async function name([param[, param[, ...param]]]) {

   statements

}

// Old School Javascript Invoke

(async function() {

    await someAsyncFunction();

})();

​

//New ES6 Javascript Invoke

(async () => {

    await someAsyncFunction();

})();

​

//Example (async & await)

function delayResult() {

 return new Promise(resolve => {

   setTimeout(() => {

     resolve(‘Done’);

   }, 5000)

 })

}

async function getResult() {

 let result = await delayResult();

 return result;

}

getResult();

​

//New Example 

const data = async ()  => {

  const got = await fetch('https://jsonplaceholder.typicode.com/todos/1');

  console.log(await got.json())

}

​

data();

​

const yourAsyncFunction = async () => {

    // do something asynchronously and return a promise

    return result;

  }

anArray.forEach(async item => {

   // do something asynchronously for each item in 'anArray'

   // one could also use .map here to return an array of promises to use with 'Promise.all()'

 });

server.getPeople().then(async people => {

  people.forEach(person => {

    // do something asynchronously for each person

  });

});

//Async function (JAVASCRIPT)

//async function have 1 main purpose:

​

//Being able to use 'await' in a function

function example() {

return await fetch('https://mysite.com/api'); //error

}

​

async function smartexample() {

return await fetch('https://mysite.com/api'); //mhmm!

}

JS

copy

const doSomethingAsync = () => {

  return new Promise(resolve => {

    setTimeout(() => resolve('I did something'), 3000);

  });

};