Parameters

Base parameters allow camelCase only. Destructured parameters allow camelCase or snake_case to preserve external API naming. All parameters can start with _ when intentionally unused.

Pages:

• Base
• Destructured

✅ Good

function fn(userId: string, _unused: any) {
  // WHY: camelCase and leading underscore for unused param
  return userId;
}

❌ Bad

function fn(user_id: string) {
  // WHY: snake_case not allowed for base parameters
  return user_id;
}