3.4 KiB
3.4 KiB
id | title | challengeType | videoUrl |
---|---|---|---|
587d78a7367417b2b2512ae1 | Create Movement Using CSS Animation | 0 | https://scrimba.com/c/c7amZfW |
Description
position
, such as fixed
or relative
, the CSS offset properties right
, left
, top
, and bottom
can be used in animation rules to create movement.
As shown in the example below, you can push the item downwards then upwards by setting the top
property of the 50%
keyframe to 50px, but having it set to 0px for the first (0%
) and the last (100%
) keyframe.
@keyframes rainbow {
0% {
background-color: blue;
top: 0px;
}
50% {
background-color: green;
top: 50px;
}
100% {
background-color: yellow;
top: 0px;
}
}
Instructions
div
animation. Using the left
offset property, add to the @keyframes
rule so rainbow starts at 0 pixels at 0%
, moves to 25 pixels at 50%
, and ends at -25 pixels at 100%
. Don't replace the top
property in the editor - the animation should have both vertical and horizontal motion.
Tests
tests:
- text: The <code>@keyframes</code> rule for <code>0%</code> should use the <code>left</code> offset of 0px.
testString: assert(code.match(/0%\s*?{\s*?background-color:\s*?blue;\s*?top:\s*?0(px)?;\s*?left:\s*?0(px)?;\s*?}/gi), 'The <code>@keyframes</code> rule for <code>0%</code> should use the <code>left</code> offset of 0px.');
- text: The <code>@keyframes</code> rule for <code>50%</code> should use the <code>left</code> offset of 25px.
testString: assert(code.match(/50%\s*?{\s*?background-color:\s*?green;\s*?top:\s*?50px;\s*?left:\s*?25px;\s*?}/gi), 'The <code>@keyframes</code> rule for <code>50%</code> should use the <code>left</code> offset of 25px.');
- text: The <code>@keyframes</code> rule for <code>100%</code> should use the <code>left</code> offset of -25px.
testString: assert(code.match(/100%\s*?{\s*?background-color:\s*?yellow;\s*?top:\s*?0(px)?;\s*?left:\s*?-25px;\s*?}/gi), 'The <code>@keyframes</code> rule for <code>100%</code> should use the <code>left</code> offset of -25px.');
Challenge Seed
<style>
div {
height: 40px;
width: 70%;
background: black;
margin: 50px auto;
border-radius: 5px;
position: relative;
}
#rect {
animation-name: rainbow;
animation-duration: 4s;
}
@keyframes rainbow {
0% {
background-color: blue;
top: 0px;
}
50% {
background-color: green;
top: 50px;
}
100% {
background-color: yellow;
top: 0px;
}
}
</style>
<div id="rect"></div>
Solution
var code = "@keyframes rainbow {0% {background-color: blue; top: 0px; left: 0px;} 50% {background-color: green; top: 50px; left: 25px;} 100% {background-color: yellow; top: 0px; left:-25px;}}"