Fix the errors in the case that e.g. an external code calls .pushState without path. #558
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This inspection of e.state.path is needed because anyone can call .pushState with an arbitrary state argument.
akeyhero
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Hi.
I think we should inspect that e.state.path is not null nor undefined
because anyone can call
.pushStatewith an arbitrary state argument.https://developer.mozilla.org/en-US/docs/Web/API/PopStateEvent
I actually encountered this problem when I use an out-of-control external js code, which calls
.pushState.This should fix #293 .