Common Bugs in Bolt.new-Generated Code

Bolt optimizes for speed of creation, not production readiness. It generates working prototypes in a controlled environment where many production concerns (CORS, env vars, error handling) don't surface until deployment

Bolt's prototypes work in its WebContainer but break when deployed because they depend on Bolt's development environment. Common bugs: hardcoded localhost URLs that fail in production, missing environment variables causing startup crashes, CORS errors because the backend URL is wrong, and incomplete error handling that shows blank screens when API calls fail

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 Bolt.new 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 — Bolt.new 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 Bolt.new 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.