Key Concepts

Review core concepts you need to learn to master this subject

Resolving JavaScript Promises

Asynchronous JavaScript function

Async Await Promises

Using async await syntax

JavaScript async…await advantage

Async Function Error Handling

JavaScript aysnc await operator

Resolving JavaScript Promises

let promise1 = Promise.resolve(5);
let promise2 = 44;
let promise3 = new Promise(function(resolve, reject) {
  setTimeout(resolve, 100, 'foo');
});

Promise.all([promise1, promise2, promise3]).then(function(values) {
  console.log(values);
});
// expected output: Array [5, 44, "foo"]

When using JavaScript async...await, multiple asynchronous operations can run concurrently. If the resolved value is required for each promise initiated, Promise.all() can be used to retrieve the resolved value, avoiding unnecessary blocking.

Async Await
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