(function($, Modules) {
  'use strict';

  Modules.AnchoredHeadings = function() {
    this.start = function($element) {
      var headings = $element.find('h1, h2, h3, h4, h5, h6');
      headings.each(injectAnchor);
    };

    function injectAnchor() {
      var $this = $(this);
      $this.addClass('anchored-heading');
      $this.prepend(
        '<a href="#' + $this.attr('id') + '" class="anchored-heading__icon" aria-hidden="true"></a>'
      );
    };
  };
})(jQuery, window.GOVUK.Modules);