Map node-style callback to a promise

$ npm install p-from-callback

• pure esm module
• typescript types
• supports multiple return values
• 100% test coverage

import { readFile } from 'node:fs';
import fromCallback from 'p-from-callback';

fromCallback(cb => readFile("foo.txt", cb)).then(buf => buf.toString('utf8'));
fromCallback(cb => cb(undefined, "foo", "bar"), true)
    .then([foo, bar] => foo === "foo" && bar === "bar");

Takes a callback resolver and returns a promise to the resolved value, or array of values when multi = true.

See the LICENSE file for license rights and limitations (MIT).