jQuery implements the method of getting bound custom event elements_jquery

The example in this article describes the jQuery method of obtaining and binding custom event elements. Share it with everyone for your reference, the details are as follows:

(function ($) { // 自定义itemtab事件
$.fn.bind = function(types, data, fn) { // 重载jQuery.fn.bind方法，用来截获绑定自定义事件的元素
 if(typeof types == 'string' && 'itemtab' == types) {
 var itemTouchStart = -1; // touchstart位置
 var itemTouchMove = -1; // touchend位置，值为-1时表示未触发
 var itemTriggerDistance = 0; // 拖动距离阀值，若大于该值则为拖动列表，若小于等于该值则为点击列表项
 var itemMoved = false; // 列表是否为拖动状态
 $(this).bind('touchstart', function (event) {
  if(!event.originalEvent.touches.length) return true;
  itemMoved = false;
  itemTouchStart = event.originalEvent.touches[0].pageX; // 记录起始位置
 }).bind('touchmove', function (event) {
  if(!event.originalEvent.touches.length) return true;
  itemTouchMove = event.originalEvent.touches[0].pageX; // 当前拖动位置
  //console.log('touchmove:', itemTouchStart, itemTouchMove, itemMoved);
  if(Math.abs(itemTouchMove - itemTouchStart) > itemTriggerDistance) {
  itemMoved = true; // 列表被拖动
  }
 }).bind('touchend', function (event) {
  //console.log('itemMoved:', itemMoved);
  if(itemMoved) { // 列表被拖动过，非点击操作
  return true;
  }
  $(this).trigger('itemtab'); // 触发自定义事件
 });
 }
 return this.on( types, null, data, fn ); // 这种做法具有侵入性，多个类似的代码会相互覆盖，可采用深度复制方式调用原$.fn.bind方法
}
})(jQuery);

I hope this article will be helpful to everyone in jQuery programming.