图像/文本不透明度渐变为透明

Question

我在这里发现了几乎所有我想要的东西，但并不完全。我已经看到渐变添加到颜色的图像，但我希望将图像淡出0％不透明度。 另外，在这个可能的文字也呢？要获得这样的效果吗？

Answer 1

这可能有助于您FIDDLE 我刚刚添加了一个层，从顶部到底部有一些不透明度。

HTML 的

<div id="layer"></div>
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum         has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).


Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.

The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham. 

CSS

#layer{
    background-image: -webkit-gradient(
                           linear, left top, left bottom, 
                           from(rgba(255,255,255,0.1)),
                           to(rgba(255,255,255,0.8)),
                           color-stop(.9,#fff)
                       );
    position         : fixed;
    width            : 100%;
    height           : 100%;
}

Answer 2

您可以在伪元素上使用插入框阴影。

伪元素位于文本上方，以便它的插入框阴影覆盖文本并将其淡化为0％。如果div中有交互式内容（如链接），则需要在伪元素上添加pointer-events:none;。

<强> DEMO

HTML：

<div> ... CONTENT ...</div>

CSS：

div{
    position:relative;
}
div:after{
    content:'';
    position:absolute;
    width:100%;
    height:100%;
    top:0;
    left:0;
    -webkit-box-shadow: inset 0px -300px 200px -100px #fff;
    box-shadow: inset 0px -300px 200px -100px #fff;
    pointer-events:none;
}