What is the difference between == and === operators?
Loose Equality (==) Operator:
The == operator performs type coercion, which means it attempts to convert the operands to a common type before making the comparison.
It allows for implicit type conversions, which can lead to unexpected behavior in certain situations.
console.log(5 == “5”); // Output: true
console.log(true == 1); // Output: true
console.log(null == undefined); // Output: true
In the example above, the == operator converts the string “5” to a number and performs the comparison, converting both operands to a common type.
Strict Equality (===) Operator:
The === operator, also known as the strict equality operator, does not perform type coercion.
It compares the operands strictly without converting their types.
console.log(5 === “5”); // Output: false
console.log(true === 1); // Output: false
console.log(null === undefined); // Output: false
In the example above, the === operator does not convert the operands and checks for both value and type equality.
The rules for type coercion in loose equality are complex and can lead to unexpected results. For example, the comparison  == false returns true, even though an empty array and false have different types.
On the other hand, the === operator performs a strict comparison and does not convert the operands. It checks for both value and type equality, resulting in more predictable behavior.
It is generally recommended to use the === operator for equality checks to avoid unintended type coercion and ensure explicit comparison.
In summary, the main differences between the == (loose equality) and === (strict equality) operators are:
The == operator performs type coercion, while === does not.
The == operator allows for implicit type conversions, while === checks for both value and type equality.
It is generally considered a best practice to use the === operator for strict and predictable equality checks, as it avoids potential issues arising from type coercion.