Technology history for 21kschool.com
Stack size over time
From 17 detected technologies in Sep 2020 to 91 in Jun 2026 (peak 93).
Currently detected
- Google Font API since Sep 2020
- Google Tag Manager since Sep 2020
- jQuery since Sep 2020
- WordPress since Sep 2020
- Facebook since Sep 2020
- Font Awesome since Sep 2020
- Google Analytics since Sep 2020
- OWL Carousel since Sep 2020
- PHP since Sep 2020
- Apache HTTP Server since Sep 2020
- Bootstrap since Sep 2020
- jQuery Migrate since Sep 2020
- MySQL since Sep 2020
- React since Mar 2021
- Webpack since Mar 2021
- YouTube since Mar 2021
- Gatsby since Mar 2021
- Ubuntu since May 2021
- styled-components since Jun 2021
- Facebook Pixel since Jun 2021
- core-js since Sep 2021
- Taboola since Jan 2022
- cdnjs since Jan 2022
- Linkedin Insight Tag since Jan 2022
- Moment.js since Jan 2022
- Hotjar since Mar 2022
- Spotify Widgets since Mar 2022
- Microsoft Advertising since Mar 2022
- Microsoft Clarity since Mar 2022
- MoEngage since Mar 2022
- Tailwind CSS since Apr 2022
- Cloudflare since Jun 2022
- Google Workspace since Aug 2022
- Java since Aug 2022
- Vue.js since Aug 2022
- Zoho since Aug 2022
- Zoho Mail since Aug 2022
- GoDaddy since Aug 2022
- PWA since Aug 2022
- Amazon Web Services since Aug 2022
- Amazon SES since Aug 2022
- HSTS since Sep 2022
- Open Graph since Sep 2022
- Segment since Oct 2022
- Sendinblue since Jan 2023
- ClickCease since Feb 2023
- Headless UI since May 2023
- Imgix since May 2023
- HTTP/3 since May 2023
- Unpkg since May 2023
- Datadog since May 2023
- Render since Jun 2023
- VideoJS since Jun 2023
- Next.js since Jun 2023
- Node.js since Jun 2023
- Cloudflare Bot Management since Jun 2023
- Slick since Nov 2023
- Yoast SEO since Nov 2023
- jsDelivr since Nov 2023
- Lightbox since Nov 2023
- WhatsApp Business Chat since Dec 2023
- Google Maps since Apr 2025
- React Router since Apr 2025
- Recharts since Apr 2025
- Contentsquare since Jul 2025
- WordPress Multisite since Aug 2025
- Radix UI since Nov 2025
- Redis Object Cache since Nov 2025
- Redis since Nov 2025
- shadcn/ui since Nov 2025
- Bootstrap Icons since Jan 2026
- reCAPTCHA since Mar 2026
- Nginx since Mar 2026
- IIS since Apr 2026
- Quill since Apr 2026
- Google Sign-in since Apr 2026
- Raphael since Apr 2026
- Select2 since Apr 2026
- TypeScript since Apr 2026
- Windows Server since Apr 2026
- D3 since Apr 2026
- Dropzone since Apr 2026
- Facebook Login since Apr 2026
- DataTables since Apr 2026
- FullCalendar since Apr 2026
- Popper since Apr 2026
- Apple Sign-in since Apr 2026
- Caddy since Apr 2026
- Chart.js since Apr 2026
- CodeMirror since Apr 2026
- Microsoft ASP.NET since Apr 2026
Previously used
- Priority Hints Apr 2026 to Apr 2026 · 1 mo
- RSS Nov 2023 to Apr 2026 · 2 yrs
- a3 Lazy Load Apr 2025 to Mar 2026 · 11 mo
- jQuery CDN Nov 2024 to Mar 2026 · 1 yr
- Google Hosted Libraries Feb 2022 to Dec 2025 · 3 yrs
- Wheelio Sep 2021 to Oct 2021 · 1 mo
- Animate.css Sep 2020 to Feb 2021 · 5 mo
- prettyPhoto Sep 2020 to Feb 2021 · 5 mo
- WooCommerce Sep 2020 to Feb 2021 · 5 mo
- Twitter Emoji (Twemoji) Sep 2020 to Jan 2021 · 4 mo
Timeline
2026 3 added · 5 dropped
- dropped Priority Hints Jun 2026 · Performance
- dropped RSS Jun 2026 · Miscellaneous
- dropped a3 Lazy Load May 2026 · WordPress plugins
- dropped jQuery CDN May 2026 · CDN
