Tramway Callback Adapter is a simple backwards compatible wrapper to allow code using callbacks to adapt to future async/await implementations in a Tramway project built in ES2015+. Furthermore, its intent is to reduce the clutter associated with conditionally returning callbacks in the new try-catch syntax.

Installation:

1. npm install tramway-callback-adapter

Documentation

CallbackAdapter.executeAsyncAsCallback

| Parameter | Type | Usage | | --- | --- | --- | | cb | function | The callback function that's expected to be invoked | | func | AsyncFunction | The async function that will be called | | ...args | ...any | The arguments that will be passed to the async function |

Example usage

Imagine you have a class that handles some asynchronous operation and is expected to return a response as a callback but it will use a new async function to get the data. Wrapping the async function's call with the executeAsyncAsCallback method will wrap the response into a callback invocation.

import CallbackAdapter from 'tramway-callback-adapter';

function timeout(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

class Test {
    execute(cb) {
        CallbackAdapter.executeAsyncAsCallback(cb, this.someAsyncFunc, 1, 5);
    }

    async someAsyncFunc(arg1, arg2) {
        await timeout(3000);
        return arg1 + arg2;
    }
}

let a = new Test();
//outputs null, 6
a.execute((err, res) => {console.log(err, res)});