Lets begin
What is UI5? UI5 is a framework developed by SAP which has large collection of libraries that you can use to build applications that run in a desktop and mobile browser – while only maintaining one code base. Using the SAPUI5 JavaScript toolkit, it’s easy to build HTML5 applications that are accessible and responsive without additional coding. Developing open source apps? You also get the benefits of responsive UIs with OpenUI5, the open source version of SAPUI5.