static/index.ejs

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8">
    <meta name="robots" content="NONE,NOARCHIVE" />
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title><%= htmlWebpackPlugin.options.title || 'Sentry Dev'%></title>
    <script>
      function __sentryMark(name) {
        if (!window.performance || typeof window.performance.mark !== 'function') { return; }
        window.performance.mark(name);
      }
      __sentryMark('head-start');
    </script>
  </head>

  <body>
    <% if (htmlWebpackPlugin.options.unsupportedBrowser) { %>
    <style>.unsupported-browser { display: none; }</style>
    <div class="unsupported-browser">
      Sorry, your browser is not supported.  Please upgrade to
      the latest version or switch your browser to use this site.
      See <a href="http://outdatedbrowser.com/">outdatedbrowser.com</a>
      for options.
    </div>
    <% } %>

    <div id="blk_router">
      <div class="loading triangle">
        <div class="loading-mask"></div>
        <div class="loading-indicator" data-test-id="loading-indicator">
          <img src="<%=require('sentry-images/sentry-loader.svg')%>" />
        </div>
        <div class="loading-message">
          <p>Please wait while we load an obnoxious amount of JavaScript.</p>
          <p>
            <small>You may need to disable adblocking extensions to load Sentry.</small>
          </p>
        </div>
      </div>
    </div>

    <% if (htmlWebpackPlugin.options.window) { %>
    <script>
      <% for (var varName in htmlWebpackPlugin.options.window) { %>
          window['<%=varName%>'] = <%= JSON.stringify(htmlWebpackPlugin.options.window[varName]) %>;
        <% } %>
    </script>
    <% } %>
  </body>
</html>