> However the inputmode attribute is now supported by all the mobile browsers we test in. This isn't extensive, which might be a tad misleading if you don't double check. They test on Chrome & Samsung for Android, and iOS is only the one engine. And those three browsers seem to be the only mobile browsers that have implemented it. (Well, Opera Mobile as well). [0] Desktop support is also extremely spotty. This seems…
Arguably it's less important there if one of the main motivations is that on mobile browsers will display a numeric keypad instead of full keyboard (which is my impression from skimming the article)