Mastering JavaScript Await: Transform Your Async Code for Cleaner Execution скачать в хорошем качестве

Mastering JavaScript Await: Transform Your Async Code for Cleaner Execution

Learn how to effectively use `async/await` in your JavaScript code to simplify asynchronous operations and improve code readability. --- This video is based on the question https://stackoverflow.com/q/66996050/ asked by the user 'manuelBetancurt' ( https://stackoverflow.com/u/523507/ ) and on the answer https://stackoverflow.com/a/66996085/ provided by the user 'Alexander Nied' ( https://stackoverflow.com/u/6831341/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: JS await execution and then placement Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Mastering JavaScript Await: Transform Your Async Code for Cleaner Execution In the world of JavaScript, managing asynchronous code can often be a challenge. As developers, we frequently require a way to handle tasks that don’t complete immediately, like API calls or reading from a database. One popular solution is the async/await syntax, which enables us to write asynchronous code that looks and behaves like synchronous code. But how do we correctly implement this structure? In this post, we’ll explore a typical problem with asynchronous code and guide you through the steps to solve it using async/await effectively. The Problem: Using async/await Correctly Consider a situation where you are handling authentication attempts in a JavaScript function. Initially, the code might look something like this: [[See Video to Reveal this Text or Code Snippet]] While this works, it doesn’t leverage the full power of async/await. The question arises: How can we rewrite this code to utilize await properly while also ensuring correct placement of the actions that follow? The Solution: Refactoring the Code To get started with the refactor, we need to follow these steps: Step 1: Use await Directly Instead of using .then() to handle the promise returned by getAuthFailedAttempts(), we can simply assign the result of the awaited call directly to a variable. This provides cleaner and more readable code. Here’s how it transforms: [[See Video to Reveal this Text or Code Snippet]] Step 2: Move the Logic Under the await Statement All of the logic that was previously within the .then() call can be placed below the await statement. This way, once attempt is resolved, the subsequent code can execute seamlessly. Let’s look at the adjusted code: [[See Video to Reveal this Text or Code Snippet]] Additional Considerations Async Function Requirement: Remember, the function that contains await must be declared as an async function. An async function always returns a promise and enables the use of await within its body. [[See Video to Reveal this Text or Code Snippet]] Error Handling: Consider implementing error handling within your async function using try/catch to gracefully manage any issues that arise from the awaited call. Conclusion By transitioning from .then() to async/await, we simplify our asynchronous code, enhancing both readability and maintainability. This approach allows us to handle complex functionality without getting lost in callback hell. Remember, cleaner code is not just about readability; it can also reduce potential bugs and make it easier for teams to collaborate on projects. Now that you’re equipped with this technique, it’s time to refactor your own asynchronous JavaScript code! If you have further questions, feel free to reach out in the comments below. Happy coding!