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HTML <noscript> Tag

Example

Use of the <noscript> tag:

<script type="text/javascript">
document.write("Hello World!")
</script>
<noscript>Your browser does not support JavaScript!</noscript>

Try it yourself »

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The <noscript> tag is supported in all major browsers.

Definition and Usage

The <noscript> tag is used to provide an alternate content for users that have disabled scripts in their browser or have a browser that doesn’t support client-side scripting.

The <noscript> element can contain all the elements that you can find inside the <body> element of a normal HTML page.

The content inside the <noscript> element will only be displayed if scripts are not supported, or are disabled in the user’s browser.

Tips and Notes

Tip: It is also a good practice to use the comment tag to "hide" scripts from browsers without support for client-side scripts (so they don't show them as plain text):

<script type="text/javascript">
<!--
function displayMsg()
{
alert("Hello World!")
}
//-->
</script> 

Differences Between HTML and XHTML

NONE

Standard Attributes

DTD indicates in which HTML 4.01/XHTML 1.0 DTD the attribute is allowed. S=Strict, T=Transitional, and F=Frameset.

The <noscript> tag supports the following standard attributes:

Attribute Value Description DTD
class classname Specifies a classname for an element STF
dir rtl
ltr		 Specifies the text direction for the content in an element STF
id id Specifies a unique id for an element STF
lang language_code Specifies a language code for the content in an element STF
style style_definition Specifies an inline style for an element STF
title text Specifies extra information about an element STF
xml:lang language_code Specifies a language code for the content in an element, in XHTML documents STF

More information about Standard Attributes.

Event Attributes

According to the W3C standard, the <noscript> tag supports event attributes. However, since the noscript element is used to provide an alternate content for users that have disabled scripts, we cannot see any use for this.

Attribute Value Description DTD
onclick script Script to be run on a mouse click STF
ondblclick script Script to be run on a mouse double-click STF
onmousedown script Script to be run when mouse button is pressed STF
onmousemove script Script to be run when mouse pointer moves STF
onmouseout script Script to be run when mouse pointer moves out of an element STF
onmouseover script Script to be run when mouse pointer moves over an element STF
onmouseup script Script to be run when mouse button is released STF
onkeydown script Script to be run when a key is pressed STF
onkeypress script Script to be run when a key is pressed and released STF
onkeyup script Script to be run when a key is released STF

More information about Event Attributes.

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