Promise handling lab

62.7% Acceptance

In this lab, you will be working on understanding and implementing Promises in JavaScript. Promises are used to handle asynchronous operations and provide a more straightforward way to deal with them.

You will be implementing several scenarios where promises can be used effectively.


  • Creating a Promise
  • Promise states (pending, fulfilled, rejected)
  • then(), catch() and finally() methods
  • Chaining Promises
  • Error handling
  • Using Promise.all() and Promise.race()


  1. Create a simple Promise that resolves after a certain time
  2. Make use of then() and catch() methods to handle the Promise
  3. Create a chain of Promises
  4. Implement error handling in Promises
  5. Use Promise.all() to resolve multiple Promises
  6. Use Promise.race() to get the result of the fastest Promise

After completing the lab, you will have a deeper understanding of how Promises work in JavaScript and how to use them for handling asynchronous operations.