Evenly distributes child elements within a parent element.
display: flexenables flexbox.justify-content: space-betweenevenly distributes child elements horizontally. The first item is positioned at the left edge, while the last item is positioned at the right edge.- Alternatively, use 
justify-content: space-aroundto distribute the children with space around them, rather than between them. 
预览
Item1
Item2
Item3
HTML
<div class="evenly-distributed-children">
  <p>Item1</p>
  <p>Item2</p>
  <p>Item3</p>
</div>
CSS
.evenly-distributed-children {
  display: flex;
  justify-content: space-between;
}
翻译自:https://www.30secondsofcode.org/css/s/evenly-distributed-children