Fading out text at bottom of a section with transparent div, but height stays under section after overlaying div

I'm trying to get a nice fade-out effect at the bottom of a section of text as a 'read more' indicator.

I've been following a bit off this and other tutorials, and my code currently is as follows:

html

<section>
    <p>malesuada fames ac turpis egestas...leo.</p>                                                                  
    <p>malesuada fames ac turpis egestas...leo.</p>
    <div class="fadeout"></div>
</section>
<p>Stuff after</p>

css

.fadeout {
    position: relative; 
    bottom: 4em;
    height: 4em;
    background: -webkit-linear-gradient(
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 1) 100%
    ); 
}

jsFiddle

The problem is, even when I position the transparent div over the body of text, the 4em's of space still exists between and 'Other Stuff.'

Any ideas?

A relatively position element is not removed from the normal html flow, so if you move it around the initial space reserved for it still remains, however with absolute positioning this is not the case

.fadeout {
    position: absolute; 
    bottom: 0em;
    width:100%;
    height: 4em;
    background: -webkit-linear-gradient(
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 1) 100%
    ); 
    background-image: -moz-linear-gradient(
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 1) 100%
    );
    background-image: -o-linear-gradient(
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 1) 100%
    );
    background-image: linear-gradient(
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 1) 100%
    );
    background-image: -ms-linear-gradient(
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 1) 100%
    );
} 
section {position:relative}

DEMO

Came to this late to the party, but this can also be done without the .fadeout div, using a ::before or ::after pseudo-element:

        section {
            position: relative;
        }

        section::after {
            content: '';
            position: absolute;
            bottom: 0;
            width: 100%;
            height: 15px;
            background: -webkit-linear-gradient(
                    rgba(255, 255, 255, 0) 0%,
                    rgba(255, 255, 255, 1) 100%
            );
            background-image: -moz-linear-gradient(
                    rgba(255, 255, 255, 0) 0%,
                    rgba(255, 255, 255, 1) 100%
            );
            background-image: -o-linear-gradient(
                    rgba(255, 255, 255, 0) 0%,
                    rgba(255, 255, 255, 1) 100%
            );
            background-image: linear-gradient(
                    rgba(255, 255, 255, 0) 0%,
                    rgba(255, 255, 255, 1) 100%
            );
            background-image: -ms-linear-gradient(
                    rgba(255, 255, 255, 0) 0%,
                    rgba(255, 255, 255, 1) 100%
            );
        }

Simple add .fade-out onto the element you want to "fade-out":

.fade-out {
  position: relative;
  max-height: 350px; // change the height
}
.fade-out:after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-image: linear-gradient( rgba(255, 255, 255, 0) 50%, rgba(255, 255, 255, 1) 100% );
}

Mintytail

Just replace bottom: 4em with margin-top: -4em. Works perfect for me.

Desiree

Added overflow:hidden; to .fade-out {} above.

来源：https://stackoverflow.com/questions/11837606/fading-out-text-at-bottom-of-a-section-with-transparent-div-but-height-stays-un

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