String.prototype.toString() - JavaScript 编辑

概述

toString() 方法返回指定对象的字符串形式。

语法

str.toString()

返回值

一个表示调用对象的字符串。

描述

String 对象覆盖了Object 对象的 toString 方法；并没有继承 Object.toString()。对于 String 对象，toString 方法返回该对象的字符串形式，和 String.prototype.valueOf() 方法返回值一样。

示例

例子：使用 toString

下例输出一个字符串对象（String object）的字符串值：

var x = new String("Hello world");

alert(x.toString())      // 输出 "Hello world"

规范

Specification	Status	Comment
ECMAScript 3rd Edition (ECMA-262)	Standard	Initial definition. Implemented in JavaScript 1.1.
ECMAScript 5.1 (ECMA-262) String.prototype.toString	Standard
ECMAScript 2015 (6th Edition, ECMA-262) String.prototype.toString	Standard
ECMAScript Latest Draft (ECMA-262) String.prototype.toString	Draft

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!

• Desktop
• Mobile

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

• Object.prototype.toSource()
• String.prototype.valueOf()