W3cubDocs

/JavaScript

string.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

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
sub 1 12 1 3 3 1
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
sub 1 18 4 10.1 1 1.0
Server
Node.js
sub 0.1.100

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/sub