146901 2015-07-13 07:53:46 -0700 Override preventDefault() of touch/gestures in iOS Content Blocker 2015-07-13 12:19:19 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) iPhone / iPad Other NEW InRadar P2 Enhancement --- 1 deano.uk webkit-unassigned achristensen benjamin deano.uk webkit-bug-importer oldest_to_newest 1109090 0 deano.uk 2015-07-13 07:53:46 -0700 Some websites are using preventDefault() on touch/gesture evens within javascript to prevent the callout menu. For example: If you visit news.google.com on an iPhone, you are unable to long-tap the hyperlinks to copy link/open in new tab/add to reading list. The only workaround I can find for this particular website is to refresh into a desktop view. The particular script that handles these events can be blocked via content blocker, however blocking the whole script affects the page loading correctly as overriding touch handlers are a small part of what the script as a whole does. Maybe have an option within the blockerList.json to ignore 'preventDefault()' of touch/gesture overrides? 1109161 1 benjamin 2015-07-13 12:12:16 -0700 This one is very tricky. There are many valid use cases for calling preventDefault() on touch events. I suspect we would mostly break content if rules start ignore it. A problem is that we do not provide a way for the page to only cancel certain native gestures. It is quite possible the long press is only cancelled as a by-product of another gesture handling. I'll import this too to keep track of this particular problem, but IMHO extending the platform should have the priority. 1109168 2 webkit-bug-importer 2015-07-13 12:19:19 -0700 <rdar://problem/21798014>