js !==

JavaScript
>= // greater than or equal 
<= // less than or equal
> // greater than
< // less than
== // equals
=== // strictly equals
!= // not equals
!== // stricly not equals// " != " in Javasacript means : not equal.true != true // => falsevar x = 5;

// === 	equal value and equal type
// e.g. 1. 
x === 5 returns true

// e.g. 2.
x === "5" returns false

// !== not equal value or not equal type
// e.g. 1.
x !== 5 returns false

// e.g. 2.
x !== "5" returns true

// e.g. 3.
x !== 8 returns true
Source

Also in JavaScript: