10 TypeScript Tips Every Developer Should Know

TypeScript has become the standard for modern JavaScript development. Here are 10 tips to level up your TypeScript skills.

1. Use Strict Mode

Always enable strict mode in your tsconfig.json:

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

2. Leverage Type Inference

Let TypeScript infer types when possible:

// Instead of
const name: string = "John";

// Just write
const name = "John"; // TypeScript knows it's a string

3. Use Union Types

type Status = "pending" | "approved" | "rejected";

4. Template Literal Types

type EventName = `on${Capitalize<string>}`;

5. Use satisfies Operator

const config = {
  port: 3000,
  host: "localhost"
} satisfies Config;

6-10: More Tips

• Use as const for literal types
• Leverage discriminated unions
• Use unknown instead of any
• Utilize utility types (Partial, Pick, Omit)
• Master generic constraints

Happy typing!