JavaScript Equality Operators: When to Use == and ===

In JavaScript, == and === are both used for comparison, but they work differently:

== (Equality Operator):

1. • The == operator compares two values for equality after converting both values to a common type. This is known as "type coercion."

     • If the values being compared are of different types, JavaScript attempts to convert them to the same type before making the comparison.

     • Example:

        5 == '5' // true, because '5' is coerced to 5 before comparison
       

===(Strict Equality Operator):

1. • The === operator compares both the value and the type without performing any type conversion.

     • If the values are of different types, the comparison returns false.

     • Example:

        5 === '5' // false, because 5 is a number and '5' is a string
       

In summary:

• Use == when you want to compare values after type conversion.

• Use === when you want to compare both value and type, ensuring that no type conversion occurs.