/** html 实体转义 https://www.sitemaps.org/protocol.html#escaping */
export function escaping(s: string) {
  return s
    .replace(/&/g, "&")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;")
    .replace(/'/g, "&apos");
}
export function unescaping(s: string) {
  return s
    .replace(/&amp;/g, "&")
    .replace(/&lt;/g, "<")
    .replace(/&gt;/g, ">")
    .replace(/&quot;/g, '"')
    .replace(/&apos;/g, "'")
    .replace(/&#(\d+);/g, (_sub,code) => {
      return String.fromCharCode(Number(code));
    });
}