Dec 11, 2008 · Both are equally quick. To quote Douglas Crockford's excellent JavaScript: The Good Parts, JavaScript has two sets of equality operators: === and !==, and their evil twins == and !=. The …

Jul 8, 2025 · Equality comparisons and sameness JavaScript provides three different value-comparison operations: === — strict equality (triple equals) == — loose equality (double equals) Object.is() …

When comparing a string with a number, JavaScript will convert the string to a number when doing the comparison. An empty string converts to 0. A non-numeric string converts to NaN which is always …

Jul 11, 2025 · Now, our main concern is getting to know the difference between the '==' and '===' operators that the javascript provides, though they look similar, they are very different.

Nov 22, 2024 · === (Triple equals) is a strict equality comparison operator in JavaScript, which returns false for the values which are not of a similar type. This operator performs type casting for equality.

Feb 14, 2023 · The == and === operators in JavaScript are comparison operators that we use to determine if two values are equal or not. The == operator performs a loose equality comparison that …

Jul 1, 2024 · Understanding the differences between == and === is essential for writing robust JavaScript code. The == operator can lead to unexpected results due to type coercion, while the === …

Jul 8, 2025 · Strings must have the same characters in the same order. Booleans must be both true or both false. The most notable difference between this operator and the equality (==) operator is that if …

Dec 11, 2009 · 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?

Jul 8, 2025 · There's a "willful violation" of the above algorithm: if one of the operands is document.all, it is treated as if it's undefined. This means that document.all == null is true, but document.all === …