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.
Fired after the
mousedown event as soon as sufficient pressure has been applied for it to qualify as a "force click".
webkitmouseforcedown is a proprietary, WebKit-specific event. It is part of the
Not part of any specification. Apple has a description at the Mac Developer Library.