If you want to learn to create relatively simple online games using Javascript, then the HTML5 Game From Scratch Step By Step Learning JavaScript course is a great place to start.

Building websites is very useful for personal and professional growth. However, developing these skills can be difficult, ...

Learn HTML, CSS, and JavaScript and Build a Website, App, and Game Young Rewired State. Candlewick, $12.99 trade paper (208p) ISBN 978-0-7636-9276-6.