If the test added via addTest is NOT a function or Boolean Modernizr dies. Prevent cases such as `Modernizr.addTest("breakeverything", undefined);` from annihilating the internet.
If the test added via addTest is NOT a function or Boolean Modernizr dies.
Prevent cases such as `Modernizr.addTest("breakeverything", undefined);` from annihilating the internet.
Modernizr/Modernizr,Modernizr/Modernizr