Question

我想要将以下背景属性应用于元素：

background: url('../img/bg.png') !important;

background: -moz-linear-gradient(left,  rgba(0,0,0,1) 0%, rgba(0,0,0,0) 50%, rgba(0,0,0,1) 100%) !important;
background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(0,0,0,1)), color-stop(50%,rgba(0,0,0,0)), color-stop(100%,rgba(0,0,0,1))) !important;
background: -webkit-linear-gradient(left,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;
background: -o-linear-gradient(left,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;
background: -ms-linear-gradient(left,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;
background: linear-gradient(to right,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;

我希望首先显示图像，然后显示渐变。是否有可能做到这一点？

Answer 1

因为background用于background: -moz-linear-gradient(left, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 50%, rgba(0,0,0,1) 100%), url('../img/bg.png') !important; background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(0,0,0,1)), color-stop(50%,rgba(0,0,0,0)), color-stop(100%,rgba(0,0,0,1))), url('../img/bg.png') !important; background: -webkit-linear-gradient(left, rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%), url('../img/bg.png') !important; background: -o-linear-gradient(left, rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%), url('../img/bg.png') !important; background: linear-gradient(to right, rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%), url('../img/bg.png') !important;（或几乎任何带有图像的CSS属性），您只需使用逗号列出渐变后的图像即可。需要注意的是，因为你有这么多的前缀，你需要重复每个前缀的图像URL：

!important

我离开了-ms-linear-gradient()令牌，但是如果他们不是出于任何特定目的，你应该删除它们。我确实删除了{{1}}行，因为它绝对不需要。

Answer 2

它可能需要两个元素，但你可以使用一个伪元素来使事情变得更清晰。 FIDDLE

#yourelement {
    position: relative;

    background: -moz-linear-gradient(left,  rgba(0,0,0,1) 0%, rgba(0,0,0,0) 50%, rgba(0,0,0,1) 100%) !important;
    background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(0,0,0,1)), color-stop(50%,rgba(0,0,0,0)), color-stop(100%,rgba(0,0,0,1))) !important;
    background: -webkit-linear-gradient(left,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;
    background: -o-linear-gradient(left,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;
    background: -ms-linear-gradient(left,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;
    background: linear-gradient(to right,  rgba(0,0,0,1) 0%,rgba(0,0,0,0) 50%,rgba(0,0,0,1) 100%) !important;
}

#yourelement:after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: url('../img/bg.png') !important;
}

Answer 3

我只是尝试过，幸运的是这在我的safari浏览器中有效。

background: url('img.png'), -webkit-linear-gradient(left, rgba(0, 0, 0, 1) 0%,transparent 50%,rgba(0, 0, 0, 1) 100%);

所以在你的情况下你会使用

background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(0, 0, 0, 1)), color-stop(50%,transparent), color-stop(100%,rgba(0, 0, 0, 1))), url('../img/bg.png');

这是fiddle

我可以同时应用多个背景吗？

3 个答案: