jQuery.Tween.propHooks[ prop ] is a hook point that replaces jQuery.fx.step[ prop ] (which is being deprecated.) These hooks are used by the tween to get and set values on elements.
see
``
since
1.8
example
jQuery.Tween.propHooks[ property ] = {get:function( tween ) {// get tween.prop from tween.elem and return it},set:function( tween ) {// set tween.prop on tween.elem to tween.now + tween.unit}}
``
1.8