当包装变得不必要地宽时，<div>延伸
树的每一行嵌套在一个带有柔性显示的div中。 整棵树在一个固定宽度（200px）div内 - 灰色背景。
我希望所有的蓝色按钮只占用尽可能多的宽度以适应文本。 当文本包装成多行时，div伸展填满整行。 如果不为div设置一个固定的宽度，可以防止它？
https://jsfiddle.net/nLcgym5z/2/
<div class="filter-panel">
<div class="filter-tree">
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="tree-button">-</div>
<div class="filter-name selected">Karpaty</div>
</div>
</div>
<div class="filter-branch">
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="tree-button">-</div>
<div class="filter-name selected">Karpaty Zachodnie</div>
</div>
</div>
<div class="filter-branch">
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="tree-button">-</div>
<div class="filter-name">Zewnętrzne Karpaty Zachodnie</div>
</div>
</div>
<div class="filter-branch">
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="filter-name selected">Karpaty Austriacko-Morawskie</div>
</div>
</div>
<div class="applied-filters"></div>
</div>
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="filter-name selected">Karpaty Środkowomorawskie</div>
</div>
</div>
<div class="applied-filters"></div>
</div>
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="tree-button">+</div>
<div class="filter-name selected">Beskidy Zachodnie</div>
</div>
</div>
<div class="applied-filters"></div>
</div>
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="filter-name">Beskidy Środkowe</div>
</div>
</div>
<div class="applied-filters"></div>
</div>
</div>
</div>
</div>
</div>
<div class="filter-category">
<div class="filter-row-container">
<div class="filter-row">
<div class="tree-button-guide"></div>
<div class="filter-name">Karpaty Wschodnie</div>
</div>
</div>
</div>
</div>
</div>
</div>
CSS：
.filter-name {
font-size: 0.85em;
line-height: 1;
padding: 3px;
margin: 1px;
cursor: pointer;
user-select: none;
align-self: flex-start;
width: auto;
}
.filter-name:hover {
color: royalblue;
}
/* selected filter names - collapsed or open view */
.filter-name.selected {
background: royalblue;
border-radius: 4px;
color: white;
}
.filter-name.selected:hover {
background: #5179f1;
}
/* blue selected filters buttons - collapsed branch view */
.applied-filters {
display: flex;
flex-wrap: wrap;
margin-left: 10px;
}
/* Displays filter name, plus/minus button and button horizontal tree branch centered in a row */
.filter-row {
display: flex;
align-items: center;
}
.filter-branch {
margin-left: 12px;
position: relative;
}
/*Tree vertical branches display */
.filter-row,
.filter-category {
position: relative;
}
.filter-category:not(:last-child)::before {
z-index: 1;
content: '';
position: absolute;
top: -15px;
left: 0px;
bottom: 10px;
border-left: 1px solid royalblue;
}
.filter-category:last-child .filter-row-container .filter-row::before {
z-index: 1;
content: '';
position: absolute;
top: -15px;
left: 0px;
bottom: 50%;
border-left: 1px solid royalblue;
}
/* Tree horizontal branches display */
.tree-button-guide {
line-height: 0.6;
height: 1px;
width: 5px;
margin-right: 2px;
border-top: 1px solid royalblue;
flex-shrink: 0;
}
/* Plus / minus tree buttons */
div.tree-button {
z-index: 3;
font-size: 0.8em;
text-align: center;
line-height: 10px;
width: 10px;
height: 10px;
padding: 2px;
margin: 2px;
margin-left: -3px;
background-color: royalblue;
border-radius: 2px;
color: white;
cursor: pointer;
flex-shrink: 0;
}
body {
font-family: sans-serif;
font-size: 90%;
background-image:url("../img/bg.jpg");
background-size: cover;
background-attachment: fixed;
}
.filter-panel {
width: 200px;
background: lightgray;
}
添加以下内容：
.filter-name.selected {
flex: 0;
}
您可以将0％的弹性基础添加到所选项目中：
.filter-name.selected {
flex-basis: 0%;
}
不幸的是，这将迫使一些项目在必要之前换行。
更好的答案可能是将.filter-name元素中的蓝色框作为新的子元素：
<div class="filter-name"><span class="selected-item">Beskidy Zachodnie</span></div>
然后将bg颜色，填充和边框半径应用到该元素。 您可能还想将其设置为display: inline-block 。
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