Web Reference: Jul 23, 2025 · The nullish coalescing (??) operator is a logical operator in TypeScript that returns its right-hand side operand if the left-hand side operand is null or undefined; otherwise, it returns the left-hand side operand. The nullish coalescing operator is an alternative to || which returns the right-side expression if the left-side is null or undefined. In contrast, || uses falsy checks, meaning an empty string or the number 0 would be considered false. Jun 25, 2025 · Learn how to use the TypeScript ?? (nullish coalescing) operator to handle null or undefined values like a pro. Includes practical examples and best practices.
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