github-copilot-prompts ts.instructions.md

TypeScript Coding Best Practices

TypeScript-Specific Guidelines

• Prefer const and let over var for variable declarations.
• Use type annotations for function parameters, return types, and variables.
• Prefer interfaces over type aliases for object shapes.
• Avoid using any; use specific types or generics where possible.
• Use ES6+ features and syntax.

Formatting

• Use semicolons consistently.
• Use single quotes for strings, except when escaping is easier with double quotes.

Error Handling

• Use try/catch blocks for asynchronous code and handle errors gracefully.
• Avoid using bare catch clauses; specify the error type if possible.

Documentation

• Add JSDoc comments to all public classes, interfaces, functions, and methods.

Testing

• Write unit tests for all functions and classes.
• Use frameworks like Jest or Mocha.
• Name test files and functions clearly.

File and Directory Structure

• Use lowercase with hyphens for file and folder names.
• Organize code into modules and folders logically.
• Place executable code inside main or entry-point files.

Performance

• Profile and optimize only after identifying bottlenecks.
• Use built-in data structures and libraries where possible.

Version Control

• Commit code with clear, concise messages.
• Do not commit secrets or large binary files.