Restructuring Sample

destructuring-sample.js

// With out destructuring
function isPremium(user, role) {
  return (
    user &&
    user.membershipPlan &&
    user.membershipPlan.type === "PREMIUM" &&
    role === "CUSTOMER"
  );
}
// Usage;
const user = {
  id: "123",
  membershipPlan: { type: "BASIC" }
};

isPremium(user, "CUSTOMER");

// ===================================================================================

// With  destructuring
const isPremium = ({ membershipPlan = {}, role = membershipPlan.role } = {}) =>
  membershipPlan.type === "PREMIUM" && role === "CUSTOMER";

// Usage;
const user = {
  id: "123",
  membershipPlan: { type: "BASIC", role: "ADMIN" }
};
// Approach - 1
isPremium(user);

// Approach - 2
isPremium({ membershipPlan: { type: "BASIC", role: "ADMIN" } });

// Approach - 3
isPremium({ membershipPlan: { type: "BASIC" }, role: "ADMIN" });