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我這裏有下面的代碼示例：jQuery是在點擊動作時選擇錯誤的元素
$(document).ready(function() {
$('.children a.txtlink').on("click", function(e) {
// toggle the icons when the text link is pressed
jQuery(this).parent().find('ul:first').toggle(); // toggle the next UL
if (jQuery(this).parent().find('i').hasClass("fa-chevron-down")) {
jQuery(this).parent().find('i').removeClass("fa-chevron-down").addClass("fa-chevron-up");
} else {
jQuery(this).parent().find('i').removeClass("fa-chevron-up").addClass("fa-chevron-down");
}
e.stopPropagation();
e.preventDefault();
});
$('.children i.arrows').on("click", function(e) {
// toggle the icons when the chevron is pressed
jQuery(this).parent().find('ul:first').toggle(); // toggle the next UL
if (jQuery(this).hasClass("fa-chevron-down")) {
jQuery(this).removeClass("fa-chevron-down").addClass("fa-chevron-up");
} else {
jQuery(this).removeClass("fa-chevron-up").addClass("fa-chevron-down");
}
e.stopPropagation();
e.preventDefault();
});
});.navbar_menu {
background: #222222;
}
.menu {
border-top: 1px solid #2D2D2D;
}
.menu ul {
padding: 0;
margin: 0;
}
.menu li {
list-style: none;
position: relative;
}
.menu li i {
padding-right: 3px;
}
.menu a.txtlink {
color: #ccc;
display: block;
font-size: 16px;
padding: 10px;
padding-right: 0;
border-bottom: 1px solid #2D2D2D;
text-decoration: none;
}
.menu a.txtlink:hover {
background: #111111;
color: #ffffff;
text-decoration: none;
}
.menu li.home a.txtlink::before {
content: '\f015';
display: inline-block;
font: normal normal normal 14px/1 FontAwesome;
font-size: inherit;
text-rendering: auto;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
transform: none;
}
.menu ul li {
position: relative;
}
.menu ul li.children i.arrows {
/* needed to show an icon in the mobile menu */
position: absolute;
top: 0;
right: 0;
padding: 14px;
border-left: 1px solid #333333;
margin: 0;
cursor: pointer;
display: block;
color: #CCCCCC;
}
.menu .sub {
display: none;
}
.menu ul li ul li a.txtlink {
padding-left: 20px;
}
.menu ul li ul li ul li a.txtlink {
padding-left: 40px;
}
.menu i.arrows:hover {
background-color: #111111;
}
.menu ul li ul li {
background-color: #333333;
}<script src="https://code.jquery.com/jquery-3.2.0.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<nav class="navbar_menu">
<div class="menu">
<ul>
<li class="home"><a href="#" class="txtlink">Home</a></li>
<li class="children">
<a href="#" class="txtlink"><i class="fa fa-folder"></i>Menu 1</a>
<ul class="sub">
<li class="children">
<a href="#" class="txtlink"><i class="fa fa-search"></i>Menu 1.1</a>
<ul class="sub">
<li><a href="#" class="txtlink"><i class="fa fa-user"></i>Menu 1.1.1</a></li>
<li><a href="#" class="txtlink"><i class="fa fa-tag"></i>Menu 1.1.2</a></li>
</ul>
<i class="arrows fa fa-chevron-down"></i>
</li>
<li><a href="#" class="txtlink">Menu 1.2</a></li>
<li><a href="#" class="txtlink">Menu 1.3</a></li>
<li><a href="#" class="txtlink"><i class="fa fa-clock-o"></i>Menu 1.4</a></li>
<li><a href="#" class="txtlink"><i class="fa fa-search"></i>Menu 1.5</a></li>
</ul>
<i class="arrows fa fa-chevron-down"></i>
</li>
<li><a href="#" class="txtlink"><i class="fa "></i>Menu 2</a></li>
<li class="children">
<a href="#" class="txtlink"><i class="fa fa-folder"></i>Menu 3</a>
<ul class="sub">
<li class="children">
<a href="#" class="txtlink"><i class="fa fa fa-search"></i>Menu 3.1</a>
<ul class="sub">
<li><a href="#" class="txtlink"><i class="fa fa-user"></i>Menu 3.1.1</a></li>
<li><a href="#" class="txtlink"><i class="fa fa-bookmark-o"></i>Menu 3.1.2</a></li>
</ul>
<i class="arrows fa fa-chevron-down"></i>
</li>
<li><a href="#" class="txtlink"><i class="fa"></i>Menu 3.2</a></li>
<li><a href="#" class="txtlink"><i class="fa"></i>Menu 3.3</a></li>
<li><a href="#" class="txtlink"><i class="fa fa fa-calendar"></i>Menu 3.4</a></li>
<li><a href="#" class="txtlink"><i class="fa fa fa-search"></i>Menu 3.5</a></li>
</ul>
<i class="arrows fa fa-chevron-down"></i>
</li>
<li><a href="#" class="txtlink"><i class="fa fa-comments"></i>Menu 4</a></li>
</ul>
</div>
</nav>的問題是，當我用小箭頭展開工作正常/縮小菜單和箭頭交換正確。但是，當我點擊文本元素時，菜單中的圖標全部被箭頭替換。
示例：使用箭頭時，搜索圖標將保留在菜單中。當我點擊文本鏈接時，它被替換爲箭頭。
我想我在這裏使用了一個錯誤的jquery選擇器，但由於我對jquery很新，我無法修復它。那麼我的錯誤是什麼？
當我上的箭頭