TypeScript Best Practices for Modern Development

TypeScript has become the go-to choice for building robust JavaScript applications. Here are some essential best practices to follow.

1. Use Strict Mode

Always enable strict mode in your tsconfig.json:

{
  "compilerOptions": {
    "strict": true
  }
}

This enables all strict type-checking options and helps catch bugs early.

2. Avoid any Type

The any type defeats the purpose of TypeScript. Instead, use:

• unknown for truly unknown types
• Generic types for flexible but type-safe code
• Union types for multiple possible types

3. Leverage Type Inference

Let TypeScript infer types when possible:

// Good
const message = 'Hello World'

// Unnecessary
const message: string = 'Hello World'

4. Use Interfaces and Types Appropriately

• Use interface for object shapes
• Use type for unions, intersections, and primitives

Conclusion

Following these best practices will help you write better TypeScript code and avoid common pitfalls.