[1] Drop SVGZoomEvent. · w3c/svgwg@3844475 ( 版) <https://github.com/w3c/svgwg/commit/3844475c05b865e961a0bc52cd63e627412360e2>
[2] Drop support for SVGZoomEvent in createEvent() (foolip著, ) <https://github.com/whatwg/dom/commit/80b1640147650de7773062aedfc5672bc8c6fb8f>
[3] document.createEvent() supports lots of events that most UAs do not support initializers for · Issue #362 · whatwg/dom () <https://github.com/whatwg/dom/issues/362>