This content originally appeared on DEV Community and was authored by Midhul P
Async errors in JavaScript arise when operations like network requests or file I/O fail unexpectedly. Without proper handling, these errors can lead to app crashes or erratic behavior. Here’s a brief guide on some effective ways to manage async errors in your code.
1. Try-Catch with Async/Await
For async functions, wrapping code in a try-catch block lets you handle errors gracefully. Here’s how:
async function fetchData() {
try {
const response = await fetch('https://api.example.com/data');
const data = await response.json();
console.log(data); // Process data
} catch (error) {
console.error('Fetch error:', error); // Handle error
}
}
2. Handling Promise Rejections
If you’re working with promises directly, the .catch() method allows you to handle rejections easily:
fetch('https://api.example.com/data')
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Promise rejection:', error));
3. Global Error Handling
To catch any unhandled rejections across your application, use the unhandledrejection event:
window.addEventListener('unhandledrejection', event => {
console.error('Unhandled rejection:', event.reason);
});
4. Logging and Reporting Errors
While logging errors to the console works for development, production apps benefit from dedicated error-tracking tools like Sentry or LogRocket.
For a more in-depth look at async error handling, check out my full article on Medium: How to Handle JavaScript Async Errors : A Practical Guide
This content originally appeared on DEV Community and was authored by Midhul P
Midhul P | Sciencx (2024-11-06T03:38:46+00:00) Handling Async Errors in JavaScript: A Quick Guide. Retrieved from https://www.scien.cx/2024/11/06/handling-async-errors-in-javascript-a-quick-guide/
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