nl_tokens: this method is called on each input cycle and provides the preventing of the browser behavior
pl_tokens: function ( input ) { var srcEvent = input . srcEvent ; var <mask> = input . offsetDirection ; // if the touch action did prevented once this session if ( this . manager . session . prevented ) { srcEvent . preventDefault ( ) ; return ; } var actions = this . actions ; var hasNone = inStr ( actions , TOUCH_ACTION_NONE ) && ! TOUCH_ACTION_MAP [ TOUCH_ACTION_NONE ] ; var hasPanY = inStr ( actions , TOUCH_ACTION_PAN_Y ) && ! TOUCH_ACTION_MAP [ TOUCH_ACTION_PAN_Y ] ; var hasPanX = inStr ( actions , TOUCH_ACTION_PAN_X ) && ! TOUCH_ACTION_MAP [ TOUCH_ACTION_PAN_X ] ; if ( hasNone ) { //do not prevent defaults if this is a tap gesture var isTapPointer = input . pointers . length === 1 ; var isTapMovement = input . distance < 2 ; var isTapTouchTime = input . deltaTime < 250 ; if ( isTapPointer && isTapMovement && isTapTouchTime ) { return ; } } if ( hasPanX && hasPanY ) { // `pan-x pan-y` means browser handles all scrolling/panning, do not prevent return ; } if ( hasNone || hasPanY && direction & DIRECTION_HORIZONTAL || hasPanX && direction & DIRECTION_VERTICAL ) { return this . preventSrc ( srcEvent ) ; } }