The web is rapidly evolving towards using more and more Single Page Applications / JavaScript driven websites and understanding the effects on SEO performance is key to be a successful technical SEO. Instead of depending on clients issues with SEO and debugging those, I used the 10 most popular JS frameworks myself and setup 10 websites. During the sessions I will share the expected and unexpected things that happened.

1. What I learned about SEO
from using the 10 most used
JS frameworks
Jan-Willem Bobbink // Notprovided.eu
SLIDESHARE.NET/11INTERNET
@JBOBBINK

3. 72%
28%
2016: My clients’ web stacks
No JS framework JS Framework

4. 35%
65%
2019: My clients’ web stacks
No JS framework JS Framework

5. Source: https://insights.stackoverflow.com/survey/2018#most-popular-technologies

7. #1
PREVENT RISKS? GO SSR!
100% SERVER SIDE RENDERING

9. Google:
Rendering on
the Web
Source:
https://developers.googl
e.com/web/updates/201
9/02/rendering-on-the-
web

10. Rendering on
the Web – The
SEO Version
Source:
https://www.notprovide
d.eu/rendering-on-the-
web-the-seo-version/

12. Source: https://ja.dev/entry/blog/nagayama/render-budget-en
Kazushi Nagayama -7th of
August 2019
“tl;dr: full client-side
rendering can still hinder
the searchability of a site,
especially for large-scale
web services.”

13. #2
TOOLS TO CHECK
WHAT GOOGLE RENDERS & WHAT NOT

14. Quickest way: Chrome -> select user agent
Chrome: https://developers.google.com/web/tools/chrome-devtools/device-mode/override-user-agent

16. Quickest way: plugin “View Rendered Source”
Chrome: https://chrome.google.com/webstore/detail/view-rendered-source/ejgngohbdedoabanmclafpkoogegdpob/

17. Owned domains: Google’s URL inspection tool

18. Owned domains: Google’s URL inspection tool

19. Non owned URLs: Google Rich Result tester

21. #3
MINIMAL REQUIREMENTS
FOR THE INITIAL HTML

27. Lazy loading can be tricky

28. #4
DATA PERSISTENCE RISKS
GOOGLEBOT IS NOT A REAL USER

30. COOKIES LOCAL STORAGE SESSION DATA

31. #5
UNIT TEST SSR
THINGS CAN BRAKE

32. Oops, SSR didn’t work anymore…

33. #6
THIRD PARTY RENDERING?
THINGS CAN BRAKE

34. Setup monitoring

35. HTTP request
Sends a
request for a
page
503 header
Serve a
header in
the
meanwhile
200 header
When 100%
sure
Update
headers once
ready

36. #7
PERFORMANCE
REDUCE JS

37. Think about real users’ performance

38. Reduce load for
slow connections

39. Reduce processes

40. https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjZrrSh0vXjAhU
B-aQKHTQ9Dn4QjRx6BAgBEAQ&url=https%3A%2F%2Ffullscale.io%2Fangular-8-new-
release-ivy-
rollout%2F&psig=AOvVaw2YXpQDRYAID7cTqWIs8Ocr&ust=1565435071081938

41. #8
CAN GOOGLE GET TO ALL JS?
MONITOR LOG FILES

42. Botify my friend

43. #9
ANALYTICS ISSUES
SSR CAN LOG DOUBLE PAGEVIEWS

44. Prevent SSR pageviews to load GA

45. #10
SSR SEO RISKS
THINK ABOUT THE EFFECTS

47. Caching
• Rich snippets and other
structured markup Google
uses can be outdated.

49. Use a tool like SEORadar.com
Tool: https://app.seoradar.com/seo_diff_urls?type=fvr

50. Use a tool like SEORadar.com
Tool: https://app.seoradar.com/seo_diff_urls?type=fvr

51. Thanks! See you at the bar :)
Jan-Willem Bobbink // Notprovided.eu
SLIDESHARE.NET/11INTERNET
@JBOBBINK

52. Photo credits
• JS Framework logos https://hackernoon.com/how-it-feels-to-learn-
javascript-in-2016-d3a717dd577f
• Taking a risk http://www.bbc.co.uk/learningenglish/features/6-
minute-english/ep-151217
• Spot the differences:https://www.rd.com/culture/spot-10-
differences-picture/
• Robot differences: https://www.youtube.com/watch?v=DEnjZijXlvA
• Point zero: https://99percentinvisible.org/article/point-zero-circling-
globe-central-city-zero-stones/
• Headings: https://imu.nl/assets/img/comp/imu.nl/heading-tags-
gebruiken-voor-seo-h1-h2-h3-20075-w800.jpg
• Mobile phones: https://fineartamerica.com/featured/old-mobile-
phones-public-health-england.html
• Angular Ivy: https://fullscale.io/angular-8-new-release-ivy-rollout/