cdnjs is a free distributed JS library delivery service.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Lucky Orange is a conversion optimisation tool with features including heatmaps, session recording, conversion funnels, form analytics, and chat.
Vercel is a cloud platform for static frontends and serverless functions.