Playing: 047: How to Get Better at Debugging
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May 23rd, 2018
How to Get Better at Debugging👇 Download Show✏️ Edit Show Notes
Scott and Wes detail the tips and tools you need to get better at debugging.
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- Read the stack trace
- Make sure you aren't debugging production
- Make sure you're not cached
- Check the network panel for the whole response
- CORS (Cross-Origin Resource Sharing)
- Use debugger commands in the browser
- Set breakpoints (race conditions)
- Use Source Maps
- Make full use of all console methods
- View your code in other browers
- Make sure your browser is up to date
- Step into and step over function
- Useful for especially tricky issues
- Look into Scope in dev tools panel
- Recreate it in CodePen or Create React App
- Helps to quarantine your code
- Verify where the problem actually is
- Take a break
- Helps clear your head and approach your problem from a different angle
- Rubber Duck Debugging
- Forcing yourself to talk it out will often reveal problems/issues
- Check Github issues / ask in Slack
- Leave your solution in the comments for others
- Use Node --inspect flag
- Read the code in your libs (if you can)
32:34 - Chrome Dev Tools Tabs Rundown
- 33:10 - Network tab
- 34:15 - Preformance tab
- 35:58 - Lesser known tools
- 36:15 - Firefox Grid Debug
- 36:20 - Firefox Fonts tab
- 37:10 - More tools (three dots menu in top right of Chrome Dev Tools window)
- 37:39 - Chrome Animations Inspector
- 38:34 - /dev tips & Modern DevTools Course
- 39:41 - Chrome & FF Layers for 3d and full view of canvas & window
- 40:51 - Sensors for overriding fake devices sensors
- Hot tip: Use Instagram on the desktop - Go to Instagram and set the user agent to iPad and it will work as it does on that actual device
- Hot tip: Get free internet on a plane ;) - If the airplane offers free internet for a certain device, change your user agent to that device and then switch back
- 43:12 - Favorite DevTools extensions
- 44:06 - Application/Storage tab
- 44:41 - FireFox Grid Inspector
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