Intelligent Code Completion (Tab)

Cursor AI's intelligent code completion is a powerful productivity tool that not only provides traditional code suggestions but also understands context to offer smarter multi-line code suggestions.

Features

1. Context Awareness

• Real-time Analysis: Analyzes current file and related dependencies in real-time
• Smart Inference: Infers the most likely code completions based on context
• Type Awareness: Supports TypeScript type system, provides type-safe completions
• Project-wide Understanding: Analyzes the entire project structure and dependencies

2. Multi-line Completion

• Complete Function Body: Automatically completes entire function implementations
• Code Block Completion: Completes full code blocks (e.g., if-else, try-catch)
• Smart Indentation: Automatically handles code indentation and formatting
• Pattern Recognition: Recognizes common code patterns and provides complete implementations

3. Real-time Suggestions

• Instant Feedback: Displays suggestions in real-time as you type
• Multiple Options: Provides multiple completion options
• Quick Preview: Shows preview of completion results
• Smart Sorting: Sorts suggestions based on usage frequency and context relevance

Usage

1. Basic Operations

1. Trigger Completion

   • Auto-trigger: Automatically appears while typing
   • Manual trigger: Press Ctrl/Cmd + Space
   • Force trigger: Press Tab key

2. Accept Suggestions

   • Full accept: Press Tab key
   • Partial accept: Press Ctrl/Cmd + →
   • Cancel suggestion: Press Esc key
   • Smart accept: Press Enter key (intelligently judges based on context)

3. Switch Options

   • Previous: Shift + Tab
   • Next: Tab
   • Use arrow keys to navigate
   • Quick jump: Use number keys to select

2. Advanced Usage

Smart Function Completion

// Input function declaration, press Tab to auto-complete implementation
function calculateTotal(items: CartItem[]) {
  // Cursor will generate appropriate implementation
  // based on function name and parameter types
}

Import Statement Completion

// Start typing import, auto-complete module imports
import { useState, use
// Cursor will provide relevant React Hooks completions

Type Definition Completion

// Input interface definition, auto-complete properties
interface User
// Cursor will provide possible property definitions based on context

3. Completion Modes

Smart Mode

• Contextual Completion: Provides suggestions based on current file content
• Project-wide Completion: Analyzes entire project for suggestions
• Type-aware Completion: Provides accurate suggestions based on type system

Snippet Mode

• Custom Snippets: Supports user-defined code snippets
• Dynamic Snippets: Adjusts snippet content based on context
• Smart Variables: Automatically fills in relevant variable names

AI-enhanced Mode

• Semantic Understanding: Understands code intent to provide suggestions
• Pattern Recognition: Recognizes coding patterns for auto-completion
• Smart Refactoring: Provides code optimization suggestions

Configuration Options

1. Basic Settings

• Auto-trigger: Enable/disable auto-completion
• Delay Time: Adjust completion trigger delay
• Max Suggestions: Set number of suggestions to display
• Sorting Method: Configure suggestion sorting rules

2. Advanced Settings

• Completion Scope: Adjust completion search scope
• Exclude Files: Set file types to exclude from completion
• Custom Trigger Characters: Configure characters that trigger completion
• Intelligence Level: Adjust AI completion intelligence level

3. Language-specific Settings

• TypeScript: Type awareness and strict mode
• JavaScript: JSDoc support
• Other Languages: Language-specific completion rules
• Framework Support: Framework-specific completion rules

Best Practices

1. Improving Accuracy

• Write clear type definitions
• Maintain consistent code structure
• Use meaningful naming
• Keep project structure well-organized

2. Boosting Efficiency

• Master shortcut usage
• Make good use of partial completion
• Combine with code snippets
• Leverage smart mode

3. Avoiding Common Issues

• Verify completion results
• Be aware of performance impact
• Keep dependencies up-to-date
• Regularly optimize configurations

Tips and Tricks

1. Smart Completion Mode

1. History-based

   • Learns your coding style
   • Remembers common code patterns
   • Adapts to project-specific conventions
   • Optimizes for personal habits

2. Documentation-based

   • Uses API documentation for completion
   • Automatically imports required dependencies
   • Provides inline documentation
   • Smart documentation generation

3. Type-based

   • Strict type checking
   • Automatic type inference
   • Smart type completion
   • Type optimization suggestions

2. Special Scenario Applications

1. Async Code

// Type async, auto-complete async function structure
async function fetchData() {
  // Cursor will provide try-catch and error handling
}

2. React Components

// Type component name, auto-complete component structure
function UserProfile() {
  // Cursor will provide hooks and return structure
}

3. Test Code

// Type test, auto-complete test case structure
test('should handle user input', () => {
  // Cursor will provide test assertion structure
})

3. Advanced Application Scenarios

1. Complex Refactoring

   • Smart variable renaming
   • Code structure optimization
   • Design pattern application
   • Performance optimization suggestions

2. Team Collaboration

   • Unified code style
   • Follow naming conventions
   • Automatic documentation generation
   • Code review assistance

3. Debugging Assistance

   • Error handling completion
   • Log statement generation
   • Assertion completion
   • Test case generation

Troubleshooting

1. Common Issues

• Inaccurate completions: Check type definitions and dependencies
• Performance issues: Optimize project structure and configuration
• Conflict issues: Handle conflicts with other extensions
• Context recognition issues: Clear cache and reload

2. Optimization Suggestions

• Regularly clear cache
• Update language server
• Optimize project configuration
• Adjust completion settings

3. Performance Tuning

• Limit search scope
• Optimize trigger conditions
• Adjust caching strategy
• Configure file filtering

Tip

• Make full use of Tab key and arrow key combinations
• Pay attention to completion preview window
• Combine with code snippets to improve efficiency
• Leverage smart mode to boost productivity

Note

• Completion suggestions require manual review
• Large projects may need configuration optimization
• Some scenarios may require manual triggering
• Regularly update Cursor to get the latest features