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
.
代码片段
const coalesce = (...args) => args.find(v => ![undefined, null].includes(v));
使用样例
coalesce(null, undefined, '', NaN, 'Waldo'); // ''