firstChild and lastChild methods under DOM Traversing methods
<!DOCTYPE html>
<html lang="en" id="hello">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Test Page</title>
<script src="main.js"></script>
</head>
<body>
<div id="outer">
<h1 id="selector" style="border: 2px solid dodgerblue; padding : 2px"> RUSTIC TRAVEL JUNKIE</h1>
<p id="para">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Illum ipsam blanditiis voluptatibus et, cumque expedita, quam ea! Dolorem obcaecati, fuga, culpa neque, repellat laudantium libero sed sint veritatis praesentium vitae cumque ratione eveniet optio, aspernatur ab. </p>
<button id="inner">CLICK ME</button>
</div>
<script>
var a = document.getElementById('outer').firstChild;
console.log(a);
var b = document.getElementById('outer').lastChild;
console.log(b);
</script>
</body>
</html>
<html lang="en" id="hello">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Test Page</title>
<script src="main.js"></script>
</head>
<body>
<div id="outer">
<h1 id="selector" style="border: 2px solid dodgerblue; padding : 2px"> RUSTIC TRAVEL JUNKIE</h1>
<p id="para">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Illum ipsam blanditiis voluptatibus et, cumque expedita, quam ea! Dolorem obcaecati, fuga, culpa neque, repellat laudantium libero sed sint veritatis praesentium vitae cumque ratione eveniet optio, aspernatur ab. </p>
<button id="inner">CLICK ME</button>
</div>
<script>
var a = document.getElementById('outer').firstChild;
console.log(a);
var b = document.getElementById('outer').lastChild;
console.log(b);
</script>
</body>
</html>
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