In JavaScript, == (equality) and === (strict equality) are used to compare values or expressions. The main difference between them is how they compare the values.
The == (equality) operator compares the values for equality after performing type coercion if necessary. This means that if the types of the operands are different, JavaScript will attempt to convert them to a common type before making the comparison. For example:
"2" == 2 // true, because "2" is converted to 2 false == 0 // true, because false is converted to 0 null == undefined // true, because they are both considered "falsy" values
On the other hand, the === (strict equality) operator compares the values for equality without performing type coercion. This means that the operands must have the same type and value to be considered equal. For example:
"2" === 2 // false, because they have different types false === 0 // false, because they have different types null === undefined // false, because they have different types
In general, it’s recommended to use === (strict equality) because it avoids unexpected results due to type coercion. However, there may be cases where type coercion is necessary, in which case you can use == (equality).
