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How to introduce external js into html

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Apr 11, 2024 am 06:18 AM

Asynchronous loading

To include an external JS file in HTML, use the <script> tag and specify the URL of the file to load. You can also specify type, defer, or async attributes to control how loading and execution occur. Typically, the <script> tag should be placed at the bottom of the <body> section to avoid blocking page rendering. </script>

How to introduce external js into html

How to introduce external JS in HTML

Introducing external JS files into HTML is a common practice , which allows you to organize JavaScript code into separate files and easily reuse them across multiple pages. Here's how to import an external JS file:

Use <script></script> tag

Use tag to introduce external JS files. The src attribute of this tag specifies the URL of the script file to be loaded:

<script src="path/to/script.js"></script>

Specifies the type attribute (optional)

To explicitly specify the type of file being loaded, you can use the type attribute:

<script src="path/to/script.js" type="text/javascript"></script>

Specify defer or async attributes (optional)

defer and async attributes are used to control script loading and execution Method:

defer: Indicates that the script can be loaded after the page parsing is completed, but will be executed before the DOMContentLoaded event is triggered.
async: Indicates that the script can be loaded and executed asynchronously and is not affected by page parsing or DOMContentLoaded events.

<script src="path/to/script.js" defer></script>
<script src="path/to/script.js" async></script>

Place <script></script> tag

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