String.prototype.sub()

Deprecated
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The sub() method creates a <sub> HTML element that causes a string to be displayed as subscript.

Syntax

str.sub()

Return value

A string containing a <sub> HTML element.

Description

The sub() method embeds a string in a <sub> tag: "<sub>str</sub>".

Examples

Using sub() and sup() methods

The following example uses the sub() and sup() methods to format a string:

var superText = 'superscript';
var subText = 'subscript';

console.log('This is what a ' + superText.sup() + ' looks like.');
// This is what a <sup>superscript</sup> looks like

console.log('This is what a ' + subText.sub() + ' looks like.');
// This is what a <sub>subscript</sub> looks like.

Specifications

Specification
ECMAScript (ECMA-262)
The definition of 'String.prototype.sub' in that specification.

Browser compatibility

DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
sub
Deprecated
Chrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100

Legend

Full support
Full support
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also