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<style>
div {
width: 50px;
height: 50px;
background-color: yellow;
}
div.green {
width: 100px;
background-color: green;
-webkit-transition-property: background-color;
-webkit-transition-duration: 5s;
}
div.square {
width: 100px;
height: 100px;
-webkit-transition-property: height;
-webkit-transition-duration: 2s;
}
</style>
<p id="instructions">
When you click the Change button, the shape will
<span id="description"></span>.
<button style="display: block;" onclick="transition()">Change</button>
</p>
<div id="target"></div>
<script>
var state = 0;
var transitions = [
{className:"green", description:"instantly change into a rectangle and fade from yellow to green over 5 seconds"},
{className:"", description:"instantly change into a small yellow square"},
{className:"square", description:"instantly change into a yellow rectangle and then animate into a big yellow square over 2 seconds"},
{className:"green", description:"instantly change into a yellow rectangle and then animate to a green rectangle over 5 seconds"},
{className:"", description:"instantly change into a small yellow square"},
{className:"green", description:"instantly change into a yellow rectangle and fade from yellow to green over 5 seconds"},
{className:"square", description:"instantly change to a yellow rectangle and then animate into a large yellow square over 2 seconds"},
{className:"", description:"instantly change into a small yellow square"}
];
document.getElementById("description").innerText = transitions[0].description;
function transition()
{
var target = document.getElementById("target");
target.className = transitions[state].className;
state++;
if (state < transitions.length)
document.getElementById("description").innerText = transitions[state].description;
else {
document.getElementById("instructions").innerText = "Done.";
}
}
</script>
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