Reactive data structures are intuitive and flexible. But they’re not always enough structure for complex client applications. How can we scale understandability? This talk presents three Vue.js techniques: partially applied utility functions, unmounted data-store components, and a hybrid technique that can give us the benefits of each. You’ll learn what each technique is good for — and where each can trip you up. Whether you use Vue or React or even JQuery day-to-day, you’ll come away with a better understanding of how to leverage reactivity for understandability when understandability gets hard.