Bug 207942

Summary:	allow-top-navigation-by-user-activation doesn't work with XHR
Product:	WebKit	Reporter:	Mustaq Ahmed <mustaq>
Component:	Frames	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	binlu, webkit-bug-importer, wenhaoshi
Priority:	P2	Keywords:	InRadar
Version:	Other
Hardware:	iPhone / iPad
OS:	iOS 12

Description Mustaq Ahmed 2020-02-19 08:56:33 PST

It seems WebKit doesn't allow a subframe with the sandbox flag "allow-top-navigation-by-user-activation" to navigate the top frame away even with user activation.  The problem seems to occur only with XHR.  Async calls through setTimeout works fine.

We (Chrome) have an internal client blocked by this behavior.

Repro: http://mustaqahmed.github.io/web/top-nav-by-user-activation/

Comment 1 Radar WebKit Bug Importer 2020-02-19 23:03:00 PST

<rdar://problem/59620231>