Error handling in JavaScript can be messy. Wrapping large blocks of code in try/catch statements works, but as your project grows, debugging becomes a nightmare. Fortunately, there's a better way. Enter the Safe Assignment Operator (?=)—a cleaner, more efficient way to handle errors that keeps your code readable and your debugging simple.
What Is the Safe Assignment Operator?
The Safe Assignment Operator (?=) is a simple solution for error handling. Instead of wrapping code in complex try/catch blocks, ?= allows you to handle errors directly within assignments, making your code easier to read and manage.
Simplify Error Handling in Just One Line
Does your code look like this?
try {
const result = potentiallyFailingFunction();
// More logic with result
} catch (error) {
console.error('An error occurred:', error);
}
Now, imagine simplifying it to just one line:
const result ?= potentiallyFailingFunction();
With ?=, you manage errors instantly, no catch blocks, no fuss.
Why It’s a Game-Changer for Developers
Why is ?= a game-changer for developers? It removes clutter from your code and saves you time. Instead of nesting endless try/catch blocks, you handle errors inline. Your code stays clean, readable, and easy to debug. No more breaking the flow—just smooth, efficient error handling.
Best Practices
Keep it Simple: Use
?=for non-critical errors that don’t need immediate attention. It’s perfect for gracefully handling minor issues, keeping your code clean and your focus sharp.Combine with Fallbacks: Pair
?=with default values to ensure smooth execution, even when something goes wrong.
const config ?= getConfig() || defaultConfig;
-
Know When to Stick to Traditional Handling: For critical operations, stick to traditional
try/catch. Use?=where it makes sense to keep your code simple.
What to Watch Out For
While the ?= operator is a fantastic tool, it’s not a magic solution.
Silent Failures: Use
?=for errors you don’t need to log. For critical issues, log the problem.Fallback Pitfalls: Don’t overuse fallbacks. Make sure default values make sense for your application.
Conclusion
The Safe Assignment Operator (?=) is more than just a cleaner way to handle errors—it’s a way to write better code. By eliminating unnecessary clutter and simplifying your error management, ?= keeps your projects on track and your code easy to maintain. Try it in your next project and experience how it transforms your workflow for the better.
If you enjoyed this article, consider supporting my work:
Top comments (5)
This operator is from a DRAFT proposal that hasn't even been accepted for consideration yet, let alone adoption. I'd be surprised if it appears any time soon, if at all.
Very similar to my implementation, except I use a more flexible interface.
npmjs.com/package/with-error
Nice, reminds me of await-to-js, which is pretty neat in my opinion.
You never explained what value holds the result variable when it went successfully and when it failed. I would imagine the variable can hold two different types: either the success result or the error result which forces you to type check the result anyway which results again in your so called "cluttered" code.
If that's not the case you would simply omit the error which is not error handling.
try/catch isn't complex
Is there eslint for this?
Some comments have been hidden by the post's author - find out more