j下拉菜单的查询问题

jQuery issue with drop down menu

本文关键字:问题 查询 下拉菜单      更新时间:2023-09-26

问题是:

  • 下拉menu(#sub-button)通过鼠标单击关闭,仅当单击可见#button时,它才应关闭
  • 例如,当我尝试打开第二个下拉菜单时menu(#sub-button2)单击第一个下拉菜单时应立即关闭#button2

网页代码:

<html>
<head>
<title>jquery ddm</title>
<style type="text/css">
#button {
    position:fixed;
    width:150px;
    height:40px;
    background-color:blue;
}
#sub-button {
    display: none;
    width:150px;
    height:30px;
    margin-top:41px;
    background-color:cyan;
}
#button2 {
    position:fixed;
    width:150px;
    height:40px;
background-color:orange;
}
#sub-button2 {
    display: none;
    width:150px;
    height:30px;
    margin-top:41px;
    background-color:aqua;
}
</style>
</head>
<body>
<div id="button">
        <div id="sub-button">6</div>
    </div>
<div style="clear:both"></div>
<div id="button2" style="margin-left:152px;">
        <div id="sub-button2">66</div>
    </div>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/toggle.js"></script>

和JS代码(切换.js):

var myTimeout;
// show/hide sub-button menu
$( "#button" ).click(function() {
    $( "#sub-button" ).toggle();
});
// if mouse out of button and sub-button divs - close sub-button after 860ms
$( "#button" ).mouseout(function() {
    myTimeout = setTimeout( "jQuery('#sub-button').hide();",860 );
});
// if timer that are about to close sub-button is launched, stop it
// by hover button or sub-button divs
$( "#button" ).mouseover(function() {
    clearTimeout(myTimeout);
});
var myTimeout2;
$( "#button2" ).click(function() {
    $( "#sub-button2" ).toggle();
});
$( "#button2" ).mouseout(function() {
    myTimeout2 = setTimeout( "jQuery('#sub-button2').hide();",860 );
});
$( "#button2" ).mouseover(function() {
    clearTimeout(myTimeout2);
});

第一个问题是子菜单是#button的子菜单,因此单击事件将冒泡到父级,并且将调用#button click事件的代码。

您可以通过测试原始点击目标来解决的第一个问题:

$( "#button" ).click(function(e) {
    if(e.target.id === 'button'){
        $( "#sub-button" ).toggle();
    }
});
第二个

问题是,在您的代码中,您在单击第二个按钮时不会关闭第一个按钮,反之亦然

您可以添加:

$("#button").click(function (e) {
    if (e.target.id === 'button') {
        $("#sub-button2").hide();
        $("#sub-button").toggle();
    }
});

虽然如果你以后要有更多的按钮,这个JS可以而且应该整理并提高效率,否则你冒着代码变得难以维护的风险。

这是小提琴

只需像这样更改您的 js:

var myTimeout;
// show/hide sub-button menu
$( "#button" ).click(function() {
    $("#sub-button2").hide();
    if (!$("#sub-button2").is(":visible")) $( "#sub-button" ).show();
});
// if mouse out of button and sub-button divs - close sub-button after 860ms
$( "#button" ).mouseout(function() {
myTimeout = setTimeout( "jQuery('#sub-button').hide();",860 );
});
// if timer that are about to close sub-button is launched, stop it
// by hover button or sub-button divs
$( "#button" ).mouseover(function() {
clearTimeout(myTimeout);
});
var myTimeout2;
$( "#button2" ).click(function() {
    if (!$("#sub-button2").is(":visible")) $( "#sub-button2" ).show();
    $("#sub-button").hide();
});
$( "#button2" ).mouseout(function() {
myTimeout2 = setTimeout( "jQuery('#sub-button2').hide();",860 );
});
$( "#button2" ).mouseover(function() {
clearTimeout(myTimeout2);
});
如果我

理解正确,您希望防止事件气泡到父级,如果您单击菜单,请隐藏其他菜单子菜单。 无需做一堆"检查",只需正确处理事件即可。 请注意我在下面评论"添加"的位置

赶紧看实际的例子:http://jsfiddle.net/gP4CV/

var myTimeout;
// show/hide sub-button menu
$("#button").click(function () {
    $("#sub-button").toggle();
    $("#sub-button2").hide();// ADD hide other child
});
// ADD prevent event bubble to parent
$("#sub-button, #sub-button2").click(function (e) {
    e.stopPropagation();
});
// if mouse out of button and sub-button divs - close sub-button after 860ms
$("#button").mouseout(function () {
    myTimeout = setTimeout("jQuery('#sub-button').hide();", 860);
});
// if timer that are about to close sub-button is launched, stop it
// by hover button or sub-button divs
$("#button").mouseover(function () {
    clearTimeout(myTimeout);
});
var myTimeout2;
$("#button2").click(function () {
    $("#sub-button2").toggle();
    $("#sub-button").hide(); // ADD hide other child
});
$("#button2").mouseout(function () {
    myTimeout2 = setTimeout("jQuery('#sub-button2').hide();", 860);
});
$("#button2").mouseover(function () {
    clearTimeout(myTimeout2);
});