I have tried the following:
-ms-transform: translateY(calc(-100% - 70px));
-ms-transform: translateY(calc(- 100% - 70px));
-ms-transform: translateY(calc(0 - 100% - 70px));
-ms-transform: translateY(calc(0px - 70px - 100%));
None of this is picked up by IE9. Any idea how to get this to work in IE9? Works in Chrome and other modern browsers.
caniuse reports that:
IE10 and IE11 don't support using calc() inside a transform.
View the official bug report at MS IE trac (seems to be working on Edge tho)