- added Priority Hints Apr 2026 · Performance
- added reCAPTCHA Mar 2026 · Security
- dropped Google Hosted Libraries Feb 2026 · CDN
- added Bootstrap Icons Jan 2026 · Font scripts
2025 9 added · 1 dropped
- added Redis Nov 2025 · Databases
- added Redis Object Cache Nov 2025 · Caching
- added RSS Aug 2025 · Miscellaneous
- added WordPress Multisite Aug 2025 · Hosting
- added Contentsquare Jul 2025 · Analytics
- added Hotjar Jul 2025 · Analytics
- added Cloudflare Bot Management Jun 2025 · Security
- dropped RSS May 2025 · Miscellaneous
- added a3 Lazy Load Apr 2025 · WordPress plugins
- added RSS Mar 2025 · Miscellaneous
2024 2 added · 2 dropped
- added jQuery CDN Nov 2024 · CDN
- added OWL Carousel Nov 2024 · JavaScript libraries
- dropped Cloudflare Bot Management May 2024 · Security
- dropped RSS Apr 2024 · Miscellaneous
2023 13 added
- added WhatsApp Business Chat Dec 2023 · Live chat
- added cdnjs Nov 2023 · CDN
- added jQuery Migrate Nov 2023 · JavaScript libraries
- added jsDelivr Nov 2023 · CDN
- added Lightbox Nov 2023 · JavaScript libraries
- added RSS Nov 2023 · Miscellaneous
- added Slick Nov 2023 · JavaScript libraries
- added Yoast SEO Nov 2023 · SEO
- added HSTS May 2023 · Security
- added Java May 2023 · Programming languages
- added Vue.js May 2023 · JavaScript frameworks
- added ClickCease Feb 2023 · Security
- added Sendinblue Jan 2023 · Email
2022 21 added · 6 dropped · 1 switched
- dropped cdnjs Dec 2022 · CDN
- dropped Cloudflare Dec 2022 · CDN
- dropped Google Hosted Libraries Dec 2022 · CDN
- dropped Hotjar Dec 2022 · Analytics
- dropped Moment.js Dec 2022 · JavaScript libraries
- added Segment Oct 2022 · Customer data platform
- added HSTS Sep 2022 · Security
- added Open Graph Sep 2022 · Miscellaneous
- added Amazon SES Aug 2022 · Email
- added Amazon Web Services Aug 2022 · PaaS
- added GoDaddy Aug 2022 · Hosting
- added Google Workspace Aug 2022 · Email
- added PWA Aug 2022 · Miscellaneous
- added Zoho Aug 2022 · CRM
- added Zoho Mail Aug 2022 · Email
- added Cloudflare Jun 2022 · CDN
- dropped Tailwind CSS Jun 2022 · UI frameworks
- added Tailwind CSS Apr 2022 · UI frameworks
- added Hotjar Mar 2022 · Analytics
- added Microsoft Advertising Mar 2022 · Advertising
- added Microsoft Clarity Mar 2022 · Analytics
- added MoEngage Mar 2022 · Analytics
- switched Wheelio Spotify Widgets Mar 2022 · Widgets
- added Google Hosted Libraries Feb 2022 · CDN
- added cdnjs Jan 2022 · CDN
- added Linkedin Insight Tag Jan 2022 · Analytics
- added Moment.js Jan 2022 · JavaScript libraries
- added Taboola Jan 2022 · Advertising
2021 6 added · 9 dropped · 1 switched
- added core-js Sep 2021 · JavaScript libraries
- added Wheelio Sep 2021 · Widgets
- added Ubuntu May 2021 · Operating systems
- dropped Animate.css Apr 2021 · UI frameworks
- dropped Font Awesome Apr 2021 · Font scripts
- dropped jQuery Migrate Apr 2021 · JavaScript libraries
- dropped MySQL Apr 2021 · Databases
- dropped OWL Carousel Apr 2021 · Widgets
- dropped PHP Apr 2021 · Programming languages
- dropped prettyPhoto Apr 2021 · JavaScript libraries
- dropped WooCommerce Apr 2021 · Ecommerce
- dropped WordPress Apr 2021 · CMS
- added Gatsby Mar 2021 · JavaScript frameworks
- added React Mar 2021 · JavaScript frameworks
- switched Twitter Emoji (Twemoji) Webpack Mar 2021 · Miscellaneous
- added YouTube Mar 2021 · Video players