

Method 2: Using JavaScript, we may modify the ID by using the id property located inside the element.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>AmarCode</title>
    <style>
        .div {
            height: 100px;
            width: 200px;
            margin: 0 auto;
            color: white;
        }

        #div1 {
            background: green;
        }

        #div2 {
            background: blue;
        }
    </style>
</head>
<body style="text-align:center;">

<h1 style="color:green;">
    AmarCode
</h1>

<p id="GFG_UP"></p>

<div class="div" id="div1"></div>
<br>

<button onclick="document.getElementById(
        'div1').id = 'div2'; return false">
    click here
</button>

<script>
    var el_up =
        document.getElementById('GFG_UP');

    el_up.innerHTML = "Click on button to"
        + " change the ID of box.";
</script>
</body>
</html>







Tag
JavaScript
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