Inspect Element of macOS system App
I bet you know serveral native Apps on macOS is written in HTML.
Use these commands:
defaults write NSGlobalDomain WebKitDeveloperExtras -bool true
defaults write -g WebKitDeveloperExtras -bool YES
1
Open WebKitDeveloperExtras
Open your terminal and execute the two shell commands above.
2
Check element of macOS "native" Apps
Right click on a "native" App and select "Inspect Element".
