[1] Fix Issue 53 · w3c/uievents@dcb45bf ( 版) <https://github.com/w3c/uievents/commit/dcb45bfa6c4185d474341078c8a515322f7ffc5b>
[2] (before)Edit -> (before)Input, closes #87 · w3c/editing@a87f2b9 ( 版) <https://github.com/w3c/editing/commit/a87f2b9c38891756f695067e614308af66abb8c2>
[3] remove beforeinput for copy, see issue #135 (johanneswilm著, ) <https://github.com/w3c/editing/commit/eee72c655fd665c6bdea48ca219f7e72f550f9cf>