Web/JavaScript/Reference/Global objects/String/toLowerCase
The toLowerCase() method returns the calling string value converted to lower case.
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Syntax
str.toLowerCase()
Return value
A new string representing the calling string converted to lower case.
Description
The toLowerCase() method returns the value of the string converted to lower case. toLowerCase() does not affect the value of the string str itself.
Examples
Using toLowerCase()
console.log('ALPHABET'.toLowerCase()); // 'alphabet'Specifications
| Specification |
|---|
| ECMAScript (ECMA-262)The definition of 'String.prototype.toLowerCase' in that specification. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | Server | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
toLowerCase
|
Chrome
Full support 1 |
Edge
Full support 12 |
Firefox
Full support 1 |
IE
Full support 3 |
Opera
Full support 3 |
Safari
Full support 1 |
WebView Android
Full support 1 |
Chrome Android
Full support 18 |
Firefox Android
Full support 4 |
Opera Android
Full support 10.1 |
Safari iOS
Full support 1 |
Samsung Internet Android
Full support 1.0 |
nodejs
Full support 0.1.100 |
Legend
- Full support
- Full support
See also
String.prototype.toLocaleLowerCase()String.prototype.toLocaleUpperCase()String.prototype.toUpperCase()
String.prototype.toLowerCase() by Mozilla Contributors is licensed under CC-BY-SA 2.5.
