chromium/content/test/data/android/leaf_node_updates.html

<!-- Simple file to update text data programmatically -->
<html>
  <head>
    <script>
      const textNode = document.createTextNode("");

      function createText() {
        const div = document.querySelector("div");
        textNode.data = "Example text 1";
        div.appendChild(textNode);
      }

      function updateText() {
        textNode.data = "Example text 2";
      }
    </script>
  </head>
  <body onload="createText()">
    <div id="test"></div>
  </body>
</html>