(function(){
    'use strict';

    /*
    Create intra-page links
    Requires that your headings already have an `id` attribute set (because that's what jekyll does)
    For every heading in your page, this adds a little anchor link `#` that you can click to get a permalink to the heading.
    Ignores `h1`, because you should only have one per page.
    The text content of the tag is used to generate the link, so it will fail "gracefully-ish" if you have duplicate heading text.
     */

    var headingNodes = [], results, link,
        tags = ['h2', 'h3', 'h4', 'h5', 'h6'];

    tags.forEach(function(tag){
      results = document.getElementsByTagName(tag);
      Array.prototype.push.apply(headingNodes, results);
    });

    headingNodes.forEach(function(node){
      link = document.createElement('a');
      link.className = 'deepLink';
      link.textContent = '¶';
      link.href = '#' + node.getAttribute('id');
      node.appendChild(link);
    });

  })();