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The toLocaleUpperCase()
method returns the calling string value converted to upper case, according to any locale-specific case mappings.
Syntax
str.toLocaleUpperCase()
Return value
A new string representing the calling string converted to upper case, according to any locale-specific case mappings.
Description
The toLocaleUpperCase()
method returns the value of the string converted to upper case according to any locale-specific case mappings. toLocaleUpperCase()
does not affect the value of the string itself. In most cases, this will produce the same result as toUpperCase()
, but for some locales, such as Turkish, whose case mappings do not follow the default case mappings in Unicode, there may be a different result.
Examples
Using toLocaleUpperCase()
console.log('alphabet'.toLocaleUpperCase()); // 'ALPHABET'
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 3rd Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.2. |
ECMAScript 5.1 (ECMA-262) The definition of 'String.prototype.toLocaleUpperCase' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'String.prototype.toLocaleUpperCase' in that specification. |
Standard | |
ECMAScript 2017 Draft (ECMA-262) The definition of 'String.prototype.toLocaleUpperCase' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |