From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- .../global_objects/boolean/tostring/index.html | 87 ++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 files/zh-cn/web/javascript/reference/global_objects/boolean/tostring/index.html (limited to 'files/zh-cn/web/javascript/reference/global_objects/boolean/tostring') diff --git a/files/zh-cn/web/javascript/reference/global_objects/boolean/tostring/index.html b/files/zh-cn/web/javascript/reference/global_objects/boolean/tostring/index.html new file mode 100644 index 0000000000..6245e953dc --- /dev/null +++ b/files/zh-cn/web/javascript/reference/global_objects/boolean/tostring/index.html @@ -0,0 +1,87 @@ +--- +title: Boolean.prototype.toString() +slug: Web/JavaScript/Reference/Global_Objects/Boolean/toString +tags: + - Boolean + - JavaScript + - Method + - Prototype +translation_of: Web/JavaScript/Reference/Global_Objects/Boolean/toString +--- +
{{JSRef}}
+ +

toString() 方法返回指定的布尔对象的字符串形式。

+ +
{{EmbedInteractiveExample("pages/js/boolean-tostring.html")}}
+ + + +

语法

+ +
bool.toString()
+ +

返回值

+ +

表示特定{{jsxref("Boolean")}}对象的字符串。

+ +

描述

+ +

{{jsxref("Boolean")}} 对象覆盖了 {{jsxref("Object")}} 对象的  toString 方法。并没有继承 {{jsxref("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{{jsxref("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{{jsxref("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

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('ES1')}}{{Spec2('ES1')}}Initial definition.
{{SpecName('ES5.1', '#sec-15.6.4.2', 'Boolean.prototype.toString')}}{{Spec2('ES5.1')}} 
{{SpecName('ES6', '#sec-boolean.prototype.tostring', 'Boolean.prototype.toString')}}{{Spec2('ES6')}} 
{{SpecName('ESDraft', '#sec-boolean.prototype.tostring', 'Boolean.prototype.toString')}}{{Spec2('ESDraft')}} 
+ +

浏览器兼容

+ + + +

{{Compat("javascript.builtins.Boolean.toString")}}

+ +

相关链接

+ + -- cgit v1.2.3-54-g00ecf