nteractive.enableControls(true);
    },

    //
    // Enable/disable the input controls
    //
    enableControls(enable = true) {
      for (const name of ['display', 'latex', 'speech', 'braille', 'entities', 'render']) {
        document.querySelector(`#${name}`).disabled = !enable;
      }
    },
  };
  </script>
</head>

<body>

<div id="frame">

<h1>Custom Build of MathJax with <code>toSpeech()</code></h1>

<div class="show display">
 
  <textarea id="input" rows="15" cols="10">
%
% Enter TeX commands