when to use === in javascript code example

Example 1: js ===

5 =='5' // true: ignores type
5 === '5' // false: includes type

Example 2: === javascript

// ===	means equal value and equal type
var x = 5

// true
x === 5

// false
x === "5"

Example 3: javascript == vs ===

var one = 1;
var one_again = 1;
var one_string = "1";  // note: this is string

console.log(one ==  one_again);  // true
console.log(one === one_again);  // true
console.log(one ==  one_string); // true. 
console.log(one === one_string); // false.