12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
/*! * escape-html * Copyright(c) 2012-2013 TJ Holowaychuk * Copyright(c) 2015 Andreas Lubbe * Copyright(c) 2015 Tiancheng "Timothy" Gu * Copyright (c) 2020 Henry Zhuang * MIT Licensed */
const matchHtmlRegExp = /["'&<>]/;
/** * Escape special characters in the given string of text. * * @param  {string} string The string to escape for inserting into HTML * @return {string} * @public */
export function escapeHtml(string: string): string {  const str = "" + string;  const match = matchHtmlRegExp.exec(str);
  if (!match) {    return str;  }
  let escape;  let html = "";  let index = 0;  let lastIndex = 0;
  for (index = match.index; index < str.length; index++) {    switch (str.charCodeAt(index)) {      case 34: // "        escape = "&quot;";        break;      case 38: // &        escape = "&amp;";        break;      case 39: // '        escape = "&#39;";        break;      case 60: // <        escape = "&lt;";        break;      case 62: // >        escape = "&gt;";        break;      default:        continue;    }
    if (lastIndex !== index) {      html += str.substring(lastIndex, index);    }
    lastIndex = index + 1;    html += escape;  }
  return lastIndex !== index ? html + str.substring(lastIndex, index) : html;}