为什么不在javascript中转换对象和从JSON转换对象？

Question

I'm having an issue comparing objects encoded and decoded to and from JSON

//Test data
var test_obj = {
    test:'value',
    t:3,
    x:[0,5,3]
};
var t = JSON.stringify(test_obj);
var t_prime = JSON.parse(t);

You'd think that test_obj === t_prime would return true, or perhaps test_obj == t_prime would return true, but this is not the case.

Why is this, and how can I verify that I get the same object to and from a javascript object to JSON?

Answer 1

When you compare objects in JS, you are checking to see if they are the same object and not identical objects .

Converting to JSON turns an object into a string. Converting from JSON creates a new object based on the JSON data.

If you want to check if two objects are identical, then see How do you determine equality for two JavaScript objects? .