Nullish Coalescing Operator Javascript Javascriptcode RrCVDU4xrnM

Web Reference: Aug 26, 2025 · The nullish coalescing (??) operator is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side operand. The nullish coalescing operator can be seen as a special case of the logical OR (||) operator. Description The ?? operator returns the right operand when the left operand is nullish (null or undefined), otherwise it returns the left operand. It’s been there since the beginning of JavaScript, so developers were using it for such purposes for a long time. On the other hand, the nullish coalescing operator ?? was added to JavaScript only recently, and the reason for that was that people weren’t quite happy with ||.

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