Lessons from open-source: try..catch(_)?

This lesson is picked from Next.js source code. In this article, you will learn that you can use an underscore “_” to intentionally ignore error in your catch block.

Reasons why you want to ignore error parameter in your catch block:

1. There’s no further processing required when an error is encountered.

2. Implement a fallback that does not rely on error.

Learn the best practices used in open source

Where else is catch(_) used in Next.js source code?

This search result shows that catch(_) is used in quote some places across the nextjs source code.

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Hey, my name is Ramu Narasinga. I study large open-source projects and create content about their codebase architecture and best practices, sharing it through articles, videos.

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Conclusion:

May be it is a common convention to use ‘_’ to ignore parameters but this was not my style. Now I know what to do, should I choose to skip declaring a parameter in a function. I simply write catch(_)