Search⌘ K
AI Features
Home
Courses
Grokking Node.js Design Patterns for Interviews

Solution: Create a Fluent Pizza Order Builder

Explore how to implement a clean and fluent pizza order builder using the builder design pattern in Node.js. Learn to enforce required fields, support method chaining, and produce immutable order objects. This lesson guides you through structuring complex object assembly clearly and efficiently.

We'll cover the following...

Solution explanation

  • Lines 2–6: We initialize the builder’s internal state—size starts empty, toppings as an array, and note undefined—to capture user inputs cleanly.

  • Lines 8–21: We define fluent setter methods (withSize, addTopping, withNote) that update the respective fields and return this, allowing flexible chaining in any order.

  • Lines 24–26: In .build() ...