Common Bugs in v0-Generated Code

v0 generates visual output without functional depth. The components are designed to look right with sample data but don't account for empty states, loading states, error states, or variable content lengths

v0 components use hardcoded mock data, so 'bugs' mostly surface when connecting to real data: undefined errors when API responses are null or empty, type mismatches between mock data shapes and actual API responses, interactive elements (buttons, forms, toggles) that look correct but aren't wired to any logic, and responsive breakpoints that weren't tested with real content lengths

Start by running your app through its complete user flow — sign up, use every feature, try edge cases like empty inputs and invalid data. Most v0 bugs surface when you go off the happy path. Use your browser's developer tools to watch for console errors, failed network requests, and unhandled promise rejections. TypeScript's strict mode will catch many issues at compile time if it's not already enabled.

For async errors, wrap every server-side operation in try/catch blocks and return meaningful error messages. For state bugs, consider whether the state belongs in the URL, in a server component, or in client state — v0 often defaults to client state when server state would be more appropriate. For data fetching issues, implement proper loading and error states for every data-dependent component.

The best way to prevent v0 bugs from reaching production: enable TypeScript strict mode, add ESLint rules for common mistakes (no-floating-promises, exhaustive-deps), and write tests for critical user flows. Even basic smoke tests catch the majority of issues.