158 lines
2.5 KiB
Markdown
158 lines
2.5 KiB
Markdown
# PostCSS Discard Overridden
|
|
|
|
[PostCSS] plugin to discard overridden `@keyframes` or `@counter-style`.
|
|
|
|
`@keyframes` or `@counter-style` will be overridden by those who share the same identifiers and appear later in stylesheets. So we can discard all of them except the last one. When defined inside a `@media` or `@supports` rule, `@keyframes` and `@counter-style` rules only override global rules in some of the client browsers so they need handled separately. This plugin has taken care of this and transforms the PostCss AST **safely**.
|
|
|
|
[PostCSS]: https://github.com/postcss/postcss
|
|
|
|
```css
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 0.8;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 0.8;
|
|
}
|
|
}
|
|
@media (max-width: 500px) {
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 0.8;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 0.8;
|
|
}
|
|
}
|
|
@supports (display: flex) {
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
```
|
|
|
|
```css
|
|
@media (max-width: 500px) {
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 0.8;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 0.8;
|
|
}
|
|
}
|
|
@supports (display: flex) {
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
@-webkit-keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
@keyframes fade-in {
|
|
0% {
|
|
opacity: 0;
|
|
}
|
|
100% {
|
|
opacity: 1;
|
|
}
|
|
}
|
|
```
|
|
|
|
## Usage
|
|
|
|
See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
|
|
examples for your environment.
|
|
|
|
## Contributors
|
|
|
|
See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
|