The difference between == and === in JS

Question

Possible duplicates:
Difference between == and === in JavaScript
Javascript === vs ==: Does it matter which "equal" operator I use?

What is the difference between == and === ? Also between !== and !== ?

Answer 1

There are already many answers to this question in Stackoverflow.

Short:

== compares only values

=== compares values ​​+ type

---

 var check1 = '10', check2 = 10; check1 == check2 // true check1 === check2 // false 

Answer 2

"==" means equals, while "===" means identically equal.

In short, "==" will try and force / convert value types when comparing, so "2" == 2, while "===" will not.