Era 1: Start! (1970s - Early 1980s)
Era 1
Era 1 was the start of video games. The major consoles were Atari VCS, ColecoVision, and Mattel Intellivision.
Era 2: 8-bit (1983-1989)
Unlike CSS 2, which is a large single specification defining various features, CSS 3 is divided into several separate documents called "modules". Each module adds new capabilities or extends features defined in CSS 2, over preserving backward compatibility. Source: WikiPedia.org
Era 3: Bit Wars! (1989-1994)
Sass makes CSS fun again. Sass is an extension of CSS3, adding nested rules, variables, mixins, selector inheritance, and more. It's translated to well-formatted, standard CSS using the command line tool or a web-framework plugin.
Era 4: Transition (1995-2002)
Adobe Dreamweaver (formerly Macromedia Dreamweaver) is a proprietary web development application originally created by Macromedia. It is now developed by Adobe Systems, which acquired Macromedia in 2005.
Era 5: Next Generation (2003-current)
jQuery is a cross-browser JavaScript library designed to simplify the client-side scripting of HTML. It was released in January 2006 at BarCamp NYC by John Resig. Used by over 55% of the 10,000 most visited websites, jQuery is the most popular JavaScript library in use today.