text: window.onload = function () {
      var myEditor = new MediumEditor(".container", {
          buttons: [
              "bold"
            , "italic"
            , "underline"
            , "anchor"
            , "header1"
            , "header2"
            , "quote"
            , "customHtml"
          ]
        , extensions: {
              "customHtml": new CustomHtml({
                  buttonText: "<hr>"
                , htmlToInsert: "<hr class='someclass'>"
              })
          }
      });
  };
  