Getting Started with JavaScript

• JavaScript - Mozilla Developer Center
• JS Reference (DevDocs)
• JavaScript Tutorial and Reference from w3schools.com
• JavaScript for Web Designers, a short book available online through the Harvard Library.
• Jennifer Robbins, 2018. Learning Web Design: A Beginner's Guide to HTML, CSS, JavaScript, and Web Graphics, 5th ed. O'Reilly Media. 500 p. ISBN 978-1491960202

Some basics

• JS in HTML.
  Including JavaScript in HTML with script element, with either src attribute or JS code.
• Variables.
  Declare variables with let and sometimes const.
  Though you will see the older var, which works but is not preferred.
• Console is your friend.
  Your browser developer tools will be critical to use, and especially the "Console". Log to the console in JS with

  console.log('hello there!');

• When is the code executed?
  script in head or right before the body close tag - </body>
  But it is good practice to rely on specific events!
• Events, Listeners, and Handlers
  load, click, focus, blur, submit, mouseover, mouseout, keypress.
  HTML attributes are available, but don't use these.
  Add event listeners through JavaScript!