::after 伪元素出现在之前 [英] ::after pseudo element appearing before

问题描述

我正在尝试在渐变的顶部和底部创建一个微妙的波浪.但是， ::after 伪元素出现在主要内容之前而不是之后.目前它显示为 ::before、::after、主要内容，但我希望它显示为 ::before、主要内容、::after.

I'm trying to create a subtle wave on the top and bottom of a gradient. However, the ::after pseudo element is appearing before the main content and not after. Currently it's showing as ::before, ::after, main content, but I want it to show as ::before, main content, ::after.

这是我的代码:

#gradient {
  background: #0068a9;/* For browsers that do not support gradients */
  background: -webkit-linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Safari 5.1-6*/
  background: -o-linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Opera 11.1-12*/
  background: -moz-linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Fx 3.6-15*/
  background: linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Standard*/
  width: 100%;
  height: 300px;
  min-height: 0px;
  display: block;
}

#gradient::before,
#gradient::after {
  display: block;
  content: "";
  width: 100%;
  height: 75px;
}

#gradient::before {
  background: #f2f2f2 url("http://www.qumidesignco.com/clients/preparedcapital/pc_topcurve.png") center top;
}

#gradient::after {
  background: #f2f2f2 url("http://www.qumidesignco.com/clients/preparedcapital/pc_bottomcurve.png") center top;
}

<div style="background:#f2f2f2; width: 100%; height: 300px; min-height: 0px; display:block;"></div>
<div id="gradient"></div>
<div style="background:#f2f2f2; width: 100%; height: 300px; min-height: 0px; display:block;"></div>

推荐答案

Make your gradient div relative , :before and :after <:before 中的 code>absolute 和 top:0 和 :after 中的 bottom:0

Make your gradient div relative , :before and :after absolute and top:0 in :before and bottom:0 in :after

#gradient {
  background: #0068a9;/* For browsers that do not support gradients */
  background: -webkit-linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Safari 5.1-6*/
  background: -o-linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Opera 11.1-12*/
  background: -moz-linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Fx 3.6-15*/
  background: linear-gradient(rgba(0, 104, 169, 1), rgba(0, 104, 169, .9));/*Standard*/
  width: 100%;
  height: 300px;
  min-height: 0px;
  display: block;
  position: relative;
}

#gradient::before,
#gradient::after {
  display: block;
  content: "";
  width: 100%;
  height: 75px;
  position: absolute;
}

#gradient::before {
  background: #f2f2f2 url("http://www.qumidesignco.com/clients/preparedcapital/pc_topcurve.png") center top;
  top:0;
}

#gradient::after {
  background: #f2f2f2 url("http://www.qumidesignco.com/clients/preparedcapital/pc_bottomcurve.png") center top;
  bottom: 0;
}

<div style="background:#f2f2f2; width: 100%; height: 300px; min-height: 0px; display:block;"></div>
<div id="gradient"></div>
<div style="background:#f2f2f2; width: 100%; height: 300px; min-height: 0px; display:block;"></div>

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