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<!DOCTYPE html>
<html lang="en">
<head>
<title>Dom (Document Object Model)</title>
</head>
<body>
<div align="center">
<h1 id="a">Introduction</h1>
<h2 class="b">Chapter</h2>
<h3>Thank you</h3>
</div>
<script>
document.getElementById("a").innerHTML="This is modified by dom selectors" //for Id name, the priority will be given to modified data
document.getElementsByClassName("b")[0].innerHTML="Introduction on DOM" //for class name, the priority is given to the data which is already stored so we use the index value
document.getElementsByTagName("h3")[0].innerHTML="End"
//same as class name
function c(){
document.getElementById('a').innerHTML="Welcome to the class"
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"
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</script>
<div align="center">
<h1 id="d">Hello all</h1><br><br>
<p id="e"></p>
<button onmouseenter="c()">Click here!</button>
<!-- Dom Events -> an action that occurs as a result of change of the elements in the DOM tree -->
</div>
<script>
function c(){
document.getElementById("d").innerHTML="Introduction to DOM"
}
function d
</script>
</body>
</html>