Making the text gradually disappear at the bottom of a section using a see-through overlay, while ensuring the height remains within the boundaries of the section even

Trying to achieve a sleek fade-out effect at the end of a text section for a 'read more' indicator.

I've been studying various tutorials, including this, and my current code is as follows:

html

<section>
    <p>Lorem ipsum dolor sit amet...elit.</p>                                                                  
    <p>Ut enim ad minim veniam...aliquip.</p>
    <div class="fadeout"></div>
</section>
<p>Additional content here</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 issue I'm facing is that even with the transparent div overlapping the text body, there's still a gap of 4em between it and 'Other Stuff.'

Any suggestions?

csshtmlfadefadeoutfadein

Answer №1

Latest Update for 2020:

A new method has been discovered to achieve this effect using true alpha transparency, eliminating the need for an additional <div> covering the bottom. By simply utilizing the CSS mask-image property with a linear gradient that transitions from black to transparent, the browser can handle the rest automatically. Check out the demo below:

.container {
  -webkit-mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
  height:  150px;
  width: 300px;
  overflow-y: scroll;
}
body {
  background: #09f;
  transition: background 0.5s ease-out;
}
body:hover {
  background: #f90;
}
<div class="container">
  <p>Hover over or scroll down in this demo to witness the true alpha transparency! <br/>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam sed nisl id lectus viverra faucibus. Cras sed est sit amet turpis placerat consequat. Vestibulum viverra accumsan nisl a dapibus. Quisque mollis porta dictum. Praesent dictum non nisl at rutrum. Nam sem orci, efficitur quis faucibus non, aliquam eget est. In nec finibus ex, quis tristique augue. Duis tristique turpis a nunc sodales tincidunt.</p>
  <p>Morbi vehicula nisi ut lacus ornare, ac tincidunt sapien pellentesque. Aliquam gravida id dolor eget volutpat. In hac habitasse platea dictumst. Aenean ac enim eros. Vivamus augue nunc, interdum vitae pellentesque nec, interdum non turpis. Quisque viverra eget nibh in varius. Vivamus vel euismod velit. Vivamus suscipit lorem et porttitor gravida. Donec non nulla nulla. Duis eget dui sed urna eleifend sagittis.</p>
</div>

An added advantage of this technique is that it provides genuine transparency rather than simulating it by overlaying text with a background-matching color. This enables scrolling and background images to be visible! The change in background color upon hover illustrates the true transparent nature of the effect.

Most browsers support this feature, although Internet Explorer may have some limitations.

Answer №2

When using relatively positioned elements, they are not removed from the normal flow of HTML, so their initial space remains reserved even if they are moved. In contrast, absolute positioning does not maintain this reserved space.

.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

Answer №3

Joining the party a bit late, but there's another way to achieve this effect without using the .fadeout div. You can utilize a ::before or ::after pseudo-element like so:

        article {
            position: relative;
        }

        article::before {
            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%
            );
        }

Answer №4

To create a fade-out effect on an element, simply apply the .fade-out class:

.fade-out {
  position: relative;
  max-height: 350px; // adjust the height as needed
}
.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% );
}

Answer №5

To achieve the same effect, I suggest changing bottom: 4em to margin-top: -4em. This adjustment worked perfectly in my case.

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