Understanding Flex Box Element Order Property

Flex Box Layout System provides DISPLAY ORDERING feature for flex element.The Syntax of this CSS property is order: <integer> .This property is for the flex element only and not for the container.This property changes the order of display of the element during Browser Painting time.But it does not effect the real elements ordering.In this Demo,"We will learn how to use this property and check its effect to tab-index and Nth child positioning using first and last child selector".This  demo...