How is the nullish coalescing operator (??) different from the logical OR operator (||) in ECMAScript?

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The || operator evaluates to the right-hand side if and only if the left-hand side is a falsy value.

The ?? operator (null coalescing) evaluates to the right-hand side if and only if the left-hand side is either null or undefined.

false, 0, NaN, "" (empty string) are for example considered falsy, but maybe you actually want those values. In that case, the ?? operator is the right operator to use.

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