Javascript

"JavaScript is now a language every developer should know."
– Mike Loukides, Vice President of Content Strategy for O'Reilly Media

What is it?

• Programming language
• Runs within web browser
• Browser runs Javascript based upon events
• [Server-side language as well!]

What can it do?

Javascript provides programmatic access to virtually all aspects of a page.

• CSS properties
• Markup content
• Forms, communication to Server
• Add functionality

ECMAScript and JavaScript

The standard for JavaScript is called ECMAScript.

• ECMAScript v 5 (2009) and 5.1 (2011)
• ECMAScript v 6 (2015) -- you'll also see this as "ES6".