From promise to ES6 async

We saw that there are many ways to do asynchronous code in javascript from callback function to promise, but now with ES6 there is a new way to do asynchronous code with the (async, await) keywords. This ES6 syntax must be used with Promise so this is a not a new way to produce async code but a better way to consume Promise by avoid all this then and catch method.

Async function

const getId = new Promise( (resolve, reject) => {
    setTimeout( () => {
        resolve( [100, 200, 300, 400] );
    }, 1500 );
} );

const getIdAw = async () => {
    const Id = await getId;
    console.log(Id);
};

getIdAw();

1. Like we said async functions is a new way to consume Promise.
2. You can create an async function simply by using the async keywords in front of your function, this will tell to the javascript engine this function will run in background.
3. Remember that we said that inside an async function we can access the result of our Promise function (resolve, reject), in order to do that you have to use the await keywords and called your Promise.
4. So in summary we can tell that the getIdAw function is an asynchronous function who runs in the background of our code and wait for Promise to be resolved or not.
5. You can use inside your async function ordinary code which means without await but the result will always be convert to a Promise.

Current errors

This is a list of the main errors that you can meet:

Note: I'm not a wizard there is maybe some issue that you notice above so fell free to open an issue in the github repo if you find a new error not mentioned above.