Fixing a Next.js Hydration Error: My Debugging Story
It happens to all of us: we spend hours debugging trivial problems that should take mere minutes. Recently, I faced a similar situation while developing the blog for my personal website. I encountered a hydration error in Next.js, which turned out to be a real pain to debug. Here's a detailed account of the issue and how I resolved it.
The Grepper Extension
Before diving into the problem, let me introduce you to a tool that I frequently use: the Grepper extension. This extension is incredibly handy for getting quick answers from the coding community. You can learn more about it here.
The Hydration Error
While developing my blog, I encountered a hydration error in Next.js. You can learn more about this specific error here. Initially, I had no idea why this error was occurring, making the debugging process frustrating and time-consuming.
The Culprit: DOM Manipulation
After some investigation, I discovered that the hydration error was caused by the Grepper extension. I used code
blocks in my rich text editor for the blog, and the Grepper extension manipulated the DOM on the webpage. This manipulation was the root cause of the hydration error.
The Solution
To prevent this from happening, I found a useful Super User article that provided a solution. Since I use Firefox, I followed these steps:
- Open
about:config
in Firefox. - Search for
extensions.webextensions.restrictedDomains
. - Add
localhost
to the list of restricted domains.
By doing this, I ensured that the Grepper extension (and any other extensions) would not interfere with my local development environment, preventing such hydration errors.
Conclusion
Debugging can sometimes lead us down a rabbit hole, but with the right tools and knowledge, we can find solutions to seemingly complex problems. I hope my experience with the error and its resolution helps you facing similar issues.
Cheers, David