On 2015-05-06 2:51 PM, Mike Taylor wrote:
Hey David,
On 5/6/15 13:09, dgra...@github.com wrote:
Although IE 11 supports this API as well, we have not enabled it yet.
The browser displays a popup dialog asking the user for permission to
copy to the clipboard. Hopefully this popup is removed in Edge so we
can start using JS there too. I just haven't had a chance to test with
it yet.
Thanks for mentioning this--I suspect other sites would also fall back
to Flash if our UX is similarly annoying.
Thanks David, this is really helpful. I also agree that showing UI for
this feature decreases the usability to a degree that the Flash
alternative may be preferred.
Right now, there isn't a reliable way to feature detect for this API
in JS. We use user agent detection instead, just for this feature. Any
suggestions here would be much appreciated.
You can use the document.queryCommandSupported()[1] or
document.queryCommandEnabled()[2] APIs to check for support.
So technically queryCommandSupported is the right way to feature detect
this. Note that currently our implementation of queryCommandSupported
is buggy and it returns true for all of the command names that we know
of, including "cut", "copy" and "paste". Over in
<https://bugzilla.mozilla.org/show_bug.cgi?id=1161721>, we'll fix our
implementation so that we return true for "cut" and "copy" and false for
"paste". So in Firefox, you'd be able to feature detect like this:
function isSupported() {
return document.queryCommandSupported("copy") &&
!document.queryCommandSupported("paste");
}
Chrome's implementation of this function is affected by
<https://code.google.com/p/chromium/issues/detail?id=476508>, but it
seems like it is getting fixed. I have not tested IE's implementation
of queryCommandSuported yet.
Cheers,
Ehsan
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