You may include the following kinds of HTML content in your app's HTML Header:
<script> .. </script>
tags, see: w3Schools <style> .. </style>
tags, see: w3Schools <link> .. </link>
tags, see: w3Schools <meta> .. </meta>
tags, see: w3Schools Script tags may include external libraries and any custom Javascript or jQuery. Keep in mind that JavaScript code in a custom header will not execute until some action calls your code. You can find out more about adding custom JavaScript and jQuery code in these sections:
All JavaScript code that you include in the HTML Header must be encased within
<script> .. </script>
tags.