Indeed, the switch component is not compatible with IE 9 and IE 10. The reason for that is in the layout -- building it, we used flexbox layout, which is not supported on IE 9 and only partially supported on IE 10.
With some tweaks, the switch can be made to work on IE 9 to some extent. For instance, there will be no animations when toggling the states -- instead the state will just "jump".
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