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How do we implement async in Node.js?

Intermediate Interview Questions


Asked On2022-01-12 09:00:24 by:Muskan-Kumari

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The asynchronous function can be written in Node.js using ‘async’ preceding the function name. The asynchronous function returns implicit Promise as a result. The async function helps to write promise-based code asynchronously via the event-loop. Async functions will always return a value. Await function can be used inside the asynchronous function to wait for the promise. This forces the code to wait until the promise returns a result.
Answerd on:2022-01-13 Answerd By:shwet0710

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The asynchronous function can be written in Node.js using ‘async’ preceding the function name. The asynchronous function returns implicit Promise as a result. The async function helps to write promise-based code asynchronously via the event-loop. Async functions will always return a value. Await function can be used inside the asynchronous function to wait for the promise. This forces the code to wait until the promise returns a result.

Install async from npm in Node.js using the following command:

npm i async

Use async inside your Node.js project using require() method.

Example 1: Create asynchronous function to calculate square of a number inside Node.js.

  • Create a project folder.
  • Use the following command to initialize the package.json file inside the project folder.
    npm init -y
  • Install async using the following command:
    npm i async
  • Create a server.js file & write the following code inside it.
  • Run the code using npm start

Answerd on:2022-01-13 Answerd By:Raj-Gupta

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