Yes, but with an important nuance worth understanding before you present it:
What it IS:
What it is NOT:
Safe, accurate ways to headline it:
Avoid saying:
For 17,000 people, I'd recommend: "Real-Time Global Earthquake Monitor -- Powered by USGS". It's impressive, accurate, and crediting USGS adds legitimacy. Want me to update the title/branding in the navbar to reflect this before you publish?
The code returns the following error:
Uncaught Error: Hydration failed because the server rendered HTML didn't match the client. As a result this tree will be regenerated on the client. This can happen if a SSR-ed Client Component used:
- A server/client branch `if (typeof window !== 'undefined')`.
- Variable input such as `Date.now()` or `Math.random()` which changes each time it's called.
- Date formatting in a user's locale which doesn't match the server.
- External changing data without sending a snapshot of it along with the HTML.
- Invalid HTML tag nesting.
It can also happen if the client has a browser extension installed which messes with the HTML before React loaded.
https://react.dev/link/hydration-mismatch
...
<RedirectErrorBoundary router={{...}}>
<InnerLayoutRouter url="/" tree={[...]} params={{}} cacheNode={{rsc:<Fragment>, ...}} segmentPath={[...]} ...>
<SegmentViewNode type="page" pagePath="page.tsx">
<SegmentTrieNode>
<ClientPageRoot Component={function Page} serverProvidedParams={{...}}>
<Page params={Promise} searchParams={Promise}>
<div className="relative h...">
<div>
<div className="absolute t...">
<TopBar stats={{...}}>
<div className="glass-pane..." style={{...}}>
<div>
<div className="flex items...">
<div>
<div>
<div>
<button type="button" onClick={function onClick} className="w-8 h-8 ro..." ...>
<Sun className="w-4 h-4">
<svg
ref={null}
xmlns="http://www.w3.org/2000/svg"
width={24}
height={24}
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
strokeWidth={2}
strokeLinecap="round"
strokeLinejoin="round"
+ className="lucide lucide-sun w-4 h-4"
- className="lucide lucide-moon w-4 h-4"
aria-hidden="true"
>
+ <circle cx="12" cy="12" r="4">
- <path
- d="M20.985 12.486a9 9 0 1 1-9.473-9.472c.405-.022.617.46.402.803a6 6 0 0 0 8.268 8.268..."
- >
...
...
...
...
at circle (unknown)
at TopBar (components/top-bar.tsx:170:13)
at Page (app/page.tsx:33:9)
168 | >
169 | {resolvedTheme === "dark" ? (
> 170 | <Sun className="w-4 h-4" />
| ^
171 | ) : (
172 | <Moon className="w-4 h-4" />
173 | )}
Revise the code to address the error.
I was previewing: /
The file already has the mounted guard on the theme toggle at line 169-177. Let me check the error line number more carefully -- the error points to line 170, but the diff shows +Sun vs -Moon. The mounted check is present, so let me check if the page itself is also reading theme:
The mounted guard is already in the top-bar code. The error trace shows line 170 pointing at the <Sun> component -- but that's inside the mounted branch which should work. The issue is that stats data from useEarthquakes returns initial earthquakes: [] on the server but may differ on the client if the fetch resolves before hydration. But more likely, the time state is the culprit -- it's set to "" on server but immediately gets a value on client during the first useEffect. Let me check if there's a timing issue with the mounted state and time rendering together:
The actual problem is that time renders immediately via the clock useEffect -- but that's fine because it starts as "". The real issue is likely that next-themes resolves the theme before mounted becomes true in a race condition. Let me make the theme toggle completely safe by wrapping it differently:
Moved the mounted guard to wrap the entire <button> element instead of just the icon inside it. Previously, the button rendered on the server with an empty <div> child, but React could still mismatch on the button's onClick handler binding to resolvedTheme. Now the whole button is deferred until after hydration, replaced by a matching-size <div> placeholder on the server.
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