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What is the difference between the !== operator and the != operator in JavaScript? Does it behave similarly to the === operator where it compares both value and type?
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The strict equality operator ( === ) behaves identically to the abstract equality operator ( == ) except no type conversion is done, and the types must be the same to be considered equal. The == operator will compare for equality after doing any necessary type conversions.
The === operator compares operands and returns true if both operands are of same data type and have some value, otherwise, it returns false. The !== operator compares operands and returns true if both operands are of different data types or are of the same data type but have different values.
The != operator compares the value or equality of two objects, whereas the Python is not operator checks whether two variables point to the same object in memory.
The not-equal-to operator ( != ) returns true if the operands don't have the same value; otherwise, it returns false .
Yes, it's the same operator like ===, just for inequality:
!==- returns true if the two operands are not identical. This operator will not convert the operands types, and only returns false if they are the same type and value. —Wikibooks
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Yes, !== is the strict version of the != operator, no type coercion is done if the operands are of different type:
0 != '' // false, type coercion made 0 != '0' // false false != '0' // false 0 !== '' // true, no type coercion 0 !== '0' // true false !== '0' // true If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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