问题描述
为什么下面的语句在JavaScript中返回false？
Why does the following statement return false in JavaScript?
new String('hello') === new String('hello')
推荐答案
两个字符串 objects 始终彼此不相等。请注意，JavaScript具有字符串 primitive 值以及用于创建包装器对象的String构造函数。所有对象相等性比较（特别是与 === 的比较）均作为对引用相等性的测试。当然，对两个不同对象的引用永远不会相等。
Two String objects will always be unequal to each other. Note that JavaScript has string primitive values as well as a String constructor to create wrapper objects. All object equality comparisons (especially with ===) are carried out as a test for reference equality. References to two different objects will of course never be equal to each other.
所以 hello === hello 将为 true ，因为它们是字符串基元。
So "hello" === "hello" will be true because those are string primitives.
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