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How to tackle asynchronous code using node js

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by shivanisanju03 dot icon Updated: Mar 31, 2023

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Guide Kit Guide Kit  

Two ways can handle the asynchronous task 

  1. With Promise and then the method 
  2. With the async/await method 

 

 

The asynchronous function can be written using ‘async’ preceding the function name in Node js. The asynchronous function returns an implicit Promise as a result. The async function helps to write promise-based code asynchronously through the event loop. A value will always be returned in the Async function. 

 

 

Below is an example of how to tackle asynchronous code using node js 

Fig: Preview of the output that you will get on running this code from your IDE.

Code


Node js code in which i want to learn how to tackle asynchronous code

Lines of Code : 26dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
function promiseFunction() {
    return new Promise((resolve, reject) => {
        setTimeout(()=>{
            console.log('completed task and resolve');
            resolve()
        },3000)
    })
}
promiseFunction().then(() => {
    console.log('all task completed with your message (app)');
})

asyncFunction();
function promiseFunction() {
    return new Promise((resolve, reject) => {
        setTimeout(()=>{
            console.log('completed task and resolve');
            resolve()
        },3000)
    })
}
async function asyncFunction() {
  await promiseFunction();
  console.log('all task completed with your message (app)');
}

Instructions


Follow the steps carefully to get the output easily.

  1. Install Node and Visual Studio Code on your computer.
  2. Create a new folder in your local.
  3. Open that folder in Visual Studio Code.
  4. Then create a new JS file(Eg: node.js).
  5. Copy the snippet using 'copy' button and paste it into that file.
  6. Save the file and open the terminal, use this command 'node filename(node.js)' to get the output in your console.



I hope you found this helpful.


I found this code snippet by searching for ' how to tackle asynchronous code using node js ' in kandi. You can try any such use case!

Environment Tested


I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created and tested in Visual Studio Code 1.74.1.
  2. The solution is tested in Node v18.15.0.


Using this solution, we are able to know how to tackle asynchronous code using node js  with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to knowhow to tackle asynchronous code using node js 

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