A Tasty Treats Podcast for Web Developers.

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Wes Bos

Wes Bos

XL5G3 Full Stack JavaScript Developer. Creator of really good web development courses. BBQ enthusiast.

Scott Tolinski

Scott Tolinski

Web Developer, NX2V1, Creator of Level Up Tuts, Bboy, Robotops Crew and Youtuber

Playing: 087: Hasty Treat - Old Browsers, Fallbacks and Polyfills - Part 3



Oct 29th, 2018

Hasty Treat - Old Browsers, Fallbacks and Polyfills - Part 3

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In this Hasty Treat, Scott and Wes conclude a three-part series about old browsers, fallbacks and polyfills. In part three, they talk specifically about transpiling and polyfilling.

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Show Notes

2:20 - Polyfills and Transpile

5:18 - Back in the day

  • Border-radius htc hack
  • PNG fix for transparent PNGs
  • Flash for custom fonts
  • Cufon and SIFR

10:48 - JavaScript Polyfills

13:47 - JavaScript Transpile

  • Syntax is transpiled
  • babel-preset-env
  • Babel has plugins and presets
  • Meteor bundle to different browsers on demand
    • There are polyfills for most things, but performance can be an issue
  • Resize observer
  • Intersection Observer
    • Some things can’t be done with either
  • New browser APIs
  • Service workers, device access, inline video on old iOS, etc.

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