toLowerCase()
会将调用该方法的字符串值转为小写形式,并返回。
语法
str.toLowerCase()
返回值
一个新的字符串,表示串转换为小写的调用字符。
描述
toLowerCase
会将调用该方法的字符串值转为小写形式,并返回。toLowerCase
不会影响字符串本身的值。
示例
例子:使用 toLowerCase()
console.log('中文简体 zh-CN || zh-Hans'.toLowerCase()); // 中文简体 zh-cn || zh-hans console.log( "ALPHABET".toLowerCase() ); // "alphabet"
说明
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
ECMAScript 5.1 (ECMA-262) String.prototype.toLowerCase |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) String.prototype.toLowerCase |
Standard | |
ECMAScript Latest Draft (ECMA-262) String.prototype.toLowerCase |
Draft | |
浏览器兼容性
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Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
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Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
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Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |