Custom Code – Backslash in JavaScript code removed

Tried to insert JavaScript code before </head> and got a syntax error. It appears that a backslash in a regex was lost. For example, enter this into the ASE configuration:

<script>
  var currentPagePath = window.location.pathname.replace(/\/$/, '');
</script>

In the site front end, the backslash is missing, resulting in a syntax error.