To show alert in browser by express.js (ok)

https://stackoverflow.com/questions/59536416/to-show-alert-in-browser-by-express-js

index.ejs

<script lang="javascript">
    $(document).ready(function () {
      var isAlert = <%= isAlert %>;

      if (isAlert === true) {
        var alertTitle = "<%= alertTitle %>";

        console.log(alertTitle);
        alert(alertTitle);
      }
    })
  </script>

backend:

res.render('index', { isAlert: true, alertTitle: "Oops!" })