IN javascript,why {}!==Object()?

Question

Given

    var o = {};
    var p = new Object();

    p === o; //false

    o.__proto__===p.__proto__  // true

why is this false?

please tell me the immediate reason to return false??

Answer 1

The === for objects is defined as:

11.9.6 The Strict Equality Comparison Algorithm

The comparison x === y, where x and y are values, produces true or false. Such a comparison is performed as follows:

...

7. Return true if x and y refer to the same object. Otherwise, return false.

In this case, although both are empty objects, they are created separately and hence do not refer to the same object.

As a side note, both constructions do the same thing; but it is common practice to use {}.

Answer 2

The two objects contain the same thing (i.e. nothing) but they are not the same object.

Javascript's object equality test requires that the two parameters refer to the exact same object.