test/test_materialize.html

<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html;charset=utf-8">

  <!-- materialize css -->
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.6/css/materialize.min.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.6/js/materialize.min.js"></script>

  <link href="../dist/jsoneditor.css" rel="stylesheet" type="text/css">
  <script src="../dist/jsoneditor.js"></script>

  <style>
    body {
      font: 10.5pt arial;
      color: #4d4d4d;
      line-height: 150%;
      width: 500px;
      padding-left: 40px;
    }

    code {
      background-color: #f5f5f5;
    }

    #jsoneditor {
      width: 500px;
      height: 500px;
    }
  </style>
</head>
<body>

<p>
  Switch editor mode using the mode box.
  Note that the mode can be changed programmatically as well using the method
  <code>editor.setMode(mode)</code>, try it in the console of your browser.
</p>

<form>
  <div id="jsoneditor"></div>
</form>

<script>
  var container, options, json, editor;

  container = document.getElementById('jsoneditor');

  options = {
    mode: 'tree',
    modes: ['code', 'form', 'text', 'tree', 'view'], // allowed modes
    onError: function (err) {
      alert(err.toString());
    },
    onChange: function () {
      console.log('change');
    },
    indentation: 4,
    escapeUnicode: true
  };

  json = {
    "array": [1, 2, [3,4,5]],
    "boolean": true,
    "htmlcode": '&quot;',
    "escaped_unicode": '\\u20b9',
    "unicode": '\u20b9,\uD83D\uDCA9',
    "return": '\n',
    "null": null,
    "number": 123,
    "object": {"a": "b", "c": "d"},
    "string": "Hello World",
    "url": "http://jsoneditoronline.org"
  };

  editor = new JSONEditor(container, options, json);

  console.log('json', json);
  console.log('string', JSON.stringify(json));
</script>
</body>
</html>