Technology history for pbsbooks.org
Stack size over time
From 11 detected technologies in Sep 2020 to 37 in Jun 2026 (peak 40).
Currently detected
- Google Tag Manager since Sep 2020
- Google Analytics since Sep 2020
- MySQL since Sep 2020
- PHP since Sep 2020
- Twitter Emoji (Twemoji) since Sep 2020
- WordPress since Sep 2020
- jQuery since Sep 2020
- jQuery Migrate since Sep 2020
- Typekit since Feb 2021
- Modernizr since May 2021
- Lightbox since May 2021
- Bootstrap since May 2021
- GSAP since Aug 2023
- Open Graph since Aug 2023
- Vimeo since Aug 2023
- EmbedPlus since Aug 2023
- Nginx since Aug 2023
- OptinMonster since Aug 2023
- OptinMonster plugin since Aug 2023
- RSS since Aug 2023
- Swiper since Aug 2023
- The Events Calendar since Aug 2023
- Yoast SEO since Aug 2023
- Cloudflare since Aug 2023
- Isotope since Aug 2023
- Priority Hints since Feb 2024
- YouTube since Feb 2024
- HSTS since Mar 2024
- core-js since May 2024
- Facebook Pixel since May 2024
- Microsoft Clarity since May 2024
- Microsoft 365 since Feb 2025
- Fastly since Dec 2025
- Pantheon since Dec 2025
- MariaDB since Dec 2025
- New Relic since Dec 2025
- Varnish since Dec 2025
Previously used
- Google Font API May 2021 to Apr 2026 · 4 yrs
- React Aug 2023 to Apr 2026 · 2 yrs
- styled-components Aug 2023 to Apr 2026 · 2 yrs
- WP Rocket May 2021 to Nov 2025 · 4 yrs
- jQuery UI Aug 2023 to Oct 2024 · 1 yr
- Apache HTTP Server Sep 2020 to May 2021 · 8 mo
- Choices May 2021 to May 2021 · 1 mo
- Debian May 2021 to May 2021 · 1 mo
- Flickity Sep 2020 to Apr 2021 · 7 mo
- Slick Sep 2020 to Apr 2021 · 7 mo
- Slider Revolution Apr 2021 to Apr 2021 · 1 mo
Timeline
2026 3 added · 1 dropped · 2 switched
- dropped Google Font API Jun 2026 · Font scripts
- added Google Font API Apr 2026 · Font scripts
- switched styled-components React Apr 2026 · JavaScript frameworks
- switched React styled-components Apr 2026 · JavaScript frameworks
- added OptinMonster Jan 2026 · Marketing automation
- added OptinMonster plugin Jan 2026 · WordPress plugins
2025 11 added · 5 dropped · 1 switched
- added Fastly Dec 2025 · CDN
- added MariaDB Dec 2025 · Databases
- added New Relic Dec 2025 · RUM
- added Pantheon Dec 2025 · PaaS
- added Twitter Emoji (Twemoji) Dec 2025 · Font scripts
- switched WP Rocket Varnish Dec 2025 · Caching
- dropped OptinMonster Oct 2025 · Marketing automation
- dropped OptinMonster plugin Sep 2025 · WordPress plugins
- dropped Google Font API Aug 2025 · Font scripts
- dropped React Aug 2025 · JavaScript frameworks
- dropped styled-components Aug 2025 · JavaScript frameworks
- added Google Font API May 2025 · Font scripts
- added GSAP May 2025 · JavaScript frameworks
- added OptinMonster plugin May 2025 · WordPress plugins
- added React May 2025 · JavaScript frameworks
- added styled-components May 2025 · JavaScript frameworks
- added Microsoft 365 Feb 2025 · Webmail
2024 5 added · 7 dropped
- dropped jQuery UI Dec 2024 · JavaScript libraries
- added OptinMonster Dec 2024 · Marketing automation
- dropped OptinMonster Nov 2024 · Marketing automation
- dropped OptinMonster plugin Jun 2024 · WordPress plugins
- added core-js May 2024 · JavaScript libraries
- added Facebook Pixel May 2024 · Analytics
- dropped Google Font API May 2024 · Font scripts
- added Microsoft Clarity May 2024 · Analytics
- dropped React May 2024 · JavaScript frameworks
- dropped styled-components May 2024 · JavaScript frameworks
- dropped GSAP Apr 2024 · JavaScript frameworks
- added HSTS Mar 2024 · Security
2023 6 dropped
- dropped Apache HTTP Server Sep 2023 · Web servers
- dropped Choices Sep 2023 · Miscellaneous
- dropped Debian Sep 2023 · Operating systems
- dropped Flickity Aug 2023 · JavaScript libraries
- dropped Slick Aug 2023 · JavaScript libraries
- dropped Slider Revolution Aug 2023 · Miscellaneous
2021 9 added · 1 dropped
- added Bootstrap May 2021 · UI frameworks
- added Choices May 2021 · Miscellaneous
- added Debian May 2021 · Operating systems
- added Google Font API May 2021 · Font scripts
- added Lightbox May 2021 · JavaScript libraries
- added Modernizr May 2021 · JavaScript libraries
- added WP Rocket May 2021 · Caching
- added Slider Revolution Apr 2021 · Miscellaneous
- dropped Twitter Emoji (Twemoji) Mar 2021 · Miscellaneous
- added Typekit Feb 2021 · Font scripts