Meteor Wrapasync [better] -

Meteor 3 has removed Fibers. wrapAsync still works, but you should migrate to native async/await :

Wrap the function once outside the method to avoid re-wrapping on every call. meteor wrapasync

If you're working with asynchronous code in Meteor (especially on the server), you've likely encountered Meteor.wrapAsync . Meteor 3 has removed Fibers

let result = Meteor.wrapAsync((cb) => { setTimeout(() => cb(null, 'Done'), 1000); })(); let result = Meteor

// Without wrapAsync (callback style) function fetchData(callback) { setTimeout(() => callback(null, { user: 'alice' }), 100); } // With wrapAsync const syncFetch = Meteor.wrapAsync(fetchData); const result = syncFetch(); // Blocks until done console.log(result.user); // 'alice'

legacyLibrary.getData(id, (err, data) => { if (err) console.error(err); console.log(data); }); I wanted to use it inside a Meteor method without nesting. Solution:

const readFileSync = Meteor.wrapAsync(fs.readFile); const content = readFileSync('/path/to/file', 'utf8'); But remember: in Meteor 3, just use fs.promises.readFile with await . Progress! ⚡