Common Bugs in Base44-Generated Code

Base44 generates the data model and UI together, but the permission rules between them require explicit configuration that's easy to under-specify. Frontend-only validation is a common pattern in no-code tools that prioritizes UI completeness over API security

Base44 apps often have permission model gaps — the data model allows associations that the UI doesn't properly scope to the current user. Deleting a record may cascade incorrectly or not cascade when it should. Form validation exists on the frontend but not on the backend, allowing invalid data to be submitted via direct API calls

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 Base44 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 — Base44 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 Base44 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.