首先，您必须使用mouseenter和mouseleave事件跟踪鼠标是在元素1内部还是外部。然后，您可以创建一个覆盖整个屏幕的element2来检测任何点击，并根据您是在element1内部还是外部做出相应的反应。

我强烈建议同时处理初始化和清理，出于明显的原因，element2应尽可能临时。

在下面的示例中，覆盖是位于某个位置的元素，可以通过单击内部来选择，也可以通过单击外部来取消选择。_init和_release方法是自动初始化/清理过程的一部分。该类继承自具有内部和外部元素的ClickOverlay，不用担心。我使用了outerElement.parentNode.appendChild来避免冲突。

import ClickOverlay from './ClickOverlay.js'

/* CSS */
// .unselect-helper {
//  position: fixed; left: -100vw; top: -100vh;
//  width: 200vw; height: 200vh;
// }
// .selected {outline: 1px solid black}

export default class ResizeOverlay extends ClickOverlay {
    _init(_opts) {
        this.enterListener = () => this.onEnter()
        this.innerElement.addEventListener('mouseenter', this.enterListener)
        this.leaveListener = () => this.onLeave()
        this.innerElement.addEventListener('mouseleave', this.leaveListener)
        this.selectListener = () => {
            if (this.unselectHelper)
                return
            this.unselectHelper = document.createElement('div')
            this.unselectHelper.classList.add('unselect-helper')
            this.unselectListener = () => {
                if (this.mouseInside)
                    return
                this.clearUnselectHelper()
                this.onUnselect()
            }
            this.unselectHelper.addEventListener('pointerdown'
                , this.unselectListener)
            this.outerElement.parentNode.appendChild(this.unselectHelper)
            this.onSelect()
        }
        this.innerElement.addEventListener('pointerup', this.selectListener)
    }

    _release() {
        this.innerElement.removeEventListener('mouseenter', this.enterListener)
        this.innerElement.removeEventListener('mouseleave', this.leaveListener)
        this.innerElement.removeEventListener('pointerup', this.selectListener)
        this.clearUnselectHelper()
    }

    clearUnselectHelper() {
        if (!this.unselectHelper)
            return
        this.unselectHelper.removeEventListener('pointerdown'
            , this.unselectListener)
        this.unselectHelper.remove()
        delete this.unselectListener
        delete this.unselectHelper
    }

    onEnter() {
        this.mouseInside = true
    }

    onLeave() {
        delete this.mouseInside
    }

    onSelect() {
        this.innerElement.classList.add('selected')
    }

    onUnselect() {
        this.innerElement.classList.remove('selected')
    }
}

这是我的代码：

// Listen to every click
$('html').click(function(event) {
    if ( $('#mypopupmenu').is(':visible') ) {
        if (event.target.id != 'click_this_to_show_mypopupmenu') {
            $('#mypopupmenu').hide();
        }
    }
});

// Listen to selector's clicks
$('#click_this_to_show_mypopupmenu').click(function() {

  // If the menu is visible, and you clicked the selector again we need to hide
  if ( $('#mypopupmenu').is(':visible') {
      $('#mypopupmenu').hide();
      return true;
  }

  // Else we need to show the popup menu
  $('#mypopupmenu').show();
});

对于那些希望将一个简短的解决方案集成到JS代码中的人来说——一个没有JQuery的小型库：

用法：

// demo code
var htmlElem = document.getElementById('my-element')
function doSomething(){ console.log('outside click') }

// use the lib
var removeListener = new elemOutsideClickListener(htmlElem, doSomething);

// deregister on your wished event
$scope.$on('$destroy', removeListener);

下面是库：

function elemOutsideClickListener (element, outsideClickFunc, insideClickFunc) {
   function onClickOutside (e) {
      var targetEl = e.target; // clicked element
      do {
         // click inside
         if (targetEl === element) {
            if (insideClickFunc) insideClickFunc();
            return;

         // Go up the DOM
         } else {
            targetEl = targetEl.parentNode;
         }
      } while (targetEl);

      // click outside
      if (!targetEl && outsideClickFunc) outsideClickFunc();
   }

   window.addEventListener('click', onClickOutside);

   return function () {
      window.removeEventListener('click', onClickOutside);
   };
}

我从这里获取代码并将其放在函数中：https://www.w3docs.com/snippets/javascript/how-to-detect-a-click-outside-an-element.html

Use:

var go = false;
$(document).click(function(){
    if(go){
        $('#divID').hide();
        go = false;
    }
})

$("#divID").mouseover(function(){
    go = false;
});

$("#divID").mouseout(function (){
    go = true;
});

$("btnID").click( function(){
    if($("#divID:visible").length==1)
        $("#divID").hide(); // Toggle
    $("#divID").show();
});

使用流中断、模糊/聚焦事件或任何其他棘手的技术，只需将事件流与元素的亲属关系匹配即可：

$(document).on("click.menu-outside", function(event){
    // Test if target and it's parent aren't #menuscontainer
    // That means the click event occur on other branch of document tree
    if(!$(event.target).parents().andSelf().is("#menuscontainer")){
        // Click outisde #menuscontainer
        // Hide the menus (but test if menus aren't already hidden)
    }
});

要删除事件侦听器外部的单击，只需执行以下操作：

$(document).off("click.menu-outside");

如果有人好奇这里是javascript解决方案（es6）：

window.addEventListener('mouseup', e => {
        if (e.target != yourDiv && e.target.parentNode != yourDiv) {
            yourDiv.classList.remove('show-menu');
            //or yourDiv.style.display = 'none';
        }
    })

和es5，以防万一：

window.addEventListener('mouseup', function (e) {
if (e.target != yourDiv && e.target.parentNode != yourDiv) {
    yourDiv.classList.remove('show-menu'); 
    //or yourDiv.style.display = 'none';
}

});