经过研究，我找到了三种可行的解决方案

第一种解决方案

<script>
    //The good thing about this solution is it doesn't stop event propagation.

    var clickFlag = 0;
    $('body').on('click', function () {
        if(clickFlag == 0) {
            console.log('hide element here');
            /* Hide element here */
        }
        else {
            clickFlag=0;
        }
    });
    $('body').on('click','#testDiv', function (event) {
        clickFlag = 1;
        console.log('showed the element');
        /* Show the element */
    });
</script>

第二种解决方案

<script>
    $('body').on('click', function(e) {
        if($(e.target).closest('#testDiv').length == 0) {
           /* Hide dropdown here */
        }
    });
</script>

第三种解决方案

<script>
    var specifiedElement = document.getElementById('testDiv');
    document.addEventListener('click', function(event) {
        var isClickInside = specifiedElement.contains(event.target);
        if (isClickInside) {
          console.log('You clicked inside')
        }
        else {
          console.log('You clicked outside')
        }
    });
</script>

这种情况的简单解决方案是：

$(document).mouseup(function (e)
{
    var container = $("YOUR SELECTOR"); // Give you class or ID
    
    if (!container.is(e.target) &&            // If the target of the click is not the desired div or section
        container.has(e.target).length === 0) // ... nor a descendant-child of the container
    {
        container.hide();
    }
});

如果在div单击事件之外触发，上述脚本将隐藏div。

尝试以下代码：

if ($(event.target).parents().index($('#searchFormEdit')) == -1 &&
    $(event.target).parents().index($('.DynarchCalendar-topCont')) == -1 &&
    (_x < os.left || _x > (os.left + 570) || _y < os.top || _y > (os.top + 155)) &&
    isShowEditForm) {

    setVisibleEditForm(false);
}

这应该是有效的：

$('body').click(function (event) {
    var obj = $(event.target);
    obj = obj['context']; // context : clicked element inside body
    if ($(obj).attr('id') != "menuscontainer" && $('#menuscontainer').is(':visible') == true) {
        //hide menu
    }
});

外部点击插件！

用法：

$('.target-element').outsideClick(function(event){
    //code that fires when user clicks outside the element
    //event = the click event
    //$(this) = the '.target-element' that is firing this function 
}, '.excluded-element')

它的代码：

(function($) {

//when the user hits the escape key, it will trigger all outsideClick functions
$(document).on("keyup", function (e) {
    if (e.which == 27) $('body').click(); //escape key
});

//The actual plugin
$.fn.outsideClick = function(callback, exclusions) {
    var subject = this;

    //test if exclusions have been set
    var hasExclusions = typeof exclusions !== 'undefined';

    //switches click event with touch event if on a touch device
    var ClickOrTouchEvent = "ontouchend" in document ? "touchend" : "click";

    $('body').on(ClickOrTouchEvent, function(event) {
        //click target does not contain subject as a parent
        var clickedOutside = !$(event.target).closest(subject).length;

        //click target was on one of the excluded elements
        var clickedExclusion = $(event.target).closest(exclusions).length;

        var testSuccessful;

        if (hasExclusions) {
            testSuccessful = clickedOutside && !clickedExclusion;
        } else {
            testSuccessful = clickedOutside;
        }

        if(testSuccessful) {
            callback.call(subject, event);
        }
    });

    return this;
};

}(jQuery));

根据此答案改编https://stackoverflow.com/a/3028037/1611058

老实说，我不喜欢以前的任何解决方案。

要做到这一点，最好的方法是将“点击”事件绑定到文档，并比较该点击是否真的在元素之外（就像Art在建议中所说的那样）。

然而，您会遇到一些问题：您永远无法解除绑定，并且无法使用外部按钮打开/关闭该元素。

这就是为什么我编写了这个小插件（点击此处链接），以简化这些任务。能简单一点吗？

<a id='theButton' href="#">Toggle the menu</a><br/>
<div id='theMenu'>
    I should be toggled when the above menu is clicked,
    and hidden when user clicks outside.
</div>

<script>
$('#theButton').click(function(){
    $('#theMenu').slideDown();
});
$("#theMenu").dClickOutside({ ignoreList: $("#theButton") }, function(clickedObj){
    $(this).slideUp();
});
</script>