CasperSecurity
let comparisonMap = {
atrule: ['name', 'params'],
rule: ['selector'],
}
let types = new Set(Object.keys(comparisonMap))
export default function collapseAdjacentRules() {
return (root) => {
let currentRule = null
root.each((node) => {
if (!types.has(node.type)) {
currentRule = null
return
}
if (currentRule === null) {
currentRule = node
return
}
let properties = comparisonMap[node.type]
if (node.type === 'atrule' && node.name === 'font-face') {
currentRule = node
} else if (
properties.every(
(property) =>
(node[property] ?? '').replace(/\s+/g, ' ') ===
(currentRule[property] ?? '').replace(/\s+/g, ' ')
)
) {
currentRule.append(node.nodes)
node.remove()
} else {
currentRule = node
}
})
}
}