SAP Fiori Elements is a part of SAP Fiori which provides a consistent user experience based on design guidelines. It is a development tool with which developers can create SAP Fiori applications. SAP Fiori Elements depends on OData service and SAPUI5 library, and they provide a metadata-based approach to create SAP Fiori applications.
URL parameter sap-ui-xx-viewCache=falseis a parameter used in SAP Fiori Elements app. This parameter determines whether the application should cache previously loaded views. When the value of this parameter is true, the application caches the loaded views so that they can be reused in subsequent sessions. This improves the performance of the application because these views do not need to be fetched from the server each time. If the value of this parameter is false, the application will not cache the views and will reload them every time they are needed.
For developers, turning off view caching has some advantages. For example, a developer might want to see real-time changes they make to a view during development or debugging. If the views are cached, they may not see these changes immediately because the application may still be using the cached views. By setting sap-ui-xx-viewCache=false, they can ensure that a new view is loaded each time, thus seeing their changes immediately.
For example, suppose a developer is developing a workflow application with multiple steps. At each step, the application displays a different view. If the view is cached, then when the developer goes from the first step to the second step, and then back to the first step, the application may display the cached view of the first step instead of reloading this view. This can cause developers not to immediately see the changes they made on the first step view. However, if they were set in the URL sap-ui-xx-viewCache=false, then every time they navigated to the first step, the view would be reloaded and developers would see their changes immediately.
However, turning off view caching also has some disadvantages. Most obviously, each view load requires data to be fetched from the server, which can increase network traffic and slow down the performance of the application. Therefore, developers need to decide whether to turn off view caching according to their needs.
Collectively, sap-ui-xx-viewCache=falseparameters allow developers to control the view caching behavior of SAP Fiori Elements applications. This is useful for live changes during development and debugging, but may degrade the performance of your application. Therefore, developers need to set this parameter according to their specific needs.