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With Javascript function JSDocs, I've seen two different syntaxes for documenting the return values that can be nullable.

Let's say we have this function:

const getTitle = () => { // Can return string or null };

For this, which of the following JSDocs is correct:

about 4 years ago · Juan Pablo Isaza

Answer question

Accepted Answer · 2022-07-10T14:39:59.188Z

You can do this in two ways, the first preferred:

@returns {?string}

@returns {string|null}