Cognitive Complexity

A VS Code extension that displays the cognitive complexity of JavaScript/TypeScript code in your status bar.

Features

• Real-time complexity scoring - Shows cognitive complexity score in status bar
• Visual complexity indicators - Dots indicate complexity levels (1-4 dots for increasing complexity)
• Inline hints - Click the status bar to toggle detailed complexity hints showing exactly what contributes to complexity
• Color-coded hints - Blue for low impact (+1), yellow for moderate (+2-3), red for high impact (+4+)

Supports JavaScript, TypeScript, JSX, and TSX files.

Usage

The extension automatically activates when you open JS/TS files. The status bar shows CC X where X is the complexity score, followed by visual indicators for complexity level.

Click the complexity indicator to toggle inline hints that show exactly which lines contribute to complexity and by how much.

Complexity Scoring

Based on cognitive complexity principles - counts decision points with nesting penalties for deeply nested code structures.