An initial setting of a flex container is flex-wrap: nowrap
. This means flex items are forced to remain in a single line.
You can override the default with flex-wrap: wrap
.
The display
value of flex items is ignored in flex layout.
A flex container, which is an element with display: flex
or display: inline-flex
, establishes a flex formatting context. Although similar to a block formatting context, there are differences.
One difference is that children of a flex container ignore the display
property.
Another difference is that, in a flex container, margins don't collapse, and the float
and clear
properties have no effect.
A flex container also comes with several default settings. Among them:
justify-content: flex-start
- flex items will stack at the start of the line
flex-shrink: 1
- flex items are allowed to shrink and will not overflow the container
align-items: stretch
- flex items will expand to cover the cross-size of the container
flex-direction: row
- flex items will align horizontally
flex-wrap: nowrap
- flex items are forced to stay in a single line
Note the last two items.
Flex items will line up in a row and cannot wrap.
If you want to have two flex items on the first line, and a third item on the second line, allow the container to be multi-line with flex-wrap: wrap
.
.container {
display: flex;
flex-wrap: wrap;
}
.box {
flex: 0 0 45%;
height: 50px;
margin: 5px;
background-color: lightgreen;
border: 1px solid #ccc;
}
<div class="container">
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
</div>
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…