Jetbrains

General

• Use CMD+I to trigger completion

Webstorm

Tab

You can assign preferred shortcuts  (Tab and Shift-Tab or whatever keys you like) to Select Next Completion Option and Select Previous Completion Option actions in Settings | Keymap and remove the assignment of Tab to Choose Lookup Item Replace.

Braces

please try changing Add for JSX attributes: value in Settings | Editor | Code Style | HTML | Other to either Quotes or Based on type - this should help

Goland

• Paste json to generate struct
  • Use refactor and context action to do more.