LESSON 31

Project: Build an Interactive Website

Learning objective: Build a small interactive web app using JavaScript.

Understand

Bring HTML, CSS, and JavaScript together into one interactive app.

Build something interactive — a to-do list, quiz, or tip calculator. Use DOM selection, events, functions, and localStorage so the app responds to the user and remembers data. This is the capstone of the Web Development path.

Analogy: This is where your three skills become a living product people can actually use.

See It in Action

A to-do app wires input, events, and storage together:

addBtn.addEventListener("click", () => {
  todos.push(input.value);
  render();
  save();
});
How it works: Clicking adds the input to an array, re-renders the list to the DOM, and saves it — combining every core JS skill.

Try It Yourself

  1. Choose a small app idea (to-do, quiz, or calculator).
  2. Handle user input with events and functions.
  3. Persist the data with localStorage and test a refresh.

Quick Quiz

What makes this project 'interactive'?

Challenge

Build a small interactive app that responds to the user and saves its data.

Success condition: Your app reacts to user input and keeps its data after a refresh.