==) and triple equals
===) operators are used for comparison.
== operator compares the value of two operands, and
returns true if they are equal, regardless of their data types. For
console.log(5 == "5"); // true console.log(true == 1); // true console.log(null == undefined); // true
On the other hand, the
=== operator compares both the value
and data type of two operands, and only returns true if they are strictly
equal. For example:
console.log(5 === "5"); // false console.log(true === 1); // false console.log(null === undefined); // false
It is generally recommended to use the
=== operator when
produces more predictable results. However, there are some cases where the
double equals operator may be useful, such as when checking for null or
==is a comparison operator that checks if two values are equal after doing type coercion. This means that
==will convert the types of the operands before comparing them.
===is a strict comparison operator that checks if two values are equal without doing type coercion, and will only compare the values if they are of the same type.
===is generally considered a better practice, as it avoids unexpected behavior due to type coercion.