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!
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) |