javascript - 显示/隐藏图标折叠所有 div 的问题

Question

我有以下代码，其中包含一些嵌套的 DIV。

DIV 有 Plus 和 Minus Font Awesome 图标来展开和折叠它们。

您可以使用页面顶部的按钮来切换 DIV 的可见性。

蓝色按钮和/或加号/减号图标可以切换 parent 的可见性(Activities 和 Animals & Nature)。

绿色按钮切换“子”div 的可见性，其中包含子标题，例如 award-medal、event 等

我遇到的问题是，当涉及到使用绿色加/减图标切换子 div 的可见性时，如果您单击 award-medal 标题的绿色减号，它还会折叠 event 的 div。

我想知道是否有任何方法可以拆分那里的折叠功能，以便绿色切换按钮仍然像现在一样工作，但单个 gree 加/减图标控制图标所在的每个 div 的可见性相关。

我能理解为什么代码会像现在这样工作，但无法理解我必须如何更改 JS 代码才能实现我正在尝试做的事情。

$(document).ready(function() {
  $('.toggleparent').addClass('toggle-open');
  $('.heading > a').on('click', function(event){
	event.preventDefault();
	if ( $(this).find('i').hasClass('fa-minus') ) {
	  $(this).find('i').removeClass('fa-minus').addClass('fa-plus');
	  $(this).parent().parent().find('.submenu').css("display", "none");
	  $(this).parent().parent().find('.submenu').addClass('closed');
	  if ( $('.submenu.closed').length == $('.menu').length ) {
		$('.toggleparent').removeClass('toggle-open');
	  }
	}
	else if ( $(this).find('i').hasClass('fa-plus') ) {
	  $(this).find('i').removeClass('fa-plus').addClass('fa-minus');
	  $(this).parent().parent().find('.submenu').css("display", "block");
	  $(this).parent().parent().find('.submenu').removeClass('closed');
	  $('.toggleparent').addClass('toggle-open');
	}
  });
  $('.toggleparent').on('click', function(){
	if ( $(this).hasClass('toggle-open') ) {
	  $('.heading').each(function() {
		$(this).find('i').removeClass('fa-minus').addClass('fa-plus');
		$(this).parent().find('.submenu').css("display", "none");
		$(this).parent().parent().find('.submenu').addClass('closed');
	  });
	  $('.toggleparent').removeClass('toggle-open');
	}
	else{
	  $('.heading').each(function() {
		$(this).find('i').removeClass('fa-plus').addClass('fa-minus');
		$(this).parent().find('.submenu').css("display", "block");
		$(this).parent().parent().find('.submenu').removeClass('closed');
	  });
	  $('.toggleparent').addClass('toggle-open');
	}
  });
});



$(document).ready(function() {
  $('.togglechild').addClass('toggle-open');
  $('.subheading > a').on('click', function(event){
	event.preventDefault();
	if ( $(this).find('i').hasClass('fa-minus') ) {
	  $(this).find('i').removeClass('fa-minus').addClass('fa-plus');
	  $(this).parent().parent().find('.indent').css("display", "none");
	  $(this).parent().parent().find('.indent').addClass('closed');
	  if ( $('.indent.closed').length == $('.menu').length ) {
		$('.togglechild').removeClass('toggle-open');
	  }
	}
	else if ( $(this).find('i').hasClass('fa-plus') ) {
	  $(this).find('i').removeClass('fa-plus').addClass('fa-minus');
	  $(this).parent().parent().find('.indent').css("display", "block");
	  $(this).parent().parent().find('.indent').removeClass('closed');
	  $('.togglechild').addClass('toggle-open');
	}
  });
  $('.togglechild').on('click', function(){
	if ( $(this).hasClass('toggle-open') ) {
	  $('.subheading').each(function() {
		$(this).find('i').removeClass('fa-minus').addClass('fa-plus');
		$(this).parent().find('.indent').css("display", "none");
		$(this).parent().parent().find('.indent').addClass('closed');
	  });
	  $('.togglechild').removeClass('toggle-open');
	}
	else{
	  $('.subheading').each(function() {
		$(this).find('i').removeClass('fa-plus').addClass('fa-minus');
		$(this).parent().find('.indent').css("display", "block");
		$(this).parent().parent().find('.indent').removeClass('closed');
	  });
	  $('.togglechild').addClass('toggle-open');
	}
  });
});

body{
  background: #fff;
  margin-top:20px;
}

h1.heading {
  font: 'Oswald';
  text-transform: uppercase;
}

td { background: #f1f1f1; border-bottom:1px solid #ccc; border-right:1px solid #ccc; padding:20px; margin:5px; border-top:1px solid #fff; border-left:1px solid #fff; }



