Meta tag content generator

meta_script.js

function createMetaTags(tags, type) {
  var comment = document.createComment(type);
  document.getElementsByTagName('head')[0].appendChild(comment);
  tags.forEach(element => {
    var attribute = Object.keys(element)[0];
    var link = document.createElement('meta');
    link.setAttribute(attribute, element[attribute]);
    var metaKey = element[attribute].split(':');
    var content = metaKey.length > 1 ? metaValues[metaKey[1]] : metaValues[metaKey[0]]
    link.content = content;
    document.getElementsByTagName('head')[0].appendChild(link);
  });
};

var logoUrl = 'https://test/logo.svg';
var author = 'test';
var metaValues = {
  title: "test",
  description: "test",
  url: "https://www.test.com/",
  image: logoUrl,
  'image:src': logoUrl,
  type: "Website",
  creator: author,
  author: author,
  site: author
};

var ogMeta = [
  { property: 'og:title' },
  { property: 'og:type' },
  { property: 'og:url' },
  { property: 'og:image' },
  { property: 'og:description' }
];

var twitterMeta = [
  { name: 'twitter:title' },
  { name: 'twitter:type' },
  { name: 'twitter:url' },
  { name: 'twitter:image' },
  { name: 'twitter:description' },
  { name: 'twitter:creator' },
  { name: 'twitter:image:src' }
];

var schemaMeta = [
  { itemprop: 'title' },
  { itemprop: 'type' },
  { itemprop: 'url' },
  { itemprop: 'image' },
  { itemprop: 'description' }
];

var meta = [
  { name: 'title' },
  { name: 'author' },
  { name: 'description' }
];

createMetaTags(meta, 'Primary Meta Tags');
createMetaTags(ogMeta, 'Open Graph / Facebook');
createMetaTags(twitterMeta, 'Twitter');
createMetaTags(schemaMeta, 'Schema.org markup for Google+');