JS how to determine whether the mobile phone and PC terminals choose different execution events

This article describes the method of JS to determine whether mobile phones and PCs can choose different execution events. Share it for your reference. The details are as follows:

Determine whether it is a mobile phone:

function isMobile(){
 var sUserAgent= (),
 bIsIpad= (/ipad/i) == "ipad",
 bIsIphoneOs= (/iphone os/i) == "iphone os",
 bIsMidp= (/midp/i) == "midp",
 bIsUc7= (/rv:1.2.3.4/i) == "rv:1.2.3.4",
 bIsUc= (/ucweb/i) == "ucweb",
 bIsAndroid= (/android/i) == "android",
 bIsCE= (/windows ce/i) == "windows ce",
 bIsWM= (/windows mobile/i) == "windows mobile",
 bIsWebview = (/webview/i) == "webview";
 return (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM);
}

To determine which event to use:

var touchStart,touchMove,touchEnd;
touchStart = isMobile() ? 'touchstart' : 'mousedown';
touchMove = isMobile() ? 'touchmove' : 'mousemove';
touchEnd = isMobile() ? 'touchend' : 'mouseup';

The corresponding handling of three events:

touchstart:function(e){
 var e=e || ; //To determine which event to use stopDefault(e);     //Different browsers have different default events methods to block browsers 
 if(isMobile()){     //If it's a mobile phone  var touch=[0];
  this.y1=
 }else{
  this.y1=;   //If it's not a mobile phone }
 this.y2=0;
 },
 touchmove:function(e){
 var e=e || ;
 stopDefault(e);
 if(isMobile()){
  var touch=[0];
  this.y2=;
 }else{
  this.y2=;
 }
 },

 touchend:function(e){
 var e=e || ;
 stopDefault(e);
 if(this.y2==0){
  return;
 }
 var diffY=this.y2-this.y1;
 if(diffY&gt;50){
  ();
 }else if(diffY&lt;-50){
  ();
 }
 this.y1=0,
 this.y2=0;
},

Block the browser's default event method:

function stopDefault(e){
  var e=e || ;
 if(){
 ();
 }else{
 =false;
 }
}

I hope this article will be helpful to everyone's JavaScript programming.