const ids = selector.match(/#[\w-]+/g)?.length ?? 0;

const classes = selector.match(/\.[\w-]+/g)?.length ?? 0;

const withoutIdsOrClasses = selector.replace(/#[\w-]+|\.[\w-]+/g, " ");

const elements = withoutIdsOrClasses

.split(/[\s>+~]+/)

.filter((part) => /^[a-z][\w-]*$/i.test(part)).length;

let elements = 0;

for (const part of withoutIdsOrClasses.split(/[\s>+~]+/)) {

if (/^[a-z][\w-]*$/i.test(part)) {

elements++;

}

}

return [ids, classes, elements];

}