JavaScript: Double Equal Operator
- The double equal operator
==
can be used to test equality of Primitive Value of the same type. - WARNING: If left-hand-side and right-hand-side are of different type, it does a type conversion first, often resulting unexpected result.
TIP: never use double equal. Use Triple Equal Operator instead.
console.log([] == ""); console.log("0" == 0); console.log("" == 0); console.log(1 == true);