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JavaScript Objects

JavaScript Reference Manual

JS DOM Reference Manual

JavaScript toUpperCase() Method

　JavaScript String Object

toUpperCase()The method converts the string to uppercase.

Syntax:

string.toUpperCase()
var　str1　=　"www.oldtoolbag.com";
var　str2　=　str1.toUpperCase();
Test See‹/›

Browser Compatibility

All browsers fully support the toUpperCase() method:

Method
toUpperCase()YesYesYesYesYes

Technical Details

Return Value:Represents the string converted to uppercase
JavaScript Version:ECMAScript 1

　JavaScript String Object

JavaScript RegExp (RegExp) ObjectJavaScript String Object