Setup TypeScript Best Practices

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Code Style Rules

General Principles

• TypeScript: All code must be strictly typed, leverage TypeScript's type safety features

Code style rules

• Interfaces over types - use interfaces for object types
• Use enum for constant values, prefer them over string literals
• Export all types by default
• Use type guards instead of type assertions

Best Practices

Library-First Approach

• Common areas where libraries should be preferred:
  • Date/time manipulation → date-fns, dayjs
  • Form validation → joi, yup, zod
  • HTTP requests → axios, got
  • State management → Redux, MobX, Zustand
  • Utility functions → lodash, ramda

Code Quality

• Use destructuring of objects where possible:
  • Instead of const name = user.name use const { name } = user
  • Instead of const result = await getUser(userId) use const { data: user } = await getUser(userId)
  • Instead of const parseData = (data) => data.name use const parseData = ({ name }) => name
• Use ms package for time related configuration and environment variables, instead of multiplying numbers by 1000