es6 async arrow function code example

Example 1: async arrow function

const foo = async () => {
  // do something
}

Example 2: async await promise all javascript

let characterResponse = await fetch('http://swapi.co/api/people/2/')
let characterResponseJson = await characterResponse.json()
let films = await Promise.all(
  characterResponseJson.films.map(async filmUrl => {
    let filmResponse = await fetch(filmUrl)
    return filmResponse.json()
  })
)
console.log(films)

Example 3: javascript async await arrow function

Async arrow functions look like this:

const foo = async () => {
  // do something
}
Async arrow functions look like this for a single argument passed to it:

const foo = async evt => {
  // do something with evt
}
Async arrow functions look like this for multiple arguments passed to it:

const foo = async (evt, callback) => {
  // do something with evt
  // return response with callback
}
The anonymous form works as well:

const foo = async function() {
  // do something
}
An async function declaration looks like this:

async function foo() {
  // do something
}
Using async function in a callback:

const foo = event.onCall(async () => {
  // do something
})

Example 4: async await arrow function

YourAsyncFunctionName = async (value) => {

    /* Code goes here */

}