String.prototype.toLowerCase()

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

浏览器相容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

参考

• String.prototype.toLocaleLowerCase()
• String.prototype.toLocaleUpperCase()
• String.prototype.toUpperCase()