This approach is used in SAP CRM Fiori. Suppose user Jerry has opened a given opportunity with ID = 3456 and clicked the Edit button: A read operation is fired and sent to ABAP backend: We can observe in Chrome development tool that the ETAG field of HTTP …

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  • https://blogs.sap.com/2018/02/07/two-kinds-of-edit-button-implementation-in-fiori/