XirfadHub Roadmap
Full Stack Web Development
Step 5 / 21180 min

JavaScript Fundamentals

JavaScript Core

Explanation

Master variables, functions, arrays, objects, modules, and control flow — the language core for every web app.

Code example

javascript
const skills = ["HTML", "CSS", "JavaScript"];

function greet(name) {
  return `Hi ${name}, you know ${skills.length} skills.`;
}

const nextSkill = skills.map((skill) => skill.toUpperCase());
console.log(greet("Learner"), nextSkill);

Helpful resources

Exercise

Build a small skills tracker that adds, filters, and removes items with vanilla JS.