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How to introduce external js into html

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Release： 2024-04-11 06:18:32

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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.

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> tag

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

<code class="html"><script src="path/to/script.js"></script></code>

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Specifies the type attribute (optional)

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

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

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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.

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

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Place <script> tag

##Usually,

Just add an additional

Note:

Make sure the URL of the external JS file is correct and the script file is accessible.

Script files should end with the
extension. If the script depends on other scripts, make sure they are loaded in the correct order.

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