Debugging in React Native: Tools at a Glance
Debugging in React Native
~8 Min. Lesezeit Zuletzt aktualisiert am August 8, 2026
A compact overview of the most important debugging tools, before we dive into concrete components and topics – you'll be able to use these techniques on practically every topic in this reference.
1. Description
React Native offers several levels for tracking down bugs: simple logging, the developer menu built right into the app, real breakpoint debugging in your editor, and a performance monitor for jank.
2. Short example
function ProductCard({ product }) {
console.log('Rendering product:', product.name);
return <Text>{product.name}</Text>;
}console.log() works identically to the browser – output appears in the terminal where npx expo start is running.
The developer menu
Shake the device ("shake gesture") or press Cmd+D in the simulator (iOS) or Cmd+M/Ctrl+M (Android) – the developer menu offers "Reload", "Open JS Debugger", and "Toggle Performance Monitor".
Breakpoints in your editor
- VS Code: install the "React Native Tools" extension, choose "Open JS Debugger" from the developer menu.
- WebStorm/PhpStorm: create your own React Native run configuration (Run > Edit Configurations > + > React Native), start it with the debug button instead of run.
Common error messages
| Error message | Most common cause |
|---|---|
| "Text strings must be rendered within a <Text> component" | loose text outside a <Text> |
| "Objects are not valid as a React child" | a whole object instead of a string/number was placed inside {{...}} |
| "Network request failed" | wrong API URL, or localhost instead of your computer's real IP address when testing on a real device |
Tipp: The fastest first debugging step is almost always: reload the app from the developer menu – many seemingly mysterious errors after code changes are just a stale JavaScript bundle cache.