.wrappingmapping {
	margin:20px 0 0 20px;
	border-radius:85px;
	overflow:hidden;
	border:10px solid #fff;
	box-shadow:0 0 10px #999;
}


.menu {
  margin-bottom: 50px;
}

.submenu {
  padding: 20px;
background: repeating-linear-gradient(
  -45deg,
  #999,
  #999 10px,
  #888 10px,
  #888 20px
);
  border-radius: 2px;
}

.green {
	color:#28a745;
}

.heading {
  color: #000;
  background: #ccc;
  border-bottom: 1px solid #ccc;
  padding: 5px;
}

.subheading {
  background: #fff;
  padding-left: 10px;
  background: #f1f1f1;
  border-top: 1px solid #fff;
  font-size: 30px;
}

.indent {
  background: #fff;
  padding: 0px 20px 20px 20px;
}

.icon {
  width: 64px;
  height: 64px;
}

.gallery {
  width: 100%;
  *width: 99.94877049180327%;
  margin: 0;
  padding: 0;
}

.gallery.grid li {
  margin: 2px 5px;
}

.gallery.grid li {
  margin: 2px 5px;
  display: block;
}

.gallery.grid li:hover {
  background: #ccc;
}

.gallery.grid li {
  display: inline-block;
  border-top: 1px solid #eee;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  border-left: 1px solid #eee;
  padding: 6px;
  position: relative;
  -moz-box-sizing: border-box;
  border-radius: 3px 3px 3px 3px;
  background: #fff;
}

.gallery a {
  display: block;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">
  
  <div class="container-fluid">

		<div>
			<span class="toggleparent btn btn-primary btn-lg" data-selector="parent_">Toggle Parents</span>
			<span class="togglechild btn btn-success btn-lg" data-selector="child_">Toggle Children</span>
		</div>

		<hr />

		<!-- parent start -->
<div id="activities" class="menu">
	<h1 class="heading">
		<a href="#"><i class="fa fa-minus" aria-hidden="true"></i></a> Activities <span style="color:#ccc;"> [57] </span>
	</h1>
	<div id="parent_activities" class="submenu">
		<!-- child start -->
		<h4 class="subheading">
			<a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> award-medal <span style="color:#ccc;"> [6] </span>
		</h4>
		<div id="child_award-medal" class="indent">
			<ul class="gallery grid">
				<li>
					<a href="#"><img title="military medal - 🎖️" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f396.svg" class="icon" role="presentation"></a>
				</li>
			</ul>
		</div>	<!-- /indent --> 
		<!-- child start -->
		<h4 class="subheading">
			<a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> event <span style="color:#ccc;"> [19] </span>
		</h4>
		<div id="child_event" class="indent">
			<ul class="gallery grid">
				<li>
					<a href="#"><img title="jack-o-lantern - 🎃" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f383.svg" class="icon" role="presentation"></a>
				</li>
			</ul>
		</div>	<!-- /indent --> 
	</div> <!-- /submenu --> 
</div> <!-- /menu --> 
<!-- parent end -->




<!-- parent start -->
<div id="animals-nature" class="menu">
	<h1 class="heading">
		<a href="#"><i class="fa fa-minus" aria-hidden="true"></i></a> Animals & Nature <span style="color:#ccc;"> [106] </span>
	</h1>
	<div id="parent_animals-nature" class="submenu">
		<!-- child start -->
		<h4 class="subheading">
			<a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> animal-amphibian <span style="color:#ccc;"> [1] </span>
		</h4>
		<div id="child_animal-amphibian" class="indent">
			<ul class="gallery grid">
				<li>
					<a href="#"><img title="frog face - 🐸" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f438.svg" class="icon" role="presentation"></a>
				</li>
			</ul>
		</div>	<!-- /indent --> 
		<!-- child start -->
		<h4 class="subheading">
			<a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> animal-bird <span style="color:#ccc;"> [12] </span>
		</h4>
		<div id="child_animal-bird" class="indent">
			<ul class="gallery grid">
				<li>
					<a href="#"><img title="turkey - 🦃" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f983.svg" class="icon" role="presentation"></a>
				</li>
			</ul>
		</div>	<!-- /indent --> 
	</div> <!-- /submenu --> 
</div> <!-- /menu --> 
<!-- parent end -->




