Introduction:
TypeScript is a powerful, typed superset of JavaScript that can help you write more organized and maintainable code. One of the advanced features of TypeScript is the support for async and await, which allows you to write asynchronous code in a more readable and manageable way. In this blog post, we will explore the basics of async and await in TypeScript and understand how to use them effectively in your code.
What are Async and Await?
Async and await are two keywords in TypeScript that allow you to write asynchronous code in a more readable and manageable way. Async functions are marked with the keyword async and return a promise. Await is used within an async function to wait for a promise to resolve before moving on to the next line of code.
Using Async and Await:
To use async and await, you need to create an async function and use the await keyword within the function to wait for a promise to resolve. For example, you can create an async function that waits for a delay before resolving:
async function delay(ms: number) {
return new Promise(resolve => setTimeout(resolve, ms));
}
And you can use the await keyword within another async function to wait for the delay to finish:
async function delayedLog(ms: number) {
await delay(ms);
console.log(`Delayed by ${ms}ms`);
}
Advantages of using Async and Await:
Async and await can help you write more organized and maintainable code by allowing you to write asynchronous code in a more readable and manageable way.
Async and await can make your code more expressive by allowing you to write asynchronous code that looks like synchronous code.
Async and await can help you write more powerful code by allowing you to handle multiple asynchronous operations at once.
When to use Async and Await:
Async and await are a powerful feature that can help you write more organized and maintainable code, and make your code more expressive. They are particularly useful when working on large projects with multiple developers, or when you want to handle multiple asynchronous operations at once. They are also useful when you want to create a function that return promise and you want to handle the resolved value.
Conclusion:
TypeScript async and await are a powerful feature that allows you to write asynchronous code in a more readable and manageable way. They can help you write more organized and maintainable code, make your code more expressive, and create more powerful code. Understanding the basics of async and await in TypeScript and how to use them effectively is an essential part of developing with TypeScript.
