:shipit: Dynamic max height plugin for jQuery with CSS animation
HTML JavaScript CSS

README.md

Dynamic max height plugin for jQuery

This is a jQuery plugin to dynamically check a layer height and compare it to a custom height value.

Preview

  • Configure max-height via data attribute
  • Button appears only in if item-height > max-height
  • Configure "show more / show less" messages via data attributes
  • Animate via CSS transitions (best performance)

Online demo

DEMO

How to use?

Javascript

Include the jquery.dynamicmaxheight.min.js before your </body> tag and initialise it:

 <script src="path/to/file/jquery.dynamicmaxheight.min"></script>
 <script>
    $('.dynamic-max-height').dynamicMaxHeight();
 </script>

HTML

The plugin depends on the following HTML structure:

<div class="js-dynamic-height" data-maxheight="70">
    <div class="dynamic-height-wrap">
      <p> My life fades. The vision dims. All that remains are memories. I remember a time of chaos... ruined dreams... this wasted land. But most of all, I remember The Road Warrior. The man we called "Max." To understand who he was, you have to go back to another time... when the world was powered by the black fuel... and the desert sprouted great cities of pipe and steel. Gone now... swept away. For reasons long forgotten, two mighty warrior tribes went to war, and touched off a blaze which engulfed them all. Without fuel they were nothing. They'd built a house of straw. The thundering machines sputtered and stopped. Their leaders talked and talked and talked. But nothing could stem the avalanche. Their world crumbled. </p>
    </div>
    <button class="js-dynamic-show-hide button" title="Show more" data-replace-text="Show less">Show more</button>
</div>

CSS

Minimal CSS Rules for the plugin:

.dynamic-height-wrap {
  overflow: hidden;
  position: relative;
  transition: max-height 0.25s ease-in-out;
  width: 100%;
}

/* Bottom gradient (optional, but recommended)*/
.dynamic-height-active .dynamic-height-wrap:before {
  background: linear-gradient(to bottom,  rgba(240,249,255,0) 0%,rgba(255,255,255,1) 100%);
  bottom: 0;
  content:'';
  height: 30px;
  left: 0;
  position: absolute;
  right: 0;
  z-index: 1;
}

.dynamic-height-active .dynamic-show-more {
  display: inline-block;
}

.dynamic-show-more {
  display: none;
}

Options

Value Description
data-maxheight Change "data-maxheight" in each item to set a different max height value
data-replace-text Change "data-maxheight" in each button to set a custom "show less" message

VanillaJS version

Looking for a VanillaJS verion? Check out pinceladasdaweb's DynamicMaxHeight in pure Javascript.

License

The MIT License (MIT)

Copyright (c) 2015 Joan Claret

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

Thanks

Many thanks to David Panyella and Òscar Casajuana for help and inspiration.

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