bootstrap 4动画列宽变化 [英] bootstrap 4 animate column width change

问题描述

我有两列是这样的:

<div class="container">
    <div class="row">
        <div class="col-9"></div>
        <div class="col-3"></div>
    </div>
</div>

我正在通过angular将类名切换为col-8 offset-2和col-0. col-0是width:0;margin:0;padding:0.

I am switching the classnames via angular to be col-8 offset-2 and col-0 . col-0 is width:0;margin:0;padding:0.

我想知道如何为宽度和列位置设置动画.

I am wondering how to animate both the width, and the positions of columns.

推荐答案

由于Bootstrap 4使用flexbox，除非在列上使用数字flex-grow或flex-shrink设置，否则CSS过渡动画将不起作用.

Since Bootstrap 4 uses flexbox, CSS transition animations don't work unless you use set a numeric flex-grow or flex-shrink on the columns.

.col-8 {
  flex-grow: 1;
  transition: all 400ms ease;
}

.col-0 {
  width: 0; 
  flex-shrink: 1;
  transition: all 400ms ease;
}

演示: http://www.codeply.com/go/4Un0Q8CvkQ

要在网格列更改媒体查询断点时为其动画(而不是通过jQuery切换类)，只需在网格列上使用CSS过渡即可.

To animate the grid columns as they change the media query breakpoints (instead of toggle classes via jQuery), you can simply use a CSS transition on the grid columns.

.row [class*='col-'] {
    transition: all 0.5s ease-in-out;
}

演示: https://www.codeply.com/go/IHUZcvNjPS

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