Difference between == and === in Javascript

20 Dec 2014

The == (or !=) operator performs an automatic type conversion if needed.

In the otherhand, the === (or !==) operator will not perform any conversion. It compares both the value and type, which could be considered faster than ==.

Few Examples

Code	Result
[10] === 10	false
[10] == 10	true
'10' == 10	true
'10' === 10	false
[] == 0	true
[] === 0	false
'' == false	true
'' === false	false
true == "a"	false