React DevTools

Inspect running React apps. See actual props, state, hooks - not just source code.

When to Use

Use these tools when:

• User says "why doesn't this update" or "state is wrong"
• Behavior doesn't match what code suggests
• Need to verify actual runtime values
• Debugging performance / excessive renders
• Exploring unfamiliar React codebase

Don't use when:

• Bug is obvious from source (missing dep, typo)
• Just need to read/edit files
• No React app is running

Setup Check