at-rule.js•702 B
let Prefixer = require('./prefixer')
class AtRule extends Prefixer {
/**
* Clone and add prefixes for at-rule
*/
add(rule, prefix) {
let prefixed = prefix + rule.name
let already = rule.parent.some(
i => i.name === prefixed && i.params === rule.params
)
if (already) {
return undefined
}
let cloned = this.clone(rule, { name: prefixed })
return rule.parent.insertBefore(rule, cloned)
}
/**
* Clone node with prefixes
*/
process(node) {
let parent = this.parentPrefix(node)
for (let prefix of this.prefixes) {
if (!parent || parent === prefix) {
this.add(node, prefix)
}
}
}
}
module.exports = AtRule