index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <link rel="stylesheet" type="text/css" id="theme-link">
    <title>Another Redis DeskTop Manager</title>
  </head>
  <body>
    <!-- this script must be placed here after body -->
    <script type="text/javascript">
      function globalChangeTheme(theme) {
        theme  && (localStorage.theme = theme);
        !theme && (theme = localStorage.theme);

        const themeName =  (theme  == 'dark' ? 'dark' : 'chalk');
        const themeHref = 'static/theme/' + themeName + '/index.css';

        document.getElementById('theme-link').href = themeHref;
        themeName == 'dark' ? document.body.classList.add('dark-mode') :
                              document.body.classList.remove('dark-mode');
      }

      // theme init
      globalChangeTheme();
    </script>

    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>