How to use capstone: build an interactive app in JavaScript

What to know about capstone: build an interactive app in JavaScript

Combine DOM updates, events, APIs, and state to create a practical app such as a task manager, calculator, or product dashboard. This chapter explains the concept, demonstrates a practical example, and gives you a guided exercise.

How to use capstone: build an interactive app in JavaScript

Start with a small function, make inputs and outputs explicit, and test both normal and edge cases. Use browser developer tools to inspect values and errors as you build.

Example: capstone: build an interactive app in JavaScript

Use this example as a starting point. Identify the part that controls the result, then adapt it to your own page or project.

const tasks = JSON.parse(localStorage.getItem("tasks") || "[]");
renderTasks(tasks);

Common questions about capstone: build an interactive app

When should I use capstone: build an interactive app?

Use this technique when it expresses the structure, styling, or behavior your page needs. Keep the implementation focused and test it with the surrounding content.

What should I practice next?

Build one small interaction that reads a value, validates it, updates the page, and handles an empty or invalid input.