<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
// ID NAvigation through JS
let a = document.getElementById('nav');
console.log(a);
// Class Navigation through JS
let b = document.getElementsByClassName('box');
console.log(b)
// query selector
let c = document.querySelectorAll('nav');
console.log("this is my query selector=",c);
</script>
</head>
<body>
<div id="div1" class="box">
<ul id="nav">
<li>line1</li>
<li>line2</li>
<li>line3</li>
<li>line4</li>
</ul>
</div>
<div class="box">
Reusing classs
</div>
</body>
</html>
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