html - 如何在 CSS 中结合背景图片 + 线性渐变？背景图像上的线性渐变

Question

祝大家一切顺利。

所以我有一个带有背景图片的部分，我想在背景图片上添加线性渐变。

我想要的结果:

到目前为止，我有一个带有背景图片的 div。

当前的 CSS:

background-image: url("../pixels/lastCallToActionBg.jpg");
background-position: center;
background-repeat: no-repeat;
background-size: cover;

我要添加的线性渐变 CSS:

background: url(data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiA/Pgo8c3ZnIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgdmlld0JveD0iMCAwIDEgMSIgcHJlc2VydmVBc3BlY3RSYXRpbz0ibm9uZSI+CiAgPGxpbmVhckdyYWRpZW50IGlkPSJncmFkLXVjZ2ctZ2VuZXJhdGVkIiBncmFkaWVudFVuaXRzPSJ1c2VyU3BhY2VPblVzZSIgeDE9IjAlIiB5MT0iMCUiIHgyPSIwJSIgeTI9IjEwMCUiPgogICAgPHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iIzAwMDAwMCIgc3RvcC1vcGFjaXR5PSIxIi8+CiAgICA8c3RvcCBvZmZzZXQ9IjElIiBzdG9wLWNvbG9yPSIjMDAwMDAwIiBzdG9wLW9wYWNpdHk9IjEiLz4KICAgIDxzdG9wIG9mZnNldD0iMTUlIiBzdG9wLWNvbG9yPSIjMDAwMDAwIiBzdG9wLW9wYWNpdHk9IjAiLz4KICAgIDxzdG9wIG9mZnNldD0iMTAwJSIgc3RvcC1jb2xvcj0iIzAwMDAwMCIgc3RvcC1vcGFjaXR5PSIwIi8+CiAgPC9saW5lYXJHcmFkaWVudD4KICA8cmVjdCB4PSIwIiB5PSIwIiB3aWR0aD0iMSIgaGVpZ2h0PSIxIiBmaWxsPSJ1cmwoI2dyYWQtdWNnZy1nZW5lcmF0ZWQpIiAvPgo8L3N2Zz4=);
background: -moz-linear-gradient(
  top,
  rgba(0, 0, 0, 1) 0%,
  rgba(0, 0, 0, 1) 1%,
  rgba(0, 0, 0, 0) 15%,
  rgba(0, 0, 0, 0) 100%
); /* FF3.6-15 */
background: -webkit-gradient(
  linear,
  left top,
  left bottom,
  color-stop(0%, rgba(0, 0, 0, 1)),
  color-stop(1%, rgba(0, 0, 0, 1)),
  color-stop(15%, rgba(0, 0, 0, 0)),
  color-stop(100%, rgba(0, 0, 0, 0))
); /* Chrome4-9,Safari4-5 */
background: -webkit-linear-gradient(
  top,
  rgba(0, 0, 0, 1) 0%,
  rgba(0, 0, 0, 1) 1%,
  rgba(0, 0, 0, 0) 15%,
  rgba(0, 0, 0, 0) 100%
); /* Chrome10-25,Safari5.1-6 */
background: -o-linear-gradient(
  top,
  rgba(0, 0, 0, 1) 0%,
  rgba(0, 0, 0, 1) 1%,
  rgba(0, 0, 0, 0) 15%,
  rgba(0, 0, 0, 0) 100%
); /* Opera 11.10-11.50 */ /* IE10 preview */
background: -webkit-gradient(
  linear,
  left top,
  left bottom,
  from(rgba(0, 0, 0, 1)),
  color-stop(1%, rgba(0, 0, 0, 1)),
  color-stop(15%, rgba(0, 0, 0, 0)),
  to(rgba(0, 0, 0, 0))
);
background: -moz-linear-gradient(
  top,
  rgba(0, 0, 0, 1) 0%,
  rgba(0, 0, 0, 1) 1%,
  rgba(0, 0, 0, 0) 15%,
  rgba(0, 0, 0, 0) 100%
);
background: linear-gradient(
  to bottom,
  rgba(0, 0, 0, 1) 0%,
  rgba(0, 0, 0, 1) 1%,
  rgba(0, 0, 0, 0) 15%,
  rgba(0, 0, 0, 0) 100%
); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#000000', endColorstr='#00000000',GradientType=0 ); /* IE6-8 */

谢谢。

Answer 1

在section里面做一个div，作为 mask ，设置 mask 的渐变作为背景。

面具的 css 看起来像这样:

position: relative;
top: 0;
left: 0;
width: 100%;
height: 100%;

所以它会遍及父元素(section)

section {

    width: 100vw;
    height: 10rem;
    background: url(https://www.yannickdixon.com/wp-content/uploads/2016/12/161124-golden-seaside-sunset-photography-print.jpg);
}

.overlay {

position: relative;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url(data:image/svg+xml;base64,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);
    background: -moz-linear-gradient( top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 1%, rgba(0, 0, 0, 0) 15%, rgba(0, 0, 0, 0) 100% );
    background: -webkit-gradient( linear, left top, left bottom, color-stop(0%, rgba(0, 0, 0, 1)), color-stop(1%, rgba(0, 0, 0, 1)), color-stop(15%, rgba(0, 0, 0, 0)), color-stop(100%, rgba(0, 0, 0, 0)) );
    background: -webkit-linear-gradient( top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 1%, rgba(0, 0, 0, 0) 15%, rgba(0, 0, 0, 0) 100% );
    background: -o-linear-gradient( top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 1%, rgba(0, 0, 0, 0) 15%, rgba(0, 0, 0, 0) 100% );
    background: -webkit-gradient( linear, left top, left bottom, from(rgba(0, 0, 0, 1)), color-stop(1%, rgba(0, 0, 0, 1)), color-stop(15%, rgba(0, 0, 0, 0)), to(rgba(0, 0, 0, 0)) );
    background: -moz-linear-gradient( top, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 1%, rgba(0, 0, 0, 0) 15%, rgba(0, 0, 0, 0) 100% );
    background: linear-gradient( to bottom, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 1) 1%, rgba(0, 0, 0, 0) 15%, rgba(0, 0, 0, 0) 100% );
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#000000', endColorstr='#00000000',GradientType=0 );
}

<section>
<div class="overlay"></div>
</section>