== vs ===

== (equality operator) and === (strict equality operator) are the operators to compare two operands.

The == operator does type conversions before comparing the values. On the other hand, the === operator doesn't perform any type conversions.

It means that the === operator returns true if two operands have the same type and same value.

For example:

// `true` is converted to 1 and then compared to 1
true == 1; // true
true === 1; // false

The following table demonstrates the result of these operators:

Always use === to compare values.