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yefim/promise-or-callback.js

Created January 23, 2019 05:56
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promise-or-callback.js
const promiseOrCallback = (cb) => {
if (cb) {
cb('callback');
} else {
return Promise.resolve('promise');
}
};
const main = async () => {
console.log(await promiseOrCallback());
promiseOrCallback(console.log);
}
main();
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