Learn JavaScript for Beginners

Learn how to add JavaScript to a page using internal and external scripts, use script tags, and display messages with alert, sharing code across pages.

Learn about variables in JavaScript and declare them with var or let. Understand the difference between var and let, and see examples that assign values and display them with alert.

Explore arithmetic, comparison, and logical operators in JavaScript, learn how to perform calculations with variables, and evaluate true/false results using basic comparisons and logic.

Explore conditionals in JavaScript, including if, else, and else if, and learn to choose actions based on conditions. Practice with switch statements and example exercises.

Learn how loops in JavaScript repeat actions using while, do while, and for loops, with examples listing numbers 1 to 10 and separating even and odd results in the browser.

Learn how arrays in JavaScript store multiple values, access elements by index, and modify them with push and pop, while looping with for and displaying results with alert.

Learn how to write reusable JavaScript functions using the function keyword, parameters, and curly braces, then call them and compute an array’s average.

Discover how the document object model enables JavaScript to access and edit html elements, modify inner html and attributes, and create or remove elements and events.

Attach event listeners to DOM elements, handle click events on headings and buttons, and update on-screen text or trigger alerts. See how separating JavaScript from markup improves readability.

Learn how to build a practical background color flipper with JavaScript by wiring a button to cycle through a colors array using random indices, DOM access, and click events.

Learn to build a to-do list app in JavaScript by adding and deleting items, using document methods such as createElement, appendChild, and removeChild, and wiring up submit and delete events.

Learn core JavaScript fundamentals, including variable declaration using the for or let keyword, strict equality, semicolons, indexing starts at zero, logical and/or conditions, and debugging with the console.

Build a pixel art program in JavaScript that lets users set a table with columns and rows, render it, and color cells by clicking with a chosen color.

Solve the class project by building a pixel art table with html, css, and JavaScript, including color inputs and a submit action to render a centered grid with styled borders.