https://redziaevents.com/js/jquery.detect_swipe.v2-1-3.1788259773.js

1/**
2 * jquery.detectSwipe v2.1.3
3 * jQuery Plugin to obtain touch gestures from iPhone, iPod Touch, iPad and Android
4 * http://github.com/marcandre/detect_swipe
5 * Based on touchwipe by Andreas Waltl, netCU Internetagentur (http://www.netcu.de)
6 */
7
8(function (factory) {
9    if (typeof define === 'function' && define.amd) {
10        // AMD. Register as an anonymous module.
11        define(['jquery'], factory);
12    } else if (typeof exports === 'object') {
13        // Node/CommonJS
14        module.exports = factory(require('jquery'));
15    } else {
16        // Browser globals
17        factory(jQuery);
18    }
19}(function($) {
20
21  $.detectSwipe = {
22    version: '2.1.2',
23    enabled: 'ontouchstart' in document.documentElement,
24    preventDefault: true,
25    threshold: 20
26  };
27
28  var startX,
29    startY,
30    isMoving = false;
31
32  function onTouchEnd() {
33    this.removeEventListener('touchmove', onTouchMove);
34    this.removeEventListener('touchend', onTouchEnd);
35    isMoving = false;
36  }
37
38  function onTouchMove(e) {
39    if ($.detectSwipe.preventDefault) { e.preventDefault(); }
40    if(isMoving) {
41      var x = e.touches[0].pageX;
42      var y = e.touches[0].pageY;
43      var dx = startX - x;
44      var dy = startY - y;
45      var dir;
46      var ratio = window.devicePixelRatio || 1;
47      if(Math.abs(dx) * ratio >= $.detectSwipe.threshold) {
48        dir = dx > 0 ? 'left' : 'right'
49      }
50      else if(Math.abs(dy) * ratio >= $.detectSwipe.threshold) {
51        dir = dy > 0 ? 'up' : 'down'
52      }
53      if(dir) {
54        onTouchEnd.call(this);
55        $(this).trigger('swipe', dir).trigger('swipe' + dir);
56      }
57    }
58  }
59
60  function onTouchStart(e) {
61    if (e.touches.length == 1) {
62      startX = e.touches[0].pageX;
63      startY = e.touches[0].pageY;
64      isMoving = true;
65      this.addEventListener('touchmove', onTouchMove, false);
66      this.addEventListener('touchend', onTouchEnd, false);
67    }
68  }
69
70  function setup() {
71    this.addEventListener && this.addEventListener('touchstart', onTouchStart, false);
72  }
73
74  function teardown() {
75    this.removeEventListener('touchstart', onTouchStart);
76  }
77
78  $.event.special.swipe = { setup: setup };
79
80  $.each(['left', 'up', 'down', 'right'], function () {
81    $.event.special['swipe' + this] = { setup: function(){
82      $(this).on('swipe', $.noop);
83    } };
84  });
85}));