Makes async methods work with callbacks and promises. You have a function on your class that expects a callback as last parameter? Wrap it using the asyncMethod and it returns a promise if the callback is omitted.
npm i async-method
// create a class
var MyClass = new Class({
multiply: asyncMethod(function(a, b, callback) {
process.nextTick(function() {
callback(null, a*b);
});
})
});
var myClassInstance = new MyClass();
// classic callback
myClassInstance.multiply(3, 5, function(err, result) {
});
// es6 promise
myClassInstance.multiply(3, 5).then(function(result) {
}).catch(function(err) {
});