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---
layout: default
permalink: docs/keyframes.html
---
# @keyframes
Stylus supports `@keyframes` both with curly braces or without them, you can also use interpolation both in names or steps of @keyframes:
$keyframe-name = pulse
@keyframes {$keyframe-name}
for i in 0..10
{10% * i}
opacity (i/10)
Yielding (expanded prefixes ommited):
@keyframes pulse {
0% {
opacity: 0;
}
20% {
opacity: 0.2;
}
40% {
opacity: 0.4;
}
60% {
opacity: 0.6;
}
80% {
opacity: 0.8;
}
100% {
opacity: 1;
}
}
## Expansion
By using `@keyframes`, your rules are automatically expanded to the vendor prefixes defined by the `vendors` variable (default: `moz webkit o ms official`). This means we can alter it at any time for the expansion to take effect immediately.
**Note that expansion of `@keyframes` to the prefixed at-rules would be removed from the Stylus 1.0 when we'd get to it**
For example, consider the following:
@keyframes foo {
from {
color: black
}
to {
color: white
}
}
This expands to our three default vendors, and the official syntax:
@-moz-keyframes foo {
from {
color: #000;
}
to {
color: #fff;
}
}
@-webkit-keyframes foo {
from {
color: #000;
}
to {
color: #fff;
}
}
@-o-keyframes foo {
from {
color: #000;
}
to {
color: #fff;
}
}
@keyframes foo {
from {
color: #000;
}
to {
color: #fff;
}
}
If we wanted to limit to the official syntax only, simply alter `vendors`:
vendors = official
@keyframes foo {
from {
color: black
}
to {
color: white
}
}
Yielding:
@keyframes foo {
from {
color: #000;
}
to {
color: #fff;
}
}
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