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
});
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
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");
其他回答
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}
功能:
$(function() {
$.fn.click_inout = function(clickin_handler, clickout_handler) {
var item = this;
var is_me = false;
item.click(function(event) {
clickin_handler(event);
is_me = true;
});
$(document).click(function(event) {
if (is_me) {
is_me = false;
} else {
clickout_handler(event);
}
});
return this;
}
});
用法:
this.input = $('<input>')
.click_inout(
function(event) { me.ShowTree(event); },
function() { me.Hide(); }
)
.appendTo(this.node);
功能非常简单:
ShowTree: function(event) {
this.data_span.show();
}
Hide: function() {
this.data_span.hide();
}
$(document).on('click.menu.hide', function(e){
if ( !$(e.target).closest('#my_menu').length ) {
$('#my_menu').find('ul').toggleClass('active', false);
}
});
$(document).on('click.menu.show', '#my_menu li', function(e){
$(this).find('ul').toggleClass('active');
});
div {
float: left;
}
ul {
padding: 0;
position: relative;
}
ul li {
padding: 5px 25px 5px 10px;
border: 1px solid silver;
cursor: pointer;
list-style: none;
margin-top: -1px;
white-space: nowrap;
}
ul li ul:before {
margin-right: -20px;
position: absolute;
top: -17px;
right: 0;
content: "\25BC";
}
ul li ul li {
visibility: hidden;
height: 0;
padding-top: 0;
padding-bottom: 0;
border-width: 0 0 1px 0;
}
ul li ul li:last-child {
border: none;
}
ul li ul.active:before {
content: "\25B2";
}
ul li ul.active li {
display: list-item;
visibility: visible;
height: inherit;
padding: 5px 25px 5px 10px;
}
<script src="https://code.jquery.com/jquery-2.1.4.js"></script>
<div>
<ul id="my_menu">
<li>Menu 1
<ul>
<li>subMenu 1</li>
<li>subMenu 2</li>
<li>subMenu 3</li>
<li>subMenu 4</li>
</ul>
</li>
<li>Menu 2
<ul>
<li>subMenu 1</li>
<li>subMenu 2</li>
<li>subMenu 3</li>
<li>subMenu 4</li>
</ul>
</li>
<li>Menu 3</li>
<li>Menu 4</li>
<li>Menu 5</li>
<li>Menu 6</li>
</ul>
</div>
这里是jsbin版本http://jsbin.com/xopacadeni/edit?html,css,js,输出
在文档上挂起一个单击事件侦听器。在事件侦听器中,您可以查看事件对象,特别是event.target,以查看单击了什么元素:
$(document).click(function(e){
if ($(e.target).closest("#menuscontainer").length == 0) {
// .closest can help you determine if the element
// or one of its ancestors is #menuscontainer
console.log("hide");
}
});
<div class="feedbackCont" onblur="hidefeedback();">
<div class="feedbackb" onclick="showfeedback();" ></div>
<div class="feedbackhide" tabindex="1"> </div>
</div>
function hidefeedback(){
$j(".feedbackhide").hide();
}
function showfeedback(){
$j(".feedbackhide").show();
$j(".feedbackCont").attr("tabindex",1).focus();
}
这是我想出的最简单的解决方案。