Use switch to replace chars in a string. Use \ to escape characters.

Convert HTML Entries

function convertHTML(str) {
  var htmlStr = "";

  var search = function(char) {
    switch (char) {
      case '&':
        console.log("& found");
        str = str.replace("&", "&");
        break;
      case '<':
        console.log("< found");
        str = str.replace("<", "&lt;");
        break;
      case '>':
        console.log("> found");
        str = str.replace(">", "&gt;");
        break;
      case '\"':
        console.log("double quotes found");
        str = str.replace("\"", "&quot;");
        break; 
      case "'":
        console.log("quote found");
        str = str.replace("'", "&apos;");
        break; 
    }
  }

  for (var i = 0; i < str.length; i++) {
    search(str[i]);
  }
  
  return str;
}

convertHTML("Schindler's List");