TypeScript Best Practices for 2024
Essential TypeScript patterns and practices that will make your code more maintainable and type-safe. Learn about strict mode, const assertions, and interface patterns.
#typescript
#javascript
#best practices
#programming
#type safety
#frontend
#code quality
TypeScript continues to evolve, and with it, the best practices for writing clean, type-safe code.
Essential Patterns
Strict Mode Always
Enable strict mode in your tsconfig.json:
{
"compilerOptions": {
"strict": true
}
}Use Const Assertions
For literal types and readonly arrays:
const ROLES = ['admin', 'user', 'guest'] as const;
type Role = typeof ROLES[number];Prefer Interfaces for Objects
Interfaces are extendable and can be merged:
interface User {
id: string;
name: string;
}
interface UserWithRole extends User {
role: Role;
}Conclusion
Following these patterns will help you write more maintainable and safer code. TypeScript’s type system is incredibly powerful when used correctly.