Internet Explorer 11 (IE11) does not support newer JavaScript functions that clients or Piano may implement in their code.
For example, IE 11 and older browsers don't support ES6 JS functions.
Piano supports and is compatible with Microsoft Edge. Unfortunately, we cannot support backward compatibility for IE11.
Please note that Piano is no longer conducting end-user testing or quality assurance for IE11.
More information about the retirement of Internet Explorer 11 is available here.