internet_config_dialog_container.html

<!doctype html>
<html dir="$i18n{textdirection}" lang="$i18n{language}">
  <head>
    <meta charset="utf-8">
    <title>$i18n{title}</title>
    <link rel="stylesheet" href="chrome://resources/css/text_defaults_md.css">
    <link rel="stylesheet" href="chrome://resources/chromeos/colors/cros_styles.css">
    <link rel="stylesheet" href="chrome://theme/colors.css?sets=legacy,sys">
  </head>
  <style>
    body,
    html {
      height: 100%;
      margin: 0;
      overflow: hidden;
      width: 100%;
    }

    #content {
      background-color: var(--cros-bg-color);
      height: 100%;
      overflow: auto;
    }
  </style>
  <body class="jelly-enabled">
    <div id="content">
      <internet-config-dialog></internet-config-dialog>
      <script type="module" src="internet_config_dialog.js"></script>
    </div>
  </body>
</html>

chromium/chrome/browser/resources/chromeos/internet_config_dialog/internet_config_dialog_container.html