Returns whether the pointer associated with the event is the primary pointer for the current mouse, touch, or pen interaction.
This property is read-only.
bPrimary = object.isPrimary
Flag that indicates whether the pointer is the primary pointer.
The first contact in a multi-touch interaction is set as the primary pointer. Once a primary pointer is identified, all contacts must be lifted before a new contact can be identified as a primary pointer.
For apps or sites that don't process pointer input, only the primary pointer's events are promoted to mouse events. For more info about creating touch-enabled sites, see Guidelines for Building Touch-friendly Sites