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const escapeRE = /["'&<>]/
export function escapeHtml(string: unknown) {  const str = '' + string  const match = escapeRE.exec(str)
  if (!match) {    return str  }
  let html = ''  let escaped: string  let index: number  let lastIndex = 0  for (index = match.index; index < str.length; index++) {    switch (str.charCodeAt(index)) {      case 34: // "        escaped = '&quot;'        break      case 38: // &        escaped = '&amp;'        break      case 39: // '        escaped = '&#39;'        break      case 60: // <        escaped = '&lt;'        break      case 62: // >        escaped = '&gt;'        break      default:        continue    }
    if (lastIndex !== index) {      html += str.slice(lastIndex, index)    }
    lastIndex = index + 1    html += escaped  }
  return lastIndex !== index ? html + str.slice(lastIndex, index) : html}
// https://www.w3.org/TR/html52/syntax.html#commentsconst commentStripRE = /^-?>|<!--|-->|--!>|<!-$/g
export function escapeHtmlComment(src: string): string {  return src.replace(commentStripRE, '')}