IntelliJ IDEA

This guide collects useful shortcuts, debugging tips, and workflow improvements for IntelliJ IDEA, especially for TypeScript/JavaScript projects.

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✍️ Editing & Multi-Cursor

• Select all occurrences in a file:
  Command + Control + G
  → Selects all instances of the highlighted word for bulk editing.

• Select next occurrence:
  Control + G
  → Adds the next occurrence of the selected word.

• Deselect last occurrence:
  Control + Shift + G
  → Removes the last selected occurrence.

JetBrains Guide: Select All Occurrences
JetBrains Guide: Multiple Occurrences

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🖥️ UI Scaling

• Zoom in IDE: Control + Option + =
• Zoom out IDE: Control + Option + -

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📂 Code Folding

• Collapse all methods: Command + Shift + -

• Uncollapse all methods: Command + Shift + =

• Collapse one method: Command + -

• Uncollapse one method: Command + =

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🐞 Debugging

• TypeScript Debugging:
  Right-click on a script inside package.json and select Debug.

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🧹 Code Quality & Formatting

• Fix ESLint Problems:
  Assign a custom shortcut in IntelliJ IDEA to automatically fix linting issues.

• Recommended Order:

  1. Optimize Imports
  2. Fix ESLint Problems

This avoids ESLint undoing optimizations.

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📝 Patch Management

• Create Patch from local changes (Menu: Git -> Patch -> Create Patch from Local Changes)

• Apply Patch to update codebase (Menu: Git -> Patch -> Apply Changes)

Patches can be copied to clipboard or saved as files.

⚡ Most Used Actions & Shortcuts (IntelliJ IDEA)

Here are some of the most frequently used commands to speed up your workflow:

Action	Shortcut (Mac)	Shortcut (Windows/Linux)
Format Code	Option + Command + L	Ctrl + Alt + L
Optimize Imports	Control + Option + O	Ctrl + Alt + O
Quick Suggestions / Intentions	Option + Enter	Alt + Enter
Find & Replace All Occurrences	Command + Control + G	Ctrl + Alt + Shift + J
Select Next Occurrence	Control + G	Ctrl + G
Deselect Last Occurrence	Control + Shift + G	Ctrl + Shift + G
Collapse All Methods	Command + Shift + -	Ctrl + Shift + -
Uncollapse All Methods	Command + Shift + =	Ctrl + Shift + +
Collapse Current Method	Command + -	Ctrl + -
Uncollapse Current Method	Command + =	Ctrl + +
Zoom In IDE	Control + Option + =	Ctrl + Mouse Wheel Up
Zoom Out IDE	Control + Option + -	Ctrl + Mouse Wheel Down

You can download the official IntelliJ IDEA keymap reference here:

IntelliJ Keymap (PDF)