HTML script

JavaScript makes HTML pages more dynamic and interactive.

Online Instance

How to insert a script into an HTML document.

How to deal with browsers that do not support scripts or have scripts disabled .

HTML <script> tag

The <script> tag is used to define client-side scripts, such as JavaScript.

The <script> element can contain script statements or point to external script files through the src attribute.

JavaScript is most commonly used for image manipulation, form validation, and dynamic content updates.

The following script will output “Hello World!” to the browser:

<script> document.write("Hello World!"); </script>

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HTML <noscript> tag

The <noscript> tag provides alternative content when scripts cannot be used, such as when scripts are disabled in the browser or when the browser does not support client-side scripts.

The <noscript> element can contain all the elements found in the body element of a normal HTML page.

The content within the <noscript> element will only be displayed if the browser does not support scripts or has scripts disabled:

<script> document.write("Hello World!") </script> <noscript>抱歉，你的浏览器不支持 JavaScript!</noscript>

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JavaScript experience (from this site’s JavaScript tutorial)

JavaScript example code:

JavaScript can be output directly in HTML:

document.write("<p>This is a paragraph.</p>");

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JavaScript event response:

<button type="button" onclick="myFunction()">Click me!</button>

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JavaScript processes HTML styles:

document.getElementById("demo").style.color="#ff0000";

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HTML script tag