Which equals operator (== vs ===) should be used in JavaScript comparisons

Double equals (==) is abstract equality comparison operator, which transforms the operands to the same type before making the comparison.

For example,

4 == 4     // true
'4' == 4   // true
4 == '4'   // true
0 == false // true

Triple equals (===) are strict equality comparison operator, which returns false for different types and different content.

For example,

4 === 4     // true
4 === '4'   // false
var v1 = {'value': 'key'};
var v2 = {'value': 'key'};
v1 === v2   //false

Sravani S

e

Updated on: 12-Sep-2019

74 Views

Kickstart Your Career

Get certified by completing the course

Get Started