How to refer and import SAP-UI-Core.js within my SAPUI5 project

The SAPUI5 library files are a part of Eclipse SAPUI5 plug-in.

If you are running the app by using the Web App preview on the startup page ( Go to Run As -> select “Web APP Preview”), then eclipse starts a local HTTP server for development which serves at “/resources” the library.

Till the preview window is open, you can go ahead and use the URL in any browser of your choice to debug the application.