sass-site/source/assets/js/components/sass-syntax-switcher.js

$(function() {
  $(".code-example").each(function() {
    var figure = $(this);
    var id = figure.attr("data-unique-id");

    var ul = $("<ul></ul>");

    if (figure.find(".sass").length) {
      ul.prepend("<li><a href='#example-" + id + "-sass'>Sass</a></li>");
    }

    if (figure.find(".scss").length) {
      ul.prepend("<li><a href='#example-" + id + "-scss'>SCSS</a></li>");
    }

    var hasCssTab = figure.find(".css").length;
    if (hasCssTab) {
        ul.prepend(
            $("<li class='css-tab'></li>")
                .prepend("<a href='#example-" + id + "-css'>CSS</a>"));
    }

    figure.prepend(ul).tabs({active: hasCssTab ? 1 : 0});
  });

  // Switch ALL the tabs (Sass/SCSS) together
  var
    noRecursion = false,
    jqA = $( "a.ui-tabs-anchor" ),
    jqASass = jqA.filter( ":contains('Sass')" ).click(function() {
      if ( !noRecursion ) {
        noRecursion = true;
        jqASass.not( this ).click();
        noRecursion = false;
      }
    }),
    jqASCSS = jqA.filter( ":contains('SCSS')" ).click(function() {
      if ( !noRecursion ) {
        noRecursion = true;
        jqASCSS.not( this ).click();
        noRecursion = false;
      }
    })
  ;
});