~/talk

Decrease your conversions – common ways to lock people out

on YouTube 48m
Talkat Frontend United 2018 · on Friday, 2018-06-01· [web-performance]

speaker

name:Stefan Judis
website:https://www.stefanjudis.com

resources

video:https://youtu.be/eWXOUaAap-c
slides:https://speakerdeck.com/stefanjudis/decrease-your-conversion-common-ways-to-lock-people-out

summary

Shows concrete losses and fixes: median image is ~800 KB so switching PNGs to JPEG or WebP and using picture element plus srcset cuts payload from cents per view to fractions, and median video blobs (~2 MB) shrink when GIF → MP4 or WebM. Performance tooling mentioned: Lighthouse, Brotli, and image encoders. Accessibility specifics include aria-live for AJAX cart updates, reduced‑motion handling, focus management, and use of dialog/inert to trap focus. Claims: 70% leave unusable sites and millions are excluded by bad design.

AI-written summary · about

chapters (21)

  1. 0:00Start
  2. 1:02Don't let a CMS get in the way of shipping software.
  3. 1:25CRO team (conversion rate optimization)
  4. 3:56Where will your next customer come from?
  5. 6:21Median image transfer size is 800KB
  6. 14:10What about text?
  7. 16:28BBC loses 10% of users for every additional second in load time.
  8. 17:1957 million AMERICANS WITH DISABILITIES
  9. 17:2971.1% OF DISABLED PEOPLE WILL LEAVE A SITE WHEN DIFFICULT TO USE
  10. 23:12Introducing the Accessibility In- spector in the Firefox Developer Tools
  11. 27:14Accessibility according to actual people with disabilities
  12. 27:3569 million AMERICANS WITH VESTIBULAR DISORDERS
  13. 29:09Inclusive design is not just for good, it's for good business
  14. 29:21How do you browse the web?
  15. 32:12PERCEIVABLE Users must be able to perceive the information being presented
  16. 33:07Semantic markup
  17. 37:38The modal is the boss battle in accessibility.
  18. 39:46VB Accessible content
  19. 42:08Accessible updates
  20. 43:17WAI-ARIA Authoring Practices
  21. 45:00For some people, an accessible internet literally makes a world of difference.

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