String.prototype.sub()

Deprecated
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. 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 Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'String.prototype.sub' in that specification.
Standard Initial definition. Implemented in JavaScript 1.0. Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers.
ECMAScript Latest Draft (ECMA-262)
The definition of 'String.prototype.sub' in that specification.
Draft Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers.

Browser compatibility

FeatureChromeFirefoxEdgeInternet ExplorerOperaSafari
Basic Support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)

See also

Document Tags and Contributors

 Last updated by: fscholz,