We're looking for a user researcher to understand the needs of developers and designers. Is this you or someone you know? Check out the post: https://mzl.la/2IGzdXS

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"
 

规范

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  

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

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)

相关链接

文档标签和贡献者

此页面的贡献者: xgqfrms-GitHub, helloguangxue, yenshen, teoli, AlexChao, ziyunfei
最后编辑者: xgqfrms-GitHub,