Modern JavaScript Project

This lesson brings together the modern JavaScript concepts you have learned so far.

The goal of this project is not complexity, but understanding how real-world JavaScript code is structured and written today.

Project Overview

We will design a small but realistic feature:

• A modular JavaScript setup
• Clean ES6 syntax
• Reusable functions
• Asynchronous behavior

This reflects how modern front-end projects are built.

What Concepts Are Used?

• ES6 syntax
• let and const
• Arrow functions
• Template literals
• Modules
• Async / Await

You are not learning anything new here — you are applying what you already know.

Project Idea

We will create a simple user info display:

• Fetch user data
• Format it using template literals
• Display it on the page

This is a very common real-world pattern.

Step 1: Create a Data Module

This module is responsible for fetching data.

// data.js
export async function getUser() {
  return {
    name: "Alex",
    role: "Developer"
  };
}
  

Step 2: Create a UI Module

This module formats and displays the data.

// ui.js
export function renderUser(user) {
  return `
    
${user.name}
    
${user.role}
  `;
}
  

Step 3: Main Application File

The main file connects everything.

// app.js
import { getUser } from "./data.js";
import { renderUser } from "./ui.js";

async function init() {
  const user = await getUser();
  document.getElementById("app").innerHTML = renderUser(user);
}

init();
  

Why This Structure Matters

This approach:

• Keeps responsibilities separate
• Makes code easy to test
• Scales well as the app grows

This is how professional JavaScript projects are written.

Mini Challenges

Try extending this project:

• Add more user fields
• Simulate delayed data using setTimeout
• Handle loading and error states

These exercises build real confidence.

Common Mistakes

• Putting all logic in one file
• Overusing global variables
• Ignoring error handling

Structure matters as much as syntax.

What You Achieved

By completing this project, you:

• Used modern ES6 syntax
• Worked with modules
• Handled async logic
• Built a real-world structure

What Comes Next?

You have completed the Modern JavaScript section.

Next, we move deeper into JavaScript internals and object-oriented programming.