The answer
Use a design token system. Define your colors, spacing, and typography as tokens, with Tailwind customization or CSS variables, so they stay consistent across the app instead of ad hoc values scattered across components.
Common Navigation and Styling Mistakes in React UIs
How do I keep React styling consistent?
More FAQs in Common Navigation and Styling Mistakes in React UIs
Because anchor tags cause full page reloads and lose app state. Link updates the URL without a reload, which is what makes client-side routing work and preserves the single-page experience.
Without it, invalid URLs show a blank page. A catch-all 404 route handles invalid URLs gracefully, showing a not-found message instead of nothing, which is much better UX.
Because a button that does nothing during a slow request feels broken to users. Show a spinner and disable the button during the request, so users know something is happening and cannot double-click.
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