Questions about SAP Web IDE (Full-Stack or Personal) including official extensions such as SAP HAT.
"Web IDE" was an attempt by SAP SE to provide a cloud-based IDE with the goal to simplify end-to-end sap-fiori application development. With the extension SAP Web IDE Hybrid Application Toolkit (SAP HAT), developers were able to develop and maintain hybrid sapui5 apps as well.
For more information, see documentation.
Deprecation of SAP Web IDE and SAP HAT
SAP Web IDE was architectured based on now-outdated Eclipse Orion and Eclipse Che 3, with sapui5 as its custom UI layer. That approach turned out to be unscalable. In 2020, SAP decided to stop actively working on Web IDE and abandoned SAP HAT altogether in favor of sap-business-application-studio which is SAP's new cloud-based IDE based on Eclipse Theia.[1]
In place of SAP HAT, SAP now recommends SAP MTA or sap-cloud-platform SDK for either iOS or Android:[2]
When you start developing a new mobile app, we strongly recommend that you consider developing this with either MDK (Mobile Development Kit) for cross platform applications, or our native SDKs (SAP Cloud Platform SDK for iOS or SAP Cloud Platform SDK for Android).
[1] See TheiaDevCon 2019: "SAP Web IDE's Journey" (video).
[2] See FAQ and tips for developing hybrid apps with Hybrid App Toolkit.