toLowerCase() 函式会回传将字符串转换为英文小写字母后的结果。
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语法
str.toLowerCase()回传值
回传一组将原字串英文内容转换成英文小写字母后的结果。
描述
The toLowerCase() 函式会回传一组将原字符串英文内容转换成英文小写字母后的结果。 toLowerCase() 并不会影响到原字符串 str 的内容值。
范例
使用toLowerCase()
console.log('ALPHABET'.toLowerCase()); // 'alphabet'
规范
| 规范 | 状态 | 注解 |
|---|---|---|
| ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
| ECMAScript 5.1 (ECMA-262) The definition of 'String.prototype.toLowerCase' in that specification. |
Standard | |
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'String.prototype.toLowerCase' in that specification. |
Standard | |
| ECMAScript (ECMA-262) The definition of 'String.prototype.toLowerCase' in that specification. |
Living Standard |
浏览器相容性
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