XirfadHub Roadmap
Frontend Developer Roadmap
Step 6 / 18180 min

JavaScript

Programming Essentials

Explanation

JavaScript makes pages interactive with variables, functions, arrays, objects, DOM updates, and async logic.

Code example

javascript
const button = document.querySelector("#count-btn");
const label = document.querySelector("#count");
let count = 0;

button.addEventListener("click", () => {
  count += 1;
  label.textContent = String(count);
});

async function loadPosts() {
  const response = await fetch("https://jsonplaceholder.typicode.com/posts");
  const posts = await response.json();
  console.log(posts.slice(0, 3));
}

loadPosts();

Helpful resources

Exercise

Build a counter and a todo list that add, toggle, and remove items with vanilla JavaScript.