可折叠面板关闭时,Div高度不为零

Question

我有以下面板,当单击隐藏复选框的标签时显示其内容,并在再次单击时隐藏它们.

.collapse-panel {
    margin-bottom: 20px;
    border-bottom: 2px solid darkblue;
}

.collapse-panel > label {
    display: block;
    position: relative;
    top: -5px;
    height: 2px;
}

.collapse-panel > input {
    display: none;
}

.collapse-panel > label:before {
    content: 'vvv';
    float: left;
    padding: 2px;
    border: 1px solid darkblue;
    border-radius: 5px;
    font-family: "Lucida Console", Monaco, monospace;
    font-size: 8pt;
    font-weight: bold;
    color: deepskyblue;
    background-color: white;
    cursor: pointer;
}

.collapse-panel div.collapse-panel-content {
    display: inline-block;
    height: 0;
    margin: 0;
    overflow: hidden;
    white-space: nowrap;

    transition-property: all;
    transition-duration: 1.0s;
    transition-timing-function: ease-in-out;
}

.collapse-panel > input:checked ~ div.collapse-panel-content {
    height: 25px;
}

.collapse-panel > input:checked ~ label:before {
    content: '^^^';
    padding-top: 4px;
    padding-bottom: 0;
    font-size: 9pt;
}

div.collapse-panel-content > * {
    display: inline-block;
    float: right;
    max-width: 30px;
    margin: 5px;
}

<div class="collapse-panel">
    <input type="checkbox" name="" id="collapse_panel_checkbox">
    <div class="collapse-panel-content">
      <div style="height: 20px; width: 20px; background-color: red;">
      </div>
      <div style="height: 20px; width: 20px; background-color: green;">
      </div>
      <div style="height: 20px; width: 20px; background-color: blue;">
      </div>
    </div>
    <label for="collapse_panel_checkbox"></label>
</div>

但是,当关闭时,面板高度不为零; 它是20px.

如何在折叠时重构面板高度降至零？

Answer 1

设置font-size:0;为.collapse-panel,因为它包含inline-block元素,内联框从其块父元素继承可继承属性,并创建空格/边距.font-size:0;将删除这些空间.

.collapse-panel {
    margin-bottom: 20px;
    border-bottom: 2px solid darkblue;
    font-size:0;
}

.collapse-panel > label {
    display: block;
    position: relative;
    top: -5px;
    height: 2px;
}

.collapse-panel > input {
    display: none;
}

.collapse-panel > label:before {
    content: 'vvv';
    float: left;
    padding: 2px;
    border: 1px solid darkblue;
    border-radius: 5px;
    font-family: "Lucida Console", Monaco, monospace;
    font-size: 8pt;
    font-weight: bold;
    color: deepskyblue;
    background-color: white;
    cursor: pointer;
}

.collapse-panel div.collapse-panel-content {
    display: inline-block;
    height: 0;
    margin: 0;
    overflow: hidden;
    white-space: nowrap;

    transition-property: all;
    transition-duration: 1.0s;
    transition-timing-function: ease-in-out;
}

.collapse-panel > input:checked ~ div.collapse-panel-content {
    height: 25px;
}

.collapse-panel > input:checked ~ label:before {
    content: '^^^';
    padding-top: 4px;
    padding-bottom: 0;
    font-size: 9pt;
}

div.collapse-panel-content > * {
    display: inline-block;
    float: right;
    max-width: 30px;
    margin: 5px;
}

<div class="collapse-panel">
    <input type="checkbox" name="" id="collapse_panel_checkbox">
    <div class="collapse-panel-content">
      <div style="height: 20px; width: 20px; background-color: red;">
      </div>
      <div style="height: 20px; width: 20px; background-color: green;">
      </div>
      <div style="height: 20px; width: 20px; background-color: blue;">
      </div>
    </div>
    <label for="collapse_panel_checkbox"></label>
</div>

资源