Let’s Learn JavaScript • Lesson 1 • Introduction

📅 July 13, 2017
• Have you ever submitted a form only to find that some fields will filled incorrectly with red borders? That is JavaScript in action.

• Have you scrolled through a list of images and noticed new images appear? That is JavaScript trying to make life easier for you while conserving bandwidth.

• Have you ever thrown up your hands in anger as annoying popups littered your desktop with mind-jarring, blinking ads accompanied by new browser windows that expand to fullscreen in order to advertise an online survey? That is JavaScript being used to aggravate in hopes that you will part with your money.

JavaScript is a full-featured programming language that produces web pages whose content can change when certain conditions are met. If you have ever wanted to learn how to perform this mysterious magic in JavaScript, then here is the first lesson that introduces the background of this fun language.