javascriptcomparison-operatorsequality-operatoridentity-operator

Difference between == and === in JS

Possible Duplicates:
Difference between == and === in JavaScript
Javascript === vs == : Does it matter which “equal” operator I use?

What's the difference between == and ===? Also between !== and !==?

Solution

  • There are lots of answers to this question on Stackoverflow already.

    Short:

    == only compares values

    === compares values + type

    var check1 = '10',
    check2 = 10;

check1 == check2 // true
check1 === check2 // false