To exceed the ImportXML limit on Google Spreadsheet

I created a custom import function that overcomes all limits of IMPORTXML I have a sheet using this in about 800 cells and it works great.

It makes use of Google Sheet’s custom scripts (Tools > Script editor…) and searches through content using regex instead of xpath.

function importRegex(url, regexInput) {
  var output="";
  var fetchedUrl = UrlFetchApp.fetch(url, {muteHttpExceptions: true});
  if (fetchedUrl) {
    var html = fetchedUrl.getContentText();
    if (html.length && regexInput.length) {
      output = html.match(new RegExp(regexInput, 'i'))[1];
    }
  }
  // Grace period to not overload
  Utilities.sleep(1000);
  return output;
}

You can then use this function like any function.

=importRegex("https://example.com", "<title>(.*)<\/title>")

Of course, you can also reference cells.

=importRegex(A2, "<title>(.*)<\/title>")

If you don’t want to see HTML entities in the output, you can use this function.

var htmlEntities = {
  nbsp:  ' ',
  cent:  '¢',
  pound: '£',
  yen:   '¥',
  euro:  '€',
  copy:  '©',
  reg:   '®',
  lt:    '<',
  gt:    '>',
  mdash: '–',
  ndash: '-',
  quot:  '"',
  amp:   '&',
  apos:  '\''
};

function unescapeHTML(str) {
    return str.replace(/\&([^;]+);/g, function (entity, entityCode) {
        var match;

        if (entityCode in htmlEntities) {
            return htmlEntities[entityCode];
        } else if (match = entityCode.match(/^#x([\da-fA-F]+)$/)) {
            return String.fromCharCode(parseInt(match[1], 16));
        } else if (match = entityCode.match(/^#(\d+)$/)) {
            return String.fromCharCode(~~match[1]);
        } else {
            return entity;
        }
    });
};

All together…

function importRegex(url, regexInput) {
  var output="";
  var fetchedUrl = UrlFetchApp.fetch(url, {muteHttpExceptions: true});
  if (fetchedUrl) {
    var html = fetchedUrl.getContentText();
    if (html.length && regexInput.length) {
      output = html.match(new RegExp(regexInput, 'i'))[1];
    }
  }
  // Grace period to not overload
  Utilities.sleep(1000);
  return unescapeHTML(output);
}

var htmlEntities = {
  nbsp:  ' ',
  cent:  '¢',
  pound: '£',
  yen:   '¥',
  euro:  '€',
  copy:  '©',
  reg:   '®',
  lt:    '<',
  gt:    '>',
  mdash: '–',
  ndash: '-',
  quot:  '"',
  amp:   '&',
  apos:  '\''
};

function unescapeHTML(str) {
    return str.replace(/\&([^;]+);/g, function (entity, entityCode) {
        var match;

        if (entityCode in htmlEntities) {
            return htmlEntities[entityCode];
        } else if (match = entityCode.match(/^#x([\da-fA-F]+)$/)) {
            return String.fromCharCode(parseInt(match[1], 16));
        } else if (match = entityCode.match(/^#(\d+)$/)) {
            return String.fromCharCode(~~match[1]);
        } else {
            return entity;
        }
    });
};