This project won the first prize at Telegram Lightweight Client Contest and now is an official Telegram client. According to the original contest rules, it has nearly zero dependencies and is fully based on its own Teact framework (which re-implements React paradigm). It also uses a custom version of GramJS as an MTProto implementation.
The project incorporates lots of technologically advanced features, modern Web APIs and techniques: WebSockets, Web Workers and WebAssembly, multi-level caching and PWA, voice recording and media streaming, cryptography and raw binary data operations, optimistic and progressive interfaces, complicated CSS/Canvas/SVG animations, reactive data streams, and so much more.
💻 https://github.com/Ajaxy/telegram-tt
💬 https://web.telegram.org/a