External JavaScript

How to create .js file?

Create a file and save with .js extension.

Write javascript code in this file.

Do not write <script> tag and other html tag in .js file.

Syntax

fileName.js


How to use .js file?

Syntax

<script src="path or url " > </script>

example:
<script src="message.js" > </script>


Advantages of External JavaScript

It helps in the reusability of code in more than one HTML file.

It allows easy code readability.

It is time-efficient as web browsers cache the external js files, which further reduces the page loading time.

The .js file reduces the code complexity.


Disadvantages of External JavaScript

Code stealer can download your code using the url of the .js file.


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