	</div>

Answer 1

因为 .parent().find('.indent') 它找到了所有 .indent，但是你需要找到的是 .next 元素与 .indent 类不是全部，所以你应该使用 .parent().next('.indent')。

$(document).ready(function() {
  $('.toggleparent').addClass('toggle-open');
  $('.heading > a').on('click', function(event) {
    event.preventDefault();
    if ($(this).find('i').hasClass('fa-minus')) {
      $(this).find('i').removeClass('fa-minus').addClass('fa-plus');
      $(this).parent().parent().find('.submenu').css("display", "none");
      $(this).parent().parent().find('.submenu').addClass('closed');
      if ($('.submenu.closed').length == $('.menu').length) {
        $('.toggleparent').removeClass('toggle-open');
      }
    } else if ($(this).find('i').hasClass('fa-plus')) {
      $(this).find('i').removeClass('fa-plus').addClass('fa-minus');
      $(this).parent().parent().find('.submenu').css("display", "block");
      $(this).parent().parent().find('.submenu').removeClass('closed');
      $('.toggleparent').addClass('toggle-open');
    }
  });
  $('.toggleparent').on('click', function() {
    if ($(this).hasClass('toggle-open')) {
      $('.heading').each(function() {
        $(this).find('i').removeClass('fa-minus').addClass('fa-plus');
        $(this).parent().find('.submenu').css("display", "none");
        $(this).parent().parent().find('.submenu').addClass('closed');
      });
      $('.toggleparent').removeClass('toggle-open');
    } else {
      $('.heading').each(function() {
        $(this).find('i').removeClass('fa-plus').addClass('fa-minus');
        $(this).parent().find('.submenu').css("display", "block");
        $(this).parent().parent().find('.submenu').removeClass('closed');
      });
      $('.toggleparent').addClass('toggle-open');
    }
  });
});



$(document).ready(function() {
  $('.togglechild').addClass('toggle-open');
  $('.subheading > a').on('click', function(event) {
    event.preventDefault();
    if ($(this).find('i').hasClass('fa-minus')) {
      $(this).find('i').removeClass('fa-minus').addClass('fa-plus');
      $(this).parent().next('.indent').css("display", "none");
      $(this).parent().next('.indent').addClass('closed');
      if ($('.indent.closed').length == $('.menu').length) {
        $('.togglechild').removeClass('toggle-open');
      }
    } else if ($(this).find('i').hasClass('fa-plus')) {
      $(this).find('i').removeClass('fa-plus').addClass('fa-minus');
      $(this).parent().next('.indent').css("display", "block");
      $(this).parent().next('.indent').removeClass('closed');
      $('.togglechild').addClass('toggle-open');
    }
  });
  $('.togglechild').on('click', function() {
    if ($(this).hasClass('toggle-open')) {
      $('.subheading').each(function() {
        $(this).find('i').removeClass('fa-minus').addClass('fa-plus');
        $(this).next('.indent').css("display", "none");
        $(this).next('.indent').addClass('closed');
      });
      $('.togglechild').removeClass('toggle-open');
    } else {
      $('.subheading').each(function() {
        $(this).find('i').removeClass('fa-plus').addClass('fa-minus');
        $(this).next('.indent').css("display", "block");
        $(this).next('.indent').removeClass('closed');
      });
      $('.togglechild').addClass('toggle-open');
    }
  });
});

body {
  background: #fff;
  margin-top: 20px;
}

h1.heading {
  font: 'Oswald';
  text-transform: uppercase;
}

td {
  background: #f1f1f1;
  border-bottom: 1px solid #ccc;
  border-right: 1px solid #ccc;
  padding: 20px;
  margin: 5px;
  border-top: 1px solid #fff;
  border-left: 1px solid #fff;
}

.wrappingmapping {
  margin: 20px 0 0 20px;
  border-radius: 85px;
  overflow: hidden;
  border: 10px solid #fff;
  box-shadow: 0 0 10px #999;
}

