The direction of mobile phone-side touch judgment

function load () {Document.addeventlistener (' Touchstart ', touch, false);     Document.addeventlistener (' Touchmove ', touch, false);         Document.addeventlistener (' touchend ', touch, false);         function Touch (event) {var event = Event | | window.event;     var oinp = document.getElementById ("InP");    var distance,clientx_start,clientx_end, minrange=10;    This.clientx_start;    This.direction;    This.callbackfun=function () {if (this.direction== ' ltr ') {Console.log (' left to right ');     } else {Console.log (' from right to left ');                }} switch (Event.type) {case "Touchstart": clientx_start=event.touches[0].clientx;                This.clientx_start=clientx_start;             Break                Case "Touchend": This.callbackfun ();             Break                               Case "Touchmove": Event.preventdefault ();                Clientx_end = Event.changedtouches[0].clientx; Determine the direction of movement DistAnce=clientx_end-this.clientx_start;                if (this.clientx_start+minrange<clientx_end) {this.direction= ' ltr ';                } else if (this.clientx_start-minrange>clientx_end) {this.direction= ' RTL ';         } break; }}} window.addeventlistener (' Load ', load, false);

　　

The user's behavior has been monitored and the corresponding program can be executed by swiping the screen with a hand.

The direction of mobile phone-side touch judgment