4 ms·I'm not aware of that. In any case they still work fine in React v16.by erokar 8y agoI'm not aware of that. In any case they still work fine in React v16.MBCook 8y agoThat was an impression I’ve gotten. I’m not sure if it’s true.acemarke 8y agoPropTypes aren't being phased out, but they were moved to a separate package since the actual implementation isn't React-specific.