Test the any-hover media feature with machMedia. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". window.matchMedia("(any-hover)").matches = true window.matchMedia("(any-hover: hover)").matches = true window.matchMedia("(any-hover: on-demand)").matches = false window.matchMedia("(any-hover: none)").matches = false window.matchMedia("(any-hover: Hover)").matches = true window.matchMedia("(any-hover: On-demand)").matches = false window.matchMedia("(any-hover: None)").matches = false window.matchMedia("(Any-Hover: hover)").matches = true window.matchMedia("(Any-Hover: on-demand)").matches = false window.matchMedia("(Any-Hover: none)").matches = false PASS successfullyParsed is true TEST COMPLETE