对象可以是假的吗？ [英] Can an Object be false?

问题描述

有没有办法让对象在javascript中返回false？

Is there any way to make an object return false in javascript?

var obj = new Object();

console.log(!!obj) // prints "true" even if it's empty

推荐答案

不。没有分配任何属性的对象不被视为空。

No. An object that doesn't have any properties assigned is not considered "empty".

变量保存对象实例的事实足以导致javascript处理当表达式需要布尔值时，变量的值为 true 。

The fact that a variable holds an instance of an object is enough to cause javascript to treat the variable as having the value of true when an expression requires a boolean value.

编辑

在这里查看其他答案时，显然有一些细微差别需要澄清。

There are clearly some nuances to be cleared up looking at the other answers here.

null 不是一个对象，它是一个明显缺乏的对象。该问题涉及一个Object，即刚刚创建的Object。

null is not an object, it is the distinct lack of an object. The question refers to an Object, that is one that has just been created.

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