CSS animations tutorial: Difference between revisions

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== Examples ==
== Examples ==


=== Simple color animation: ===
=== Simple color animation ===


Source:  
Source: The CSS suite from the CSS consortium. The code below and in CodePen has been slightly altered.


http://test.csswg.org/suites/css-animations-1_dev/nightly-unstable/html/animation-keyframes-001.htm
http://test.csswg.org/suites/css-animations-1_dev/nightly-unstable/html/animation-keyframes-001.htm
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Codepen (for play and copy/paste): https://codepen.io/danielkschneider/pen/KoBWpV
Codepen (for play and copy/paste): https://codepen.io/danielkschneider/pen/KoBWpV


<source lang="HTML5">
<source lang="CSS">
<style>
   div.coloranim {
   div.coloranim {
     animation-name: sample;
     animation-name: sample;
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     to {      background-color: blue;    }
     to {      background-color: blue;    }
   }
   }
</style>
</source>
<source lang="HTML5">
   <p>
   <p>
   There is a filled blue square with 'Filler Text' when the page loads.
   There is a filled blue square with 'Filler Text' when the page loads.
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   Try to add another keyframe for another color. Make the animation slower, then faster.
   Try to add another keyframe for another color. Make the animation slower, then faster.
   </p>
   </p>
   <div id="coloranim">Filler Text</div>
   <div id="coloranim">I argue for a change<br>Now</div>
</source>
</source>
=== Simple moving animation ===


== Links ==
== Links ==

Revision as of 19:07, 3 April 2018

Draft

Learning goals
  • Be able to create simple CSS transforms
Prerequisites
Level and target population
  • Beginners
Teaching materials
  • Example text: ....
Remarks
  • This tutorial is intended for students in educational technology or any other field that is technology intensive. For people who need less, there exist many easy CSS tutorials on the web. This text is intended for students who also must learn principles and who are willing to learn CSS by doing a project, looking at CSS code and online reference manuals.
  • Ideally, a teacher also should assign a text formatting task, during or before assigning this tutorial for reading).

Introduction

The CSS animations specification “describes a way for authors to animate the values of CSS properties over time, using keyframes. The behavior of these keyframe animations can be controlled by specifying their duration, number of repeats, and repeating behavior.” (CSS Animations Level 1, W3C Working Draft, 30 November 2017).

div {
    -webkit-animation: mykeyframes 5s; /* Chrome, Safari, Opera */
    animation: mykeyframes 5s;
}

/* Chrome, Safari, Opera */
@-webkit-keyframes mykeyframes {
    from {background: red;}
    to {background: yellow;}
}

/* Standard syntax */
@keyframes mykeyframes {
    from {background: blue;}
    to {background: red;}
}

Examples

Simple color animation

Source: The CSS suite from the CSS consortium. The code below and in CodePen has been slightly altered.

http://test.csswg.org/suites/css-animations-1_dev/nightly-unstable/html/animation-keyframes-001.htm

Codepen (for play and copy/paste): https://codepen.io/danielkschneider/pen/KoBWpV

  div.coloranim {
    animation-name: sample;
    animation-duration: 10s;
    background-color: blue;
    height: 100px;
    width: 100px;
  }

  @keyframes sample {
    from {     background-color: blue;    }
    30% {      background-color: green;    }
    65% {      background-color: yellow;    }
    to {       background-color: blue;    }
  }
  <p>
   There is a filled blue square with 'Filler Text' when the page loads.
   Color of the square gradully changes in order: BLUE to GREEN to YELLOW and back to BLUE in 10 seconds.

  Try to add another keyframe for another color. Make the animation slower, then faster.
  </p>
  <div id="coloranim">I argue for a change<br>Now</div>

Simple moving animation

Links

Official
Other