How do I test for an empty JavaScript object?

Question

After an AJAX request, sometimes my application may return an empty object, like:

var a = {};

How can I check whether that's the case?

Answer 1

Below are some steps to test for an empty JavaScript object:- 

For ECMA version 7+ you can use the following code:-

Object.entries(obj).length === 0 && obj.constructor === Object

For ECMA version 5+ use following code:

Object.keys(obj).length === 0 && obj.constructor === Object

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