doTwoTouch.js

var doTwoTouch = (function( _d, _q){ // Capture Pinch attempt on carousel
  var eCntr, aEv=[];
  setTimeout(function(){ 
    if( oTopmenu && oTopmenu.isMobile() ) doTwoTouch.init();
  }, 2800);
  return {
    "init": function(){
      eCntr = _d.querySelector( _q[0] );
      if( eCntr ){
        eCntr.addEventListener("pointerdown", doTwoTouch.twoTouchDown );
          eCntr.addEventListener("pointerup", doTwoTouch.twoTouchUp );
          eCntr.addEventListener("pointercancel", doTwoTouch.twoTouchUp );
          eCntr.addEventListener("pointerout", doTwoTouch.twoTouchUp );
          eCntr.addEventListener("pointerleave", doTwoTouch.twoTouchUp );
      }
    },
    "twoTouchDown": function( ev ){
      if( eCntr ){
        aEv.push( ev );
        if( aEv.length > 1) vltdc_productdetail.doTapToZoom();
      }
    },
    "twoTouchUp": function( ev ){
      if( eCntr ){
        aEv = aEv.filter(function( _ev ){
          return ( _ev.pointerId !== ev.pointerId ); });
      }
    }
  };
})( document, ["#js-flick__hero--id"] );

Determine if the user attempted to pinch zoom on a carousel image.