This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
mousedown event has been fired at the element, if and when sufficient pressure has been applied to the mouse or trackpad button to qualify as a "force click," Safari begins sending
webkitmouseforcedown events to the element.
webkitmouseforcedown is a proprietary, WebKit-specific event. It is part of the Force Touch events feature.
Not part of any specification. Apple has a description at the Mac Developer Library.
BCD tables only load in the browser