How to write html external link js code-HTML Tutorial-php.cn

How to write html external link js code

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Release： 2024-04-11 06:41:31

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In HTML, you can embed external JavaScript code by specifying the src attribute in the <script> tag. Create external JavaScript files and write code. Use the <script> tag in the <head> or <body> section of your HTML document to link to an external JavaScript file. Write code in an external JavaScript file, such as defining functions or objects. Using external JavaScr in HTML documents by calling functions or methods in external JavaScript files

How to write html external link js code

Writing of HTML external JavaScript code

How to write HTML external JavaScript code?

To embed external JavaScript code in HTML, you need to use the <script> tag. The <script> tag has a src attribute that points to the location of an external JavaScript file.

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

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Writing steps

1. Create an external JavaScript file

Use a text editor or code editor to create one A new JavaScript file, such as "external.js". Write JavaScript code to this file.

2. Link external JavaScript files

in the <head> or <body> section of the HTML document , use the <script> tag to link to an external JavaScript file.

<code class="html"><head>
  <script src="external.js"></script>
</head></code>

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3. Write JavaScript code

In an external JavaScript file, write your JavaScript code. You can define functions, objects, variables and other blocks of code.

For example:

<code class="javascript">// external.js
function greet() {
  alert("Hello world!");
}</code>

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4. Calling external JavaScript code

Once the external JavaScript file is linked, you can Use it by calling a function or method in the file.

<code class="html"><button onclick="greet()">Click Me</button></code>

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Note:

Make sure the path to the external JavaScript file is correct. The
<script> tag should be placed in the <head> or <body> section of the document.
If you don't want to block the loading of the page, you can use the async or defer attribute.

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