JavaScript布尔构造函数属性 _切换布尔值

以下是示例布尔构造函数属性。

< script type = "text/javascript"> var bool = false; document.write("bool.constructor:" + bool.constructor); < /script>

在JavaScript中, 布尔构造函数属性返回对象的构造函数。对于JavaScript布尔值, 构造函数属性返回函数Boolean(){[本地代码]}.
语法如下：

boolean.constructor

返回值：它返回函数Boolean(){[native code]}。
上述属性的更多示例代码如下：
范例1：
此示例说明了布尔构造函数属性。

< !DOCTYPE html> < html> < head> < title> JavaScript Boolean constructor Property < /title> < /head> < body style = "text-align:center; "> < div> < h1 style = "color: green; "> lsbin< /h1> < p> JavaScript Boolean constructor Property returns the function that created the boolean's prototype: < /p> < b id = "GFG"> < /b> < /div> < !-- Script to use boolean constructor --> < script> var bool = false; document.getElementById("GFG").innerHTML = bool.constructor; < /script> < /body> < /html>

输出如下：

文章图片
范例2：
此示例说明了布尔构造函数属性。

< !DOCTYPE html> < html> < head> < title> JavaScript Boolean constructor Property < /title> < /head> < body style = "text-align:center; "> < div> < h1 style = "color: green; "> lsbin< /h1> < p> JavaScript Boolean constructor Property returns the function that created the boolean's prototype: < /p> < button onclick = "gfg()"> Click me< /button> < p id = "name"> < /p> < /div> < !-- Script to use Boolean constructor Property --> < script> function gfg(){ var bool = false; document.getElementById("name").innerHTML = bool.constructor; } < /script> < /body> < /html>

【JavaScript布尔构造函数属性】输出如下：