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coalesce javascript Code Snippet in 2022

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Last Updated: 25 September 2022

Returns the first defined, non-null argument.

  • Use Array.prototype.find() and Array.prototype.includes() to find the first value that is not equal to undefined or null.
const coalesce = (...args) => args.find(v => ![undefined, null].includes(v));
coalesce(null, undefined, '', NaN, 'Waldo'); // ''

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