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Promisify: node custom promisify
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| const { promisify } from "util"; | |
| const evenSuccess = (n, onSuccess, onError) => { | |
| if (n % 2) { | |
| onError(n); | |
| } else { | |
| onSuccess(n); | |
| } | |
| }; | |
| evenSuccess[promisify.custom] = n => new Promise((resolve, reject) => { | |
| evenSuccess(n, () => resolve("even"), () => reject("odd")); | |
| }); | |
| promisify(evenSuccess)(2).then(console.log) // "even" |
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