flexbox 可以检测 flex 项目何时换行吗? [英] Can flexbox detect when a flex item wraps?
问题描述
我希望摆脱媒体查询,只使用 flexbox 来解决我的问题,但我不确定这是否可行.随着窗口变小,我希望列缩小,直到达到最小宽度.一旦他们击中那个,中间的柱子就会跳下来包裹.
我认为我的问题归结为这个 - flexbox 可以检测到它何时包装?如果是这样,我可以提示它使用严格的 CSS 更改包装项目的顺序吗?
这是我尝试使用媒体查询完成的codepen.>
.wrapper {显示:弹性;对齐内容:居中;边距:5px;flex-wrap: 包裹;}.红色的 {背景颜色:红色;高度:240px;边距:5px;宽度:500px;订单:0;}.黄色的 {背景颜色:黄色;边距:5px;高度:240px;最小宽度:240px;最大宽度:400px;弹性:1;订单:1;}.蓝色 {背景颜色:蓝色;高度:240px;边距:5px;最小宽度:350px;最大宽度:400px;弹性:1;订单:2;}@media(最大宽度:1130px){.黄色的 {订单:4;}}
<div class="red"></div><div class="yellow"></div><div class="blue"></div>
flexbox 可以检测 flex item 何时换行吗?
没有
在 CSS 中,一旦浏览器在初始级联上呈现页面,它就不会在元素换行时重排文档.因此,父元素不知道其子元素何时换行.
这就是容器在包装后不会收缩以适应其内容物的原因.
这就是您需要媒体查询或 JavaScript 的原因.
以下是更多详细信息:
I am hoping to get rid of media queries and just use flexbox to solve my problem, but I'm not sure if this is possible. As the window gets smaller, I want the columns to shrink until they hit their minimum width. Once they hit that, the middle column will jump down for the wrap.
I think my question boils down to this- can flexbox detect when it wraps? If so, can I prompt it to change the order of the items on wrap with strictly CSS?
Here is a codepen of what I"m trying to accomplish using media queries.
.wrapper {
display: flex;
justify-content: center;
margin: 5px;
flex-wrap: wrap;
}
.red {
background-color: red;
height: 240px;
margin: 5px;
width: 500px;
order: 0;
}
.yellow {
background-color: yellow;
margin: 5px;
height: 240px;
min-width: 240px;
max-width: 400px;
flex: 1;
order: 1;
}
.blue {
background-color: blue;
height: 240px;
margin: 5px;
min-width: 350px;
max-width: 400px;
flex: 1;
order: 2;
}
@media (max-width:1130px) {
.yellow {
order: 4;
}
}
<div class="wrapper">
<div class="red"></div>
<div class="yellow"></div>
<div class="blue"></div>
</div>
Can flexbox detect when a flex item wraps?
No.
In CSS, once the browser renders the page on the initial cascade, it doesn't reflow the document when an element wraps. As a result, parent elements don't know when their children wrap.
That's why containers don't shrink-to-fit their content after wrapping.
That's why you need media queries or JavaScript.
Here are some more details:
- Make container shrink-to-fit child elements as they wrap
- How to center a flex container but left-align flex items
这篇关于flexbox 可以检测 flex 项目何时换行吗?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!