What Is JavaScript? A Complete Beginner Guide
JavaScript is the programming language that brings web pages to life. Learn what it is, where it runs, and why every web developer starts here.
Master JavaScript from basics to advanced
JavaScript is the programming language that brings web pages to life. Learn what it is, where it runs, and why every web developer starts here.
A structured learning path for absolute beginners. Learn what to study first, how to practice, and which JavaScript concepts matter most when you are starting from zero.
JavaScript powers every interactive part of a website. Learn the real-world uses of JavaScript in web development, from form validation to full single-page applications.
JavaScript is both a frontend and backend language. Learn the difference between browser JavaScript and Node.js, what each is used for, and which one you should learn first.
From a 10-day prototype in 1995 to the most popular programming language in the world. Learn the full history of JavaScript, the browser wars, and how the web was transformed.
Learn what JavaScript strict mode is, how to enable it with 'use strict', and how it catches silent mistakes that would otherwise go unnoticed.
See the most common mistakes that JavaScript strict mode catches, including undeclared variables, read-only assignments, duplicate parameters, and more.
Learn how beginners can read JavaScript documentation without getting lost in syntax, parameters, return values, examples, and browser notes.
Variables are named containers that store data in your code. Learn what JavaScript variables are, how to create them, and how to use them with clear examples.
Learn the three steps of working with JavaScript variables: declaring them with let or const, assigning values, and using them in expressions and function calls.
var has three dangerous behaviors that cause silent bugs: function scoping, redeclaration without errors, and hoisting with undefined. Here is why let and const replaced it.
JavaScript is dynamically typed, meaning variables can hold any type of value and change types at runtime. Learn how dynamic typing works and how to use typeof.