Boolean.prototype
Boolean.prototype?属性表示Boolean?构造函数的原型。
| Boolean.prototype属性的属性特性： |
|:----|
| Writable | no |
| Enumerable | no |
| Configurable | no |
描述
属性
Boolean.prototype.constructor返回创建了实例原型的函数。默认为Boolean函数。
方法
Boolean.prototype.toSource()返回包含Boolean对象源码的字符串；你可以使用这个字符串来创建一个等价的对象。覆盖了Object.prototype.toSource()方法。
Boolean.prototype.toString()根据对象的值来返回一个字符串："true"或"false"。覆盖了Object.prototype.toString()方法。
Boolean.prototype.valueOf()返回Boolean对象的原始值。覆盖了Object.prototype.valueOf()方法。
规范
Specification | Status | Comment |
|---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.0. |
ECMAScript 5.1 (ECMA-262)The definition of 'Boolean.prototype' in that specification. | Standard | ? |
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'Boolean.prototype' in that specification. | Standard | ? |
ECMAScript Latest Draft (ECMA-262)The definition of 'Boolean.prototype' in that specification. | Living Standard | ? |
浏览器兼容性
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
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