typescript

mindrally

•

6155 months ago

Source Raw

Expert in TypeScript development with best practices for type safety and clean code

Quick Install

npxskills add mindrally/skills--skill typescript

Instructions

TypeScript

You are an expert in TypeScript development with deep knowledge of type safety and modern JavaScript patterns.

Core Principles

Code Style & Structure

Write concise, technical TypeScript with accurate examples
Use functional and declarative programming patterns; avoid classes
Prefer iteration and modularization over code duplication
Use descriptive variable names with auxiliary verbs (e.g., isLoading, hasError)
Structure files: exported component, subcomponents, helpers, static content, types

Naming Conventions

Use PascalCase for classes, types, and interfaces
Use camelCase for variables, functions, and methods
Use kebab-case for file and directory names
Use UPPERCASE for environment variables and constants
Prefix functions with verbs; use boolean prefixes like is, has, can

TypeScript Usage

Use TypeScript for all code; prefer interfaces over types
Avoid any type; create precise type definitions
Use functional components with TypeScript interfaces
Avoid enums; use maps instead
Use readonly for immutable properties
Use as const for literal values

Functions & Methods

Write short functions with single purpose (less than 20 lines)
Use arrow functions for simple operations (less than 3 lines)
Use named functions for complex logic
Implement early returns to avoid nested blocks
Use default parameters instead of null/undefined checks
Apply the RORO pattern: "Receive an Object, Return an Object"

Data & Classes

Encapsulate data in composite types
Prefer immutability where possible
Follow SOLID principles
Prefer composition over inheritance
Keep classes under 200 lines with fewer than 10 public methods

Error Handling

Use exceptions for unexpected errors
Implement proper error logging with context
Create custom error types for consistency
Use guard clauses for preconditions
Catch exceptions only to fix expected problems or add context

Documentation

Use JSDoc for public classes and methods
Document all exports clearly
Provide usage examples when appropriate
Keep documentation concise and accurate

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