Js determines how different event execution methods are selected on mobile phones and PCs, jspc

Js determines how different event execution methods are selected on mobile phones and PCs, jspc

The example in this article describes how js judges different execution events on mobile phones and PCs. Share it with you for your reference. The details are as follows:

Determine whether it is a mobile phone:

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

Determine the event to use:

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

Corresponding Handling of three types of events:

Touchstart: function (e) {var e = e | window. event; // determine which event to use stopDefault (e); // different browsers prevent different if (isMobile ()) {// for mobile phone var touch = e. touches [0]; this. y1 = touch. pageY} else {this. y1 = e. pageY; // if it is not a mobile phone} this. y2 = 0 ;}, touchmove: function (e) {var e = e | window. event; stopDefault (e); if (isMobile () {var touch = e. touches [0]; this. y2 = touch. pageY;} else {this. y2 = e. pageY ;}, touchend: function (e) {var e = e | window. event; stopDefault (e); if (this. y2 = 0) {return;} var diffY = this. y2-this.y1; if (diffY> 50) {this. doNext ();} else if (diffY <-50) {this. doPrev ();} this. y1 = 0, this. y2 = 0 ;},

Default method to prevent browser events:

function stopDefault(e){  var e=e || window.event; if(e.preventDefault){ e.preventDefault(); }else{ e.returnValue=false; }}

I hope this article will help you design javascript programs.