Javascript Operators === & !==

The following example will demonstrate the Tip:

var x;
x = 0;
var y;
y = '0';

x is numeric, while y is char.

On comparing them using the "==" operator, it will give true !

alert('x == y : ' + (x==y));

To do so, we will use the '===' operator:

alert('x === y : ' + (x===y));

which checks on the Value and Type, so it will give false.

Same for the !== operator.

alert('x != y: '; + (x != y));

it gives false !!

alert('x !== y: '; + (x !== y));

it gives true


So, to assure an accurate comparison datatype and value don't use the normal operators == and != but use === and !== operators.