jquery implements the method of hiding the drop-down div and mask layer when clicking on other areas_jquery

The example in this article describes how jquery implements hiding the drop-down div and mask layer when clicking on other areas. Share it with everyone for your reference, the details are as follows:

For a better user experience, when doing a drop-down to obtain other pop-up layers, when expanding the drop-down, click on other areas to automatically hide the collapse drop-down and mask layers. This effect uses a piece of js That's it.

The following picture is an example of a drop-down menu for reference:

Effect implementation source code:

$(document).bind('click', function(e) {
  var e = e || window.event; //浏览器兼容性
  var elem = e.target || e.srcElement;
  while (elem) {
    //循环判断至跟节点，防止点击的是div子元素
    if (elem.id && elem.id == 'menu') {
      return;
    }
    elem = elem.parentNode;
  }
  //点击的不是div或其子元素
  $('.menuList,.overlay').hide();
});

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