Branding the CAS User Interface (UI) involves editing the CSS stylesheet and also a small collection of relatively simple HTML include files, also known as views. Optionally, you may also wish to modify the text displayed and/or add additional Javascript effects on these views.

Browser Support

CAS user interface should properly and comfortably lend itself to all major browser vendors:

  • Google Chrome
  • Mozilla Firefox
  • Apple Safari
  • Microsoft Edge
  • Internet Explorer (v11 only)

Note that certain older version of IE, particularly IE 9 and below may impose additional difficulty in getting the right UI configuration in place. The libraries used for the user interface (Bootstrap and Material.io) do not support Internet Explorer 9 or below.

:information_source: Supported Browsers

The supported browsers listed here are in reference to the default CAS user interface. Customizations can be implemented to support other browsers using the overlay, themes, etc.

Internet Explorer

To instruct CAS to render UI in compatibility mode, the following is added automatically to relevant UI components:

<meta http-equiv="X-UA-Compatible" content="IE=edge" />

CSS & Javascript

See this guide for more info.


See this guide for more info.


See this guide for more info.


See this guide for more info.