There are several ways to develop OpenUI5 or SAPUI5 applications. Select the one that meets the requirements of your projects and your expectations best.
UI5 Tooling complements the framework as an open and modular toolchain. It comes with a command line interface (CLI) based on Node.js and npm.
For an application project which has not been enabled yet for UI5 Tooling, follow the concise Getting Started documentation for initial project setup.
The OpenUI5 sample application, available on GitHub, shows typical development steps in your application project. The full set of commands can be seen in the CLI documentation.
Consuming SAPUI5 libraries is made easy when leveraging the UI5 Tooling. It allows for automatically downloading all required framework dependencies of a project.
If you don't want to download the files and don't want to include them in your deployment, you can use the online version of OpenUI5 or SAPUI5 . For more information, see Variant for Bootstrapping from Content Delivery Network.