在两个弹性项目之间绘制箭头

Question

我希望在添加箭头时插入箭头（请运行代码）。必须在它们之间的每个添加的弹性项目的第一个弹性项目之后添加它，以便它们看起来通过箭头连接。箭头必须位于连接它们的框边界（不是框中心）的中点。

＆＃13;

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$('#clickMe').click(function() {
    $('#Demosss').append($('<li  class="flex-item">').text('text'))
    $(this).insertAfter($('[class^="flex-item"]').last());
});

$(document).on('click', '.flex-item' ,function(){
  $(this).toggleClass('flexActive')
})

＆＃13;

.flex-container {
    padding: 0;
    margin: 0;
    list-style: none;
    -webkit-flex-direction: row; /* Safari */
    flex-direction:  row;
    flex-wrap:  wrap;
}
.flex-item {
    background: green;
    padding: 5px;
    width: 100px;
    height: 150px;
    margin-top: 10px;
    margin-right: 15px;
    line-height: 150px;
    color: white;
    font-weight: bold;
    font-size: 3em;
    text-align: center;
    display: inline-block;
    
}
.flexActive{
  width:auto;
  display:block;
  flex: 1 1;
  margin-right:0;
}

ul li{
  display: inline;
}




.enlarge{
 zoom: 350%;
}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="Demosss" class="flex-container">

<!-- add LI here -->
</ul>


<button id="clickMe">Click Me</button>

<div class="enlarge">
<span>&#8674;</span>
</div>

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Answer 1

您可以使用箭头为style-loader的伪元素，并将其从第一个元素中排除，在CSS中使用content。

＆＃13;

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:not()

＆＃13;

$('#clickMe').click(function() {
    $('#Demosss').append($('<li  class="flex-item">').text('text'))
    $(this).insertAfter($('[class^="flex-item"]').last());
});

$(document).on('click', '.flex-item' ,function(){
  $(this).toggleClass('flexActive')
})

＆＃13;

.flex-container {
  padding: 0;
  margin: 0;
  list-style: none;
  -webkit-flex-direction: row;
  /* Safari */
  flex-direction: row;
  flex-wrap: wrap;
}

.flex-item {
  background: green;
  padding: 5px;
  width: 100px;
  height: 150px;
  margin-top: 10px;
  margin-right: 15px;
  line-height: 150px;
  color: white;
  font-weight: bold;
  font-size: 3em;
  text-align: center;
  display: inline-block;
  position: relative;
}

.flexActive {
  width: auto;
  display: block;
  flex: 1 1;
  margin-right: 0;
}

ul li {
  display: inline;
}

.flex-item:not(:first-child) {
  margin-left: .75em;
}

.flex-item:not(:first-child):before {
  content: '\21E2';
  color: black;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate(-100%, -50%);
  z-index: 1;
}

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Answer 2

删除块元素之间的水平边距，然后在检测到至少已添加一个块时，在每个插入的块之前有条件地附加箭头。

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var first = true

$('#clickMe').click(function() {
    var demos = $('#Demosss')
    if (!first) {
      demos.append('⇢')
    } else first = false
    demos.append($('<li class="flex-item">').text('text'))
    $(this).insertAfter($('.flex-item').last());
});

$(document).on('click', '.flex-item', function (){
  $(this).toggleClass('flexActive')
})

＆＃13;

.flex-container {
    padding: 0;
    margin: 0;
    list-style: none;
    -webkit-flex-direction: row; /* Safari */
    flex-direction:  row;
    flex-wrap:  wrap;
}
.flex-item {
    background: green;
    padding: 5px;
    width: 100px;
    height: 150px;
    margin-top: 10px;
    line-height: 150px;
    color: white;
    font-weight: bold;
    font-size: 3em;
    text-align: center;
    display: inline-block;
    
}
.flexActive{
  width:auto;
  display:block;
  flex: 1 1;
  margin-right:0;
}

ul li{
  display: inline;
}




.enlarge{
 zoom: 350%;
}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="Demosss" class="flex-container">

<!-- add LI here -->
</ul>


<button id="clickMe">Click Me</button>

<div class="enlarge">
</div>

＆＃13;

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Answer 3

尝试这样的事情。

$('#clickMe').click(function() {
		    $('#Demosss').append($('<li  class="flex-item">').text('text'))
		    $('.enlarge').css('display','none');
		    $('#Demosss').append($('<div class="enlarge1"><span>&#8674;</span></div>'))
		    $(this).insertAfter($('[class^="flex-item"]').last());
		});

		$(document).on('click', '.flex-item' ,function(){
		  $(this).toggleClass('flexActive')
		})

.flex-container {
	    padding: 0;
	    margin: 0;
	    list-style: none;
	    -webkit-flex-direction: row; /* Safari */
	    flex-direction:  row;
	    flex-wrap:  wrap;
	}
	.flex-item {
	    background: green;
	    padding: 5px;
	    width: 100px;
	    height: 150px;
	    margin-top: 10px;
	    margin-right: 15px;
	    line-height: 150px;
	    color: white;
	    font-weight: bold;
	    font-size: 3em;
	    text-align: center;
	    display: inline-block;
	    
	}
	.flexActive{
	  width:auto;
	  display:block;
	  flex: 1 1;
	  margin-right:0;
	}

	ul li{
	  display: inline;
	}


	.enlarge1{
		zoom: 350%;
	}

	.enlarge{
	 zoom: 350%;
	}

<!-- jQuery library -->
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>

	<!-- Latest compiled JavaScript -->
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<ul id="Demosss" class="flex-container">

	<!-- add LI here -->
	</ul>


	<button id="clickMe">Click Me</button>
	<div class="enlarge"><span>&#8674;</span></div>
	<div class="arrow">
	</div>