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getEventTarget(xhr)
document.createElement('a')
was used.document.createDocumentFragment()
would be a better way to create EventTarget since the creation of HTMLElement is slightly higher thanDocumentFragment
document.createDocumentFragment()
is well supported in ES5. (just Opera 10-12 is unknown)addEventListener and removeEventListener
removeEventListener
was missing, but mentioned inindex.d.ts
WeakMap
is used for this particular usage.WeakMap
in very old browsers might be not supported, in that case,removeEventListener
is ignored.Minor fix in event handler
changedthe type must be the same as theevent.type = args[0];
toevent.type = e.type;
to avoid memory leakage of arrayargs
.args[0]
. assignment not required.