Question

我有一个可变大小的侧边栏菜单。它有随机数量的菜单标题和项目。在此菜单之后，<div>应覆盖剩余的高度。

我尝试了this解决方案并且它会起作用，但<div class="menucell">元素上有一个填充（小提琴中的灰色空格）。

如何删除此填充？或者是否有更好的解决方案来完成这项任务？

.menurow {
    display: table-row;
    vertical-align: top;
    box-sizing: border-box;
}

.menucell {
    display: table-cell;
    padding: 0;
    vertical-align: top;
}

.menu {
    position: fixed;
    display: table;
    box-sizing: border-box;
    width: 300px;
    height: calc(100vh - 20px);
    background-color: rgba(0, 0, 0, 0.1);
}

.menuSubheader {
    height: 15px;
    padding: 8px 5px 8px 15px;
    font-size: 12px;
    line-height: 15px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: pointer;
    position: relative;
    background-color: rgba(0, 0, 255, 0.3);
}

.itemList {
    width: 300px;
    height: auto;
    z-index: 80;
    background-color: rgba(0, 0, 255, 0.1);
}

.item {
    height: 15px;
    padding: 5px 5px 5px 15px;
    background-color: rgba(255, 255, 255, 0.8);
}

.buffer {
    width: 300px;
    margin-top: 10px;
    overflow: hidden;
    text-align: center;
    display: table-cell;
    align-content: center;
    vertical-align: middle;
    color: rgba(211, 47, 47, 0.5);
    background-color: rgba(211, 47, 47, 0.1);
    border: 2px dashed rgba(211, 47, 47, 0.3);
}

<div class="menu">
    <div class="menurow">
        <div class="menucell">
            <div class="menuSubheader"><span>Header1</span></div>
            <div class="itemList">
                <div class="item"><span>Item</span></div>
                <div class="item"><span>Item</span></div>
                <div class="item"><span>Item</span></div>
            </div>
            <div class="menuSubheader"><span>Header2</span></div>
            <div class="itemList">
                <div class="item"><span>Item</span></div>
                <div class="item">
                   <span>Item</span>
                </div>
            </div>
            <div class="menuSubheader" data-visible="false"><span>Header3</span></div>
            <div class="itemList">
                <div class="item"><span>Item</span></div>
                <div class="item"><span>Item</span></div>
                <div class="item"><span>Item</span></div>
            </div>
        </div>
    </div>
    <div class="buffer">
      <span>please fill parent height</span>
    </div>
</div>

Answer 1

Flex确实是最简单的方法。

sin $ pi*x

flex-grow:1;或.menu { min-height: 100vh;/* or height */ display: flex; flex-direction: column; } .buffer { flex: 1; }简写是您需要应用于.buffer;）

这定义了Flex项目在必要时增长的能力。它接受一个无比的值作为一个比例。它规定了项目应占用的Flex容器内可用空间的大小。

下面的演示

＆＃13;

flex:1

＆＃13;

.menurow {}

.menucell {}

.menu {
  width: 300px;
  padding: 5px;
  background-color: rgba(0, 0, 0, 0.1);
  min-height: 100vh;/* here ============= or height */
  display: flex;/* here ============= */
  flex-direction: column;/* here =================*/
  box-sizing: border-box;
}

.menuSubheader {
  height: 30px;
  padding: 8px 5px 8px 15px;
  font-size: 18px;
  line-height: 30px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  background-color: rgba(0, 0, 255, 0.3);
}

.itemList {
  width: 300px;
  background-color: rgba(0, 0, 255, 0.1);
}

.item {
  height: 35px;
  padding: 5px 5px 5px 15px;
  background-color: rgba(255, 255, 255, 0.8);
}

.buffer {
  flex: 1;/* here ====================== */
  color: rgba(211, 47, 47, 0.5);
  background-color: rgba(211, 47, 47, 0.1);
  border: 2px dashed rgba(211, 47, 47, 0.3);
}

/* demo purpose */
.flex-center {
  display: flex;
  flex-flow: column;
  align-items: center;
  justify-content: center;
}

＆＃13;

如果您仍想使用表<div class="menu"> <div class="menurow"> <div class="menucell"> <div class="menuSubheader"><span>Header1</span></div> <div class="itemList"> <div class="item"><span>Item</span></div> <div class="item"><span>Item</span></div> <div class="item"><span>Item</span></div> </div> </div> </div> <div>And so on ....</div> <div class="buffer flex-center"> <span>please fill parent height</span> </div> </div>，则需要先编写一些CSS，您必须要注意容器及其直接子项：

display

下面的演示

＆＃13;

.menu {
  display: table;
  table-layout: fixed; /* to avoid expanding over width set */
  height: 100vh; /* acts like min-height */
}
.menurow {
  display: table-row;
  height: 1%;/* it will expand to fit content */
}

.menucell {
  display: table-cell; 
}
.buffer {
  height: 100%;
}

＆＃13;

.menu {
  display: table;
  table-layout: fixed; /* to avoid expanding over width set */
  height: 100vh; /* acts like min-height */
}
.menurow {
  display: table-row;
  height: 1%;/* it will expand to fit content */
}

.menucell {
  display: table-cell; 
}
.buffer {
  height: 100%;/* will expand within space left */
}

.menu {
  width: 300px;
  padding: 5px;
  background-color: rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
}

.menuSubheader {
  height: 30px;
  padding: 8px 5px 8px 15px;
  font-size: 18px;
  line-height: 30px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  background-color: rgba(0, 0, 255, 0.3);
}

.itemList {
  width: 300px;
  background-color: rgba(0, 0, 255, 0.1);
}

.item {
  height: 35px;
  padding: 5px 5px 5px 15px;
  background-color: rgba(255, 255, 255, 0.8);
}

.buffer {
  color: rgba(211, 47, 47, 0.5);
  background-color: rgba(211, 47, 47, 0.1);
  border: 2px dashed rgba(211, 47, 47, 0.3);
}

/* demo purpose */
.cell-center {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
}
body {
margin:0;
}

＆＃13;

以整页模式播放片段以测试行为

Answer 2

试试flexboxes :) 定位真的比桌子和旧的黑客更酷：

https://jsfiddle.net/5L9331m1/1/

我做了什么：

将您的.menu display切换为flex
将.menu flex-direction添加到column
添加.buffer height: 100%
将缓冲区元素设置为菜单元素。

无论如何，请查看：https://css-tricks.com/snippets/css/a-guide-to-flexbox/

希望这有帮助！

PS：我刚用垂直填充修复了问题，但你当然可以使用flexbox来重构你的整个菜单;）

在变量菜单后用元素填充剩余高度

2 个答案: