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I'm scaffolding a basic UI for a site using flexbox. Quite similar to the usual email layout.
For some reason the second children( class .main-body, lightseagreen color) of a column-layouted flexbox container(.content-main, plum color) has a bigger height than its parent, which I do not want it to.
I made a codepen snippet to show this behaviour.
html,
body {
width: 100%;
height: 100%;
background: lightblue;
box-sizing: border-box;
}
* {
box-sizing: border-box;
}
.container {
height: inherit;
background: PeachPuff;
padding: 1em;
display: flex;
max-height: 500px;
}
.sidebar {
flex: 0 1 15%;
background: khaki;
}
.content {
flex: 1 1 auto;
background: plum;
padding: 0.8em;
display: flex;
flex-direction: column;
}
.content-header {
background: lightgreen;
padding: 0.3em;
flex: 0 0 7%;
}
.content-main {
display: flex;
background: darkseagreen;
padding: 1em;
height: 100%;
flex: 1 1 auto;
}
.main-list {
flex: 0 0 12%;
background: lightcoral;
}
.main-body {
flex: 0 1 auto;
padding: 1em;
background: lightcyan;
display: flex;
flex-flow: row wrap;
overflow-y: scroll;
}<div class='container'>
<div class='sidebar'>
<ul>
<li>Onnnne</li>
<li>Twoo</li>
<li>Threee</li>
</ul>
</div>
<div class='content'>
<div class='content-header'>
<span>This iscontent header</span>
</div>
<div class='content-main'>
<div class='main-list'>
<ul>
<li>List 1</li>
<li>List 2</li>
<li>List 3</li>
</ul>
</div>
<div class='main-body'>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
</div>How can I prevent the green child to have bigger height than its plum parent? I want the child to just be scrollable but never taller than its parents.
361
Getting the child of a flex-item to fill height 100% Set position: absolute; on the child. You can then set width/height as required (100% in my sample).
To override this behavior, use min-width: 0 or overflow: hidden .
It can be changed by using the flex-direction property. To use flexbox, we have to set display: flex or inline-flex to flex-container. By default, the height and width of a flex-container are set to auto. But we can define a fixed amount to them.
As long as the flex container has no height itself, you can set height: 0% on the first flex item. Because it has no height to inherit from its parent, any percentage height will cause it to collapse.
Example 1: This example makes a child flex-box of height 100% using CSS. Example 2: The second way to achieve this by using align-items property in the parent div to ‘strech’. It makes every .child-div 100% height of it’s parent height. Example 3: This example makes width of child to 100% of there parent.
Let’s say you have a flexbox container with a button inside: If you try to center align the button (child element) horizontally with the justify-content property like this: Then the button’s (child element) height will stretch to whatever the height of the parent element is (in this case 300px ):
A parent container with height: auto and flex-direction: column was not expanding properly in height when a child element had flex: 1 applied and enough contents to fully expand in height. Solution was to apply flex-basis: auto; to the child elements which.
An important rule of Flexbox is that the parent doesn’t apply to its grand-children so the next step is to target each of the children and make them flex as well. Using your browser’s Developer Tool, inspect the page elements to identify the column class names by right-clicking on the module.
Flexbox introduces auto as the new initial value of min-height. It makes flex items grow as tall as their contents.
You can undo that by setting min-height to 0, the old initial value:
.content-main {
min-height: 0;
}
html,
body {
width: 100%;
height: 100%;
background: lightblue;
box-sizing: border-box;
}
* {
box-sizing: border-box;
}
.container {
height: inherit;
background: PeachPuff;
padding: 1em;
display: flex;
max-height: 500px;
}
.sidebar {
flex: 0 1 15%;
background: khaki;
}
.content {
flex: 1 1 auto;
background: plum;
padding: 0.8em;
display: flex;
flex-direction: column;
}
.content-header {
background: lightgreen;
padding: 0.3em;
flex: 0 0 7%;
}
.content-main {
display: flex;
background: darkseagreen;
padding: 1em;
height: 100%;
flex: 1 1 auto;
min-height: 0;
}
.main-list {
flex: 0 0 12%;
background: lightcoral;
}
.main-body {
flex: 0 1 auto;
padding: 1em;
background: lightcyan;
display: flex;
flex-flow: row wrap;
overflow-y: scroll;
}<div class='container'>
<div class='sidebar'>
<ul>
<li>Onnnne</li>
<li>Twoo</li>
<li>Threee</li>
</ul>
</div>
<div class='content'>
<div class='content-header'>
<span>This iscontent header</span>
</div>
<div class='content-main'>
<div class='main-list'>
<ul>
<li>List 1</li>
<li>List 2</li>
<li>List 3</li>
</ul>
</div>
<div class='main-body'>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
</table>
</div>
<div class='panel'>
<table>
<thead>
<th>First</th>
<th>Second</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
<th>Third</th>
</thead>
<tbody>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</tbody>
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