PostCSS plugin adds content: '' to :before and :after pseudo-elements.
.foo:before-c {
display: block;
width: 10px;
height: 10px;
}
.bar .baz:after-c {
}.foo:before {
display: block;
width: 10px;
height: 10px;
content: '';
}
.bar .baz:after {
content: '';
}postcss([ require('postcss-pseudo-elements-content') ])See PostCSS docs for examples for your environment.