It's much easier to understand javascript with your contributions. I would like to ask if you can confirm does this code work, because I can't find answer anywhere. I tried it several times, but it does not work for me. Maybe I've made something wrong. Thank you!

const json = JSON.stringify(['reblog', {
  account: username,
  author: 'author',
  permlink: 'permlink'
}]);

steem.broadcast.customJson(privPostingWif, [], [username], 'follow', json, (err, result) => {
  console.log(err, result);
});