How we built it

Fractional coordinates in MouseEvents

Update the types of all coordinates in MouseEvents from long to double to make the coordinates more precise for PointerEvents on high-DPI devices. Note, however, that the only browser-fired events that will change are PointerEvents. MouseEvents will continue to have integral coordinates for backward compatibility.



Working draft or equivalent

Status in Chromium

In development (launch bug)

Consensus & Standardization


Last updated on 2016-11-08