What are the differences between == and === in JavaScript?

What are the differences between == and === in JavaScript?

In JavaScript, '==' is the loose equality operator, which checks for value equality after type coercion, while '===' is the strict equality operator, which checks for both value and type equality.

Can you give me an example of how they work?

Sure! For example, '5' == 5 returns true because '5' is coerced to a number, but '5' === 5 returns true because both value and type match.

What about null and undefined?

Using '==' null == undefined returns true because they are considered equal in loose equality, but '===' returns false since they are different types.

When should I use each operator?

It's generally recommended to use '===' to avoid unexpected results from type coercion, ensuring both value and type match.