Make Your Vanilla More SEO Friendly – Adding noindex to Duplicate Pages

For whom – Those who use Vanilla WordPress plugin to use forum for blog comments.

Problem – Whenever a comment is made in blog page, a subsequent and similar forum discussion is automatically made which has same title as blog post. Now both are indexed by Google and creating duplicate content. Example here.

Solution –

Each Vanilla discussion page automatically inserts body class of chosen category. Now if your comment belongs to category blog-comments, then use this code –

<script>
  if (document.body.classList.contains('Section-Category-blog-comments')) {
customMeta=document.createElement('meta');
customMeta.name='robots';
customMeta.content='noindex,follow';
document.getElementsByTagName('head')[0].appendChild(customMeta);
}
</script>

This will automatically insert no-index in duplicate discussions page.

http://wordpress.org/extend/plugins/vanilla-forums/