src/language-html/constants.evaluate.js/getCssStyleTags
const getCssStyleTags = (property) =>
  fromPairs(
    flat(
      htmlStyles
        .filter((htmlStyle) => htmlStyle.style[property])
        .map((htmlStyle) =>
          htmlStyle.selectorText
            .split(",")
            .map((selector) => selector.trim())
            .filter((selector) => /^[\dA-Za-z]+$/.test(selector))
            .map((tagName) => [tagName, htmlStyle.style[property]])
        )
    )
  );