Sharing Chrome bookmarks but not all of them with #GoogleAppsScript

It is possible to export Chrome bookmarks  to a html file with the name bookmarks_dd-mm-yyyy.html:

• select the three vertical points at the top right 
• select bookmarks
• select bookmark manager
• select the three vertical points at the top right
• select export bookmarks

The Chrome bookmarks can be imported somewhere else via the html file.

I do want to share bookmarks but not all of them. Only bookmarks stored in some specific  bookmark folders. That is possible [what not ;-)] with Google Apps Script.

Bookmark folder names need to be unique. 

It took some time before I understood that 'new lines' [\n] had to be added.

function bookmarx2Share(){

var bookmarkFolders = [["parentFolder_1","childFolder_11","childFolder_12","childFolder_13"],["parentFolder_2","childFolder_21","childFolder_22","childFolder_23"]];

var html = "";
html += '<!DOCTYPE NETSCAPE-Bookmark-file-1>\n';
html += '<!-- This is an automatically generated file.\n';
html += 'It will be read and overwritten.\n';
html += 'DO NOT EDIT! -->\n';
html += '<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">\n';
html += '<TITLE>Bookmarks</TITLE>\n';
html += '<H1>Bookmarks</H1>\n';

  html += '<DL><p>\n';
  

  for (var b=0;b< bookmarkFolders.length;b++){

    var bookmarkFolder = bookmarkFolders[b]; 

    html += '<DT><H3 ADD_DATE="" LAST_MODIFIED=">' + bookmarkFolder[0] + '</H3>\n';
    html += '<DL><p>\n'

    for (var c=1;c< bookmarkFolder.length;c++){

      var bookmarkSubFolder = bookmarkFolder[c]; 

      if(bookmarkSubFolder !== ""){

        var bookmarxPerSubFolder = bookmarxPerFolder_(bookmarkSubFolder); 

        html += '<DT><H3 ADD_DATE="" LAST_MODIFIED=">' + bookmarkSubFolder + '</H3>\n';
        html += '<DL><p>\n';

          for(var d=0;d<bookmarxPerSubFolder.length;d++){

            var bookmark = bookmarxPerSubFolder[d];

            html += '<DT><A HREF="' + bookmark[1] +  '" ADD_DATE="" ICON="">' +  bookmark[0] +  '</A>\n';

          }
        html += '</DL><p>\n';
        
      }
    }
  html += '</DL><p>\n';
  }
  
  html += '</DL><p>\n';
  
var bookmarxFile = DriveApp.createFile('Bookmarx',html,"text/html");

var emails = ContactsApp.getContactGroup("BOOKMARK_CONTACTS").getContacts().map(function(contact){return contact.getEmails()[0].getAddress()});

GmailApp.sendEmail(emails,"Bookmarx shared with you","",{attachments: [bookmarxFile.getAs(MimeType.HTML)]})

}



function bookmarxPerFolder_(folder) {

  var html = "bookmarks_dd-mm-yyyy.html"; 
  
  var folderPlus = ">" + folder + "<"; 
   
  var bookmarxArray =[];
  var files = DriveApp.getFilesByName(html);

  while(files.hasNext()){

    var file = files.next();
  
    var bookmarx = file.getBlob().getDataAsString().split(folderPlus)[1].split("</DL><p>")[0].split(/<DT><A HREF="/);
        
    for(var b=1;b<bookmarx.length;b++){

     var bookmark = bookmarx[b];

     var textBookmark = bookmark.split(/<\/A>/)[0].split(/">/)[1].trim();
     var urlBookmark = bookmark.split(/"/)[0].trim();
                    
     bookmarxArray.push([textBookmark,urlBookmark])
    }
  } 
  
  return bookmarxArray.sort()
}