Visualforce: Show a Toast in JavaScript, Improved Component Compatibility, and Postponed Critical Update

Use a new JavaScript function to show a toast message. The <apex:detail> and <apex:enhancedList> components have improved compatibility when working with custom objects. The maximum view state size has increased. The critical update that removes instance names from URLs has been postponed to Winter ’20.

For more information on features affected by these enhancements, refer to the Visualforce Developer’s Guide.