我有一些HTML菜单，当用户单击这些菜单的头部时，我会完全显示这些菜单。当用户在菜单区域外单击时，我希望隐藏这些元素。
jQuery是否可以实现这样的功能？
$("#menuscontainer").clickOutsideThisElement(function() {
// Hide the menus
});
当前回答
这里还有一个解决方案：
http://jsfiddle.net/zR76D/
用法：
<div onClick="$('#menu').toggle();$('#menu').clickOutside(function() { $(this).hide(); $(this).clickOutside('disable'); });">Open / Close Menu</div>
<div id="menu" style="display: none; border: 1px solid #000000; background: #660000;">I am a menu, whoa is me.</div>
插件：
(function($) {
var clickOutsideElements = [];
var clickListener = false;
$.fn.clickOutside = function(options, ignoreFirstClick) {
var that = this;
if (ignoreFirstClick == null) ignoreFirstClick = true;
if (options != "disable") {
for (var i in clickOutsideElements) {
if (clickOutsideElements[i].element[0] == $(this)[0]) return this;
}
clickOutsideElements.push({ element : this, clickDetected : ignoreFirstClick, fnc : (typeof(options) != "function") ? function() {} : options });
$(this).on("click.clickOutside", function(event) {
for (var i in clickOutsideElements) {
if (clickOutsideElements[i].element[0] == $(this)[0]) {
clickOutsideElements[i].clickDetected = true;
}
}
});
if (!clickListener) {
if (options != null && typeof(options) == "function") {
$('html').click(function() {
for (var i in clickOutsideElements) {
if (!clickOutsideElements[i].clickDetected) {
clickOutsideElements[i].fnc.call(that);
}
if (clickOutsideElements[i] != null) clickOutsideElements[i].clickDetected = false;
}
});
clickListener = true;
}
}
}
else {
$(this).off("click.clickoutside");
for (var i = 0; i < clickOutsideElements.length; ++i) {
if (clickOutsideElements[i].element[0] == $(this)[0]) {
clickOutsideElements.splice(i, 1);
}
}
}
return this;
}
})(jQuery);
其他回答
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>
检查窗口单击事件目标（它应该传播到窗口，只要它没有在其他地方被捕获），并确保它不是任何菜单元素。如果不是，那么你就在菜单之外。
或者检查单击的位置，看看它是否包含在菜单区域中。
这里还有一个解决方案：
http://jsfiddle.net/zR76D/
用法：
<div onClick="$('#menu').toggle();$('#menu').clickOutside(function() { $(this).hide(); $(this).clickOutside('disable'); });">Open / Close Menu</div>
<div id="menu" style="display: none; border: 1px solid #000000; background: #660000;">I am a menu, whoa is me.</div>
插件：
(function($) {
var clickOutsideElements = [];
var clickListener = false;
$.fn.clickOutside = function(options, ignoreFirstClick) {
var that = this;
if (ignoreFirstClick == null) ignoreFirstClick = true;
if (options != "disable") {
for (var i in clickOutsideElements) {
if (clickOutsideElements[i].element[0] == $(this)[0]) return this;
}
clickOutsideElements.push({ element : this, clickDetected : ignoreFirstClick, fnc : (typeof(options) != "function") ? function() {} : options });
$(this).on("click.clickOutside", function(event) {
for (var i in clickOutsideElements) {
if (clickOutsideElements[i].element[0] == $(this)[0]) {
clickOutsideElements[i].clickDetected = true;
}
}
});
if (!clickListener) {
if (options != null && typeof(options) == "function") {
$('html').click(function() {
for (var i in clickOutsideElements) {
if (!clickOutsideElements[i].clickDetected) {
clickOutsideElements[i].fnc.call(that);
}
if (clickOutsideElements[i] != null) clickOutsideElements[i].clickDetected = false;
}
});
clickListener = true;
}
}
}
else {
$(this).off("click.clickoutside");
for (var i = 0; i < clickOutsideElements.length; ++i) {
if (clickOutsideElements[i].element[0] == $(this)[0]) {
clickOutsideElements.splice(i, 1);
}
}
}
return this;
}
})(jQuery);
这是一个更通用的解决方案，它允许监视多个元素，并动态地从队列中添加和删除元素。
它保存一个全局队列（autoCloseQueue）——一个对象容器，用于在外部单击时应关闭的元素。
每个队列对象键都应该是DOM元素id，值应该是一个具有2个回调函数的对象：
{onPress: someCallbackFunction, onOutsidePress: anotherCallbackFunction}
将其放入文档就绪回调中：
window.autoCloseQueue = {}
$(document).click(function(event) {
for (id in autoCloseQueue){
var element = autoCloseQueue[id];
if ( ($(e.target).parents('#' + id).length) > 0) { // This is a click on the element (or its child element)
console.log('This is a click on an element (or its child element) with id: ' + id);
if (typeof element.onPress == 'function') element.onPress(event, id);
} else { //This is a click outside the element
console.log('This is a click outside the element with id: ' + id);
if (typeof element.onOutsidePress == 'function') element.onOutsidePress(event, id); //call the outside callback
delete autoCloseQueue[id]; //remove the element from the queue
}
}
});
然后，当创建id为“menuscontainer”的DOM元素时，只需将此对象添加到队列：
window.autoCloseQueue['menuscontainer'] = {onOutsidePress: clickOutsideThisElement}
我们实现了一个解决方案，部分基于上面用户的评论，这非常适合我们。我们使用它来隐藏搜索框/结果，当在这些元素之外单击时，不包括最初的元素。
// HIDE SEARCH BOX IF CLICKING OUTSIDE
$(document).click(function(event){
// IF NOT CLICKING THE SEARCH BOX OR ITS CONTENTS OR SEARCH ICON
if ($("#search-holder").is(":visible") && !$(event.target).is("#search-holder *, #search")) {
$("#search-holder").fadeOut('fast');
$("#search").removeClass('active');
}
});
它首先检查搜索框是否已经可见，在我们的例子中，它还删除了隐藏/显示搜索按钮上的活动类。
