What is async function in node JS?

What is the purpose of await and async in nodeJS?

The official rollout of the Node's async/await function was made possible by Node v8 to handle Promises and function-chaining. These functions do not need to be arranged in a sequence. Instead, await the promise-returning function . However, the function async must be declared before waiting for a function to return a Promise.

You might also wonder, "What is the purpose of Async await?" Async functions use an implicit promise to return their result. Even if the promise is not explicitly async function, it ensures that your code passes through a promise. Wait blocks code execution within the await function, of which it( await sentence ) is part.

You might also ask: What is an async function?

Asynchronous functions are functions that operate asynchronously through the event loop and use an implicit Promise to return their result. However, async functions are much more similar to standard synchronous functions in terms of syntax and structure.

JavaScript is everything asynchronous?

JavaScript is single-threaded and always synchronous. JavaScript can only make Ajax calls. The Ajax call will cease execution and no other code will be allowed to execute until it returns (successfully, or not). At that point, the callback will run synchronously.