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Asynchronous JavaScript Explained

bookBest Practices for Non-blocking Code

When writing robust, non-blocking JavaScript code, you should always focus on maintaining code clarity, reliability, and performance. Keeping asynchronous code easy to read and understand is essential, especially as your codebase grows.

  • Use async and await for readability: these features make complex asynchronous flows much easier to follow than deeply nested callbacks;
  • Always handle errors: ensure that every asynchronous operation has proper error handling—uncaught errors can silently break your application or lead to confusing bugs;
  • Avoid blocking the main thread: offload heavy computations or I/O operations to asynchronous tasks so the user interface remains responsive.
  • Prevent deeply nested callbacks: minimize callback nesting by using promises or async functions, which help prevent callback hell and make your logic more maintainable.
  • Review for bottlenecks: regularly check your code for potential performance issues and ensure that long-running tasks never block the event loop.
Note
Note

Keep async code simple, always handle errors, and avoid blocking the main thread.

question mark

Which is NOT a best practice for asynchronous JavaScript?

Select the correct answer

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 4. Kapitel 5

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bookBest Practices for Non-blocking Code

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When writing robust, non-blocking JavaScript code, you should always focus on maintaining code clarity, reliability, and performance. Keeping asynchronous code easy to read and understand is essential, especially as your codebase grows.

  • Use async and await for readability: these features make complex asynchronous flows much easier to follow than deeply nested callbacks;
  • Always handle errors: ensure that every asynchronous operation has proper error handling—uncaught errors can silently break your application or lead to confusing bugs;
  • Avoid blocking the main thread: offload heavy computations or I/O operations to asynchronous tasks so the user interface remains responsive.
  • Prevent deeply nested callbacks: minimize callback nesting by using promises or async functions, which help prevent callback hell and make your logic more maintainable.
  • Review for bottlenecks: regularly check your code for potential performance issues and ensure that long-running tasks never block the event loop.
Note
Note

Keep async code simple, always handle errors, and avoid blocking the main thread.

question mark

Which is NOT a best practice for asynchronous JavaScript?

Select the correct answer

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 4. Kapitel 5
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