run-async

import { runAsync } from 'run-async'; // A helper to demonstrate how runAsync normalizes different function types const printAfter = async (func: Function) => { const cb = (err: Error | null, returnValue: unknown) => { if (err) { console.error('Error:', err); return; } console.log(returnValue); }; // Execute the function using runAsync, passing a callback // runAsync returns a function that takes arguments for func try { const result = await runAsync(func, cb)(); // If func returns a Promise, runAsync resolves it. The callback also fires. // We'll catch the potential Promise resolution here. // The callback provided to runAsync will still be called. } catch (error) { console.error('Caught an error from runAsync execution:', error); } }; console.log('--- Using this.async ---'); printAfter(function (this: any) { const done = this.async(); setTimeout(() => { done(null, 'done running with callback'); }, 10); }); console.log('\n--- Returning a Promise ---'); printAfter(function () { return new Promise(resolve => { setTimeout(() => resolve('done running with promises'), 5); }); }); console.log('\n--- Synchronous function ---'); printAfter(function () { return 'done running sync function'; }); // Example using runAsync.cb for Node.js callback style console.log('\n--- Using runAsync.cb (Node.js callback style) ---'); runAsync.cb( (a: number, b: number, cb: (err: Error | null, result: number) => void) => { setTimeout(() => cb(null, a + b), 20); }, (err: Error | null, result: number) => { if (err) console.error('Error with runAsync.cb:', err); else console.log(`runAsync.cb result: ${result}`); } )(5, 7);