Common Bugs in Trae-Generated Code

Trae generates code that assumes a local development environment where CORS and same-origin policies don't apply. It also tends to model server state as local component state, which breaks when the component unmounts and remounts

Trae apps frequently break on CORS when frontend and backend are deployed to different domains, since the development setup assumes same-origin. State management bugs appear when Trae uses React's useState for data that should live server-side, causing stale data after navigating between pages. Vue apps sometimes have reactivity issues where computed properties don't update after async state changes

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 Trae 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 — Trae 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 Trae 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.