.menu {
  margin-bottom: 50px;
}

.submenu {
  padding: 20px;
  background: repeating-linear-gradient( -45deg, #999, #999 10px, #888 10px, #888 20px);
  border-radius: 2px;
}

.green {
  color: #28a745;
}

.heading {
  color: #000;
  background: #ccc;
  border-bottom: 1px solid #ccc;
  padding: 5px;
}

.subheading {
  background: #fff;
  padding-left: 10px;
  background: #f1f1f1;
  border-top: 1px solid #fff;
  font-size: 30px;
}

.indent {
  background: #fff;
  padding: 0px 20px 20px 20px;
}

.icon {
  width: 64px;
  height: 64px;
}

.gallery {
  width: 100%;
  *width: 99.94877049180327%;
  margin: 0;
  padding: 0;
}

.gallery.grid li {
  margin: 2px 5px;
}

.gallery.grid li {
  margin: 2px 5px;
  display: block;
}

.gallery.grid li:hover {
  background: #ccc;
}

.gallery.grid li {
  display: inline-block;
  border-top: 1px solid #eee;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  border-left: 1px solid #eee;
  padding: 6px;
  position: relative;
  -moz-box-sizing: border-box;
  border-radius: 3px 3px 3px 3px;
  background: #fff;
}

.gallery a {
  display: block;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">

<div class="container-fluid">

  <div>
    <span class="toggleparent btn btn-primary btn-lg" data-selector="parent_">Toggle Parents</span>
    <span class="togglechild btn btn-success btn-lg" data-selector="child_">Toggle Children</span>
  </div>

  <hr />

  <!-- parent start -->
  <div id="activities" class="menu">
    <h1 class="heading">
      <a href="#"><i class="fa fa-minus" aria-hidden="true"></i></a> Activities <span style="color:#ccc;"> [57] </span>
    </h1>
    <div id="parent_activities" class="submenu">
      <!-- child start -->
      <h4 class="subheading">
        <a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> award-medal <span style="color:#ccc;"> [6] </span>
      </h4>
      <div id="child_award-medal" class="indent">
        <ul class="gallery grid">
          <li>
            <a href="#"><img title="military medal - 🎖️" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f396.svg" class="icon" role="presentation"></a>
          </li>
        </ul>
      </div>
      <!-- /indent -->
      <!-- child start -->
      <h4 class="subheading">
        <a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> event <span style="color:#ccc;"> [19] </span>
      </h4>
      <div id="child_event" class="indent">
        <ul class="gallery grid">
          <li>
            <a href="#"><img title="jack-o-lantern - 🎃" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f383.svg" class="icon" role="presentation"></a>
          </li>
        </ul>
      </div>
      <!-- /indent -->
    </div>
    <!-- /submenu -->
  </div>
  <!-- /menu -->
  <!-- parent end -->




  <!-- parent start -->
  <div id="animals-nature" class="menu">
    <h1 class="heading">
      <a href="#"><i class="fa fa-minus" aria-hidden="true"></i></a> Animals & Nature <span style="color:#ccc;"> [106] </span>
    </h1>
    <div id="parent_animals-nature" class="submenu">
      <!-- child start -->
      <h4 class="subheading">
        <a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> animal-amphibian <span style="color:#ccc;"> [1] </span>
      </h4>
      <div id="child_animal-amphibian" class="indent">
        <ul class="gallery grid">
          <li>
            <a href="#"><img title="frog face - 🐸" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f438.svg" class="icon" role="presentation"></a>
          </li>
        </ul>
      </div>
      <!-- /indent -->
      <!-- child start -->
      <h4 class="subheading">
        <a href="#"><i class="fa fa-minus green" aria-hidden="true"></i></a> animal-bird <span style="color:#ccc;"> [12] </span>
      </h4>
      <div id="child_animal-bird" class="indent">
        <ul class="gallery grid">
          <li>
            <a href="#"><img title="turkey - 🦃" src="https://cdn.jsdelivr.net/emojione/assets/svg/1f983.svg" class="icon" role="presentation"></a>
          </li>
        </ul>
      </div>
      <!-- /indent -->
    </div>
    <!-- /submenu -->
  </div>
  <!-- /menu -->
  <!-- parent end -->




</div>