Programming Example

How to Use External JavaScript

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💻 Practical Program

📘 Step by Step Learning

In this section you will learn about How to Use External JavaScript.

Information & Algorithm

1. Create your html file in a folder.
2. Create you external javascript file "myScript.js" in the same folder.
3. Add this code in your HTML file.


<script src="myScript.js"></script>

Program Code

<!DOCTYPE html>
<html>
<body>

<h2>Use of External JavaScript</h2>

<p id="demo">This is a Paragraph.</p>

<button type="button" onclick="myFunction()">Try it</button>

<p>(myFunction is stored in an external file called "ExternalScript.js")</p>

<script src="myScript.js"></script>

</body>
</html>


myScript.js
----------------------

function myFunction() {
  document.getElementById("demo").innerHTML = "Paragraph changed.";
}

Output

Run Above Code

Explanation

How to learn from this program

First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.

Practice suggestion

After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.