Write about the concepts of Promises and Async/Await in JavaScript 

Js is considered as the basic of most of the programming languages, that’s why it’s a must to learn language as well. There are some concepts in JS which are more complicated than some other concepts of Js. Promise and Async are one of those concepts which are a little bit more complicated for beginners and today I am here to teach you guys the basics of these concepts so you can move forward in your web development journey.

 1: What promises does in your js codes?

Example 1: Fetching Data from a Server

Imagine you're trying to buy a book online so now things will go like this the website you are using to buy the book will fetch the information about the books from a distant server and here comes the promise in work.

In this practical scenario, the Promise fetchBookInfo represents the asynchronous task of fetching book information from a server.

Example 2: Chaining API Requests

Chaining Promises helps you maintain order and structure in handling these tasks.

Here, we simulate fetching user data and user posts sequentially using chained Promises.

Chapter 2: The concepts of Async/Await

Example 1: Simulating a Delay

Async/Await is often used when dealing with tasks that involve delays, such as waiting for a response from a server.

In this scenario, performDelayedTask simulates a time-consuming task using Async/Await, making your code more readable.

Example 2: Multiple Async Tasks

Async/Await shines when dealing with multiple asynchronous tasks, like fetching data from different sources concurrently.

// Using the Async/Await function

fetchData();

In this practical example, fetchData fetches data from two different sources concurrently using Async/Await.

Chapter 3: Combining Promises and Async/Await for Epic Adventures

Example: Parallel API Requests

Combining Promises and Async/Await allows you to perform multiple asynchronous tasks simultaneously, making your code more efficient.

In this epic scenario, fetchParallelData uses Promise.all to fetch user data and user posts in parallel, enhancing the overall speed of the operation.

Conclusion

So, finally if you want to learn more about JS then joining web design courses in Delhi is what you need. Start a small trip of learning JS concepts with experts at web development institute in Delhi. 

Various programs are there for learning JS such as 2 months JavaScript course in Delhi where you can attend the advanced level JavaScript classes in Delhi. Also, always remember, practice turns an average person into a programmer so keep learning.