In this Hasty Treat, Scott and Wes continue a three-part series about old browsers, fallbacks and polyfills. In part two, they talk specifically about CSS Grid, Flexbox, new features and fallbacks, and how to use them.

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Show Notes 3:08 - CSS Grid and Flexbox

• Flexbox old spec
• Flexbox new spec
• CSS Grid
• Some popular options for supporting for supporting CSS Grid and/or Flexbox:
  • Just serve the mobile layout
  • Display block
  • Separate layout that you will eventually delete
• Can I Use
• Do websites need to look exactly the same in every browser?
• Modernizr
• CSS3, Please!
• Autoprefixer

12:38 - CSS Variables

• Double define
• Just like Grid, unknown def will be ignored and fallback to CSS
• CSS Houdini

17:00 - Fallback Code

• @supports
• Display block then display grid
• Feature Testing
• Detect the browser as a last resort

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