theme/monokai");
      renderedEditor.getSession().setMode("ace/mode/html");
      renderedEditor.setOption("readOnly", true);
      renderedEditor.getSession().setUseWorker(false);

      const runButton = document.getElementById("run");
      const errors = document.getElementById("errors");
      function renderPlayground() {
          const tpl = teraEditor.getValue();
          const ctx = ctxEditor.getValue();
          const {value, error} = window.renderTera(tpl, ctx);
          if (error) {
       