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#app-index.tsx:25 Warning: Extra attributes from the server: bis_register,__processed_0b3b2aba-a3d8
stiff turretBOT
This warning is related to a hydration mismatch in Next.js App Router. It occurs when there are attributes in the server-rendered HTML that don't match what React expects during client-side hydration.
Based on the knowledge sources, this type of warning appears when:
- There's a mismatch between server-rendered HTML and client-side properties
- Browser extensions might be injecting attributes into your HTML before React loads
The warning you're seeing with bis_register and __processed_0b3b2aba-a3d8 attributes is likely caused by a browser extension that's modifying your DOM. This is a common issue that can trigger hydration warnings in Next.js applications.
Similar issues have been reported in the Next.js GitHub repository, where users experienced warnings about unexpected attributes like _msttexthash and _msthash in issue #64194, or data-arp in issue #72998.
To address this issue, you can:
- Try disabling browser extensions to identify which one is causing the problem
- Use the
suppressHydrationWarningprop on the parent element where the warning occurs (though this only suppresses the warning and doesn't fix the underlying issue) - Test your application in an incognito/private browsing window where extensions are typically disabled by default
While this warning doesn't break your application's functionality, it indicates that there's a mismatch between what's rendered on the server and what's expected on the client.
If you need to use the suppressHydrationWarning prop, you can add it to the element like this:
<div suppressHydrationWarning>
{/* Your content */}
</div>