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<!DOCTYPE html>
<html>
<head>
<script>
// JavaScript code can be placed here or in an external file
// For example:
function greet() {
alert("Hello, World!");
}
</script>
</head>
<body>
<h1>JavaScript in HTML</h1>
<button onclick="greet()">Click Me!</button>
</body>
</html>
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// this how add javascript file in html !!
<script type="text/javascript" src="yourJavascript.js"></script>
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<!-- include an external javascript document -->
<script src="myJavaScript.js" charset="utf-8"></script>
<!-- JavaScript inside html element -->
<script>
console.log("This is JavaScript");
</script>
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<script>
document.getElementById("demo").innerHTML = "Hello JavaScript!";
</script>
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<!DOCTYPE html>
<html>
<head>
<title>JavaScript in HTML</title>
<script>
// JavaScript code goes here
function greet() {
var name = prompt("Enter your name:"); // Prompt user for name input
alert("Hello, " + name + "!"); // Display greeting
}
</script>
</head>
<body>
<button onclick="greet()">Click Me</button>
</body>
</html>