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On iOS, mouse events are sent so quickly that the down or active state is never received. Therefore, the :active pseudo state is triggered only when there is a touch event set on the HTML element—for example, when ontouchstart is set on the element as follows:
By default, Safari Mobile does not use the :active state unless there is a touchstart event handler on the relevant element or on the <body>.
Fix CSS hover on iPhone/iPad/iPod
