TypeScript Best Practices

Type Safety

• Enable strict: true in tsconfig.json — never disable strict checks in production code.
• Prefer unknown over any. If any is unavoidable, add a comment explaining why and narrow it immediately.
• Use satisfies to validate a value matches a type while preserving its narrowed literal type:

const config = {
    endpoint: "/api/users",
    timeout: 3000,
} satisfies Config;

• Prefer type narrowing (type guards, in operator, instanceof) over type assertions (as).

Type Inference