promise all async await code example

Example 1: await all pronmises

Promise.all([promise1, promise2, promise3]).then(function(values) {
  console.log(values);
});

Example 2: promise.all async await

async function fetchABC() {
  const [a, b, c] = await Promise.all([a(), b(), c()]);

}

Example 3: 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 4: nodejs promise async

// server.js
 
function square(x) {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve(Math.pow(x, 2));
    }, 2000);
  });
}
 
async function layer(x)
{
  const value = await square(x);
  console.log(value);
}
 
layer(10);

Tags:

Misc Example

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