String.prototype.toLowerCase()
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,表示转换为小写的调用字符串。
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 (ECMA-262) String.prototype.toLowerCase |
Living Standard | |
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