Extended TypeScript (eTS) extends TypeScript by adding capabilities that work with the ArkUI framework, such as declarative UI and status management. With eTS, you will be able to develop high-performance applications in a simpler and more natural manner.
ArkUI is a declarative UI development framework for building HarmonyOS application UIs.
ArkCompiler is a unified programming platform developed by Huawei. Its key components include a compiler, toolchain, and runtime. By leveraging ArkCompiler, you'll be able to compile and run high-level programming languages on the multi-chip platform, and create applications and services that can run on a wide range of different devices, from phones and laptops, to tablets, TVs and wearables.