javascript set meta tag code example

Example 1: javascript change meta tag

document.querySelector('meta[name="description"]').setAttribute("content", _desc);

Example 2: append meta tag to head javascript

<script>  var link = document.createElement('meta');  link.setAttribute('name', 'shareaholic:url');  link.content = document.location;  document.getElementsByTagName('head')[0].appendChild(link);</script>