HTML and CSS

• Document Object Model (DOM):
  • What is the DOM?
  • W3C: What is the DOM?
  • MDN: Introduction to the DOM

• HTML:
  • HTML

• CSS:
  • Box Model
  • Handbook
  • CSS Explained in Layman’s Terms (Good coverage of the basics: selectors, etc.)
  • CSS Selectors (W3C)
  • The 30 CSS Selectors You Must Memorize
  • CSS Object Model (CSSOM) 
  • CSS Isn’t Black Magic
  • CSS Flexbox and Grid Layout Models:
    • Flexbox:
      • CSS3 Flexbox: W3Schools
      • A Complete Guide to Flexbox
      • Understanding CSS3 Flexbox for Responsive Design
      • Visual Guide to  CSS Flexbox Properties
      • Flexbox Grid Finesse
      • Don’t use flexbox for overall page layout
    • Grid:
      • CSS3 Grid-View: W3Schools
      • A Complete Guide to Grid
      • Does Grid Replace Flexbox
      • Better, Simpler Grid Systems
      • Grid + Flexbox: the best 1-2 punch in web layout
  • CSS Rules

The Complete Guide to Being Faster in Chrome