runner.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Jest</title>
    <style>
      body {
        background: #225;
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
        color: #eef;
        font-size: 14px;
        line-height: 1.5;
        padding: 7px 15px;
      }
    </style>
  </head>
  <body>
    <h2>Executing tests...</h2>
    <p>Please reference the console for output.</p>

    <script>
      var jest = require('jest')
      var qs = require('querystring')
      var options = qs.parse(window.location.search)

      jest.runCLI(options, __dirname, (content) => {
        window.close()
      })
    </script>
  </body>
</html>