Boolean.prototype.toString()

toString() 方法返回指定的布尔对象的字符串形式。

语法

bool.toString()

返回值

表示特定Boolean对象的字符串。

描述

Object.prototype.toString()。对于布尔对象,toString 方法返回该对象的字符串形式。

当一个Boolean对象作为文本值或进行字符串连接时,JavaScript 会自动调用其 toString 方法。

对于Boolean对象或值,内置的 toString 方法返回字符串 "true" 或 "false",具体返回哪个取决于布尔对象的值。

示例

使用 toString

下面的代码,flag.toString 返回 "true":

var flag = new Boolean(true)
var myVar = flag.toString()

规范

Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition.
ECMAScript 5.1 (ECMA-262)
Boolean.prototype.toString
Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
Boolean.prototype.toString
Standard  
ECMAScript Latest Draft (ECMA-262)
Boolean.prototype.toString
Draft  

浏览器兼容

Update compatibility data on GitHub
Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet Node.js
toString Chrome Full support 1 Edge Full support 12 Firefox Full support 1 IE Full support 3 Opera Full support Yes Safari Full support Yes WebView Android Full support 1 Chrome Android Full support 18 Firefox Android Full support 4 Opera Android Full support Yes Safari iOS Full support Yes Samsung Internet Android Full support 1.0 nodejs Full support Yes

Legend

Full support  
Full support

相关链接