Using Async+Await in TypeScript for Improved Performance

Working with Async + Await in TypeScript

Async + Await is a powerful combination for writing asynchronous code in TypeScript. Async + Await provide a simpler, cleaner way to write and execute asynchronous operations and make code easier to read and maintain.

When using this combination, the async keyword is used to define an asynchronous function and the await keyword is used to pause the execution of the function until the asynchronous operation is complete. This allows you to write code that looks synchronous, but falls back to asynchronous operations without having to restructure your code.

Using Async + Await in TypeScript

To use Async + Await in TypeScript, you need to define a function as an async function. Async functions always return a promise, which can either be fulfilled with a value or rejected with an error. You can then await on the result of any asynchronous operation inside that function.

For example, here is an async function that returns the result of an asynchronous operation:

const fetchData = async () => {
  const response = await fetch('https://example.com/data');
  const data = await response.json();
  return data;
};

The await keyword will pause the execution of the function until the promise returned by the fetch operation is fulfilled. Once it is fulfilled, the execution will continue and the data will be returned from the function.

Error Handling

When using Async + Await, errors can be handled in a few different ways. The simplest way is to wrap the asynchronous operation in a try-catch block:

try {
  const data = await fetchData();
  // Do something with the data
} catch (error) {
  // Handle the error
}

You can also use the Promise API to handle errors. Promises have a .catch method which can be used to handle errors that occur within an asynchronous operation. For example:

fetchData()
  .then(data => {
    // Do something with the data
  })
  .catch(error => {
    // Handle the error
  });

Conclusion

Async + Await is a great way to write asynchronous code in TypeScript. It provides a simpler, cleaner syntax and makes code easier to read and maintain. Async + Await can be used to handle errors, as well as handle any asynchronous operations you may need to perform.