First supported in Firefox in Firefox 4, if that is unclear. On Tue, Apr 12, 2011 at 1:14 PM, Kyle Huey <me@kylehuey.com> wrote: > File.slice was first supported in Firefox 4. > > - Kyle > > > On Tue, Apr 12, 2011 at 1:08 PM, Jian Li <jianli@chromium.org> wrote: > >> The biggest concern is that this is a breaking change and quite a few web >> applications have already been using it. As far as I know, File.slice(start, >> length) has been supported as early as Chrome 6 and Safari 5. Also Firefox 3 >> is supporting it. How do we communicate with web developers about this >> breaking change if we decide to make the change? >> >> Jian >> >> >> On Tue, Apr 12, 2011 at 11:34 AM, Arun Ranganathan <arun@mozilla.com>wrote: >> >>> On 4/12/11 2:24 PM, Jonas Sicking wrote: >>> >>>> Hi All, >>>> >>>> It was recently (yesterday) pointed out to me that we let a bad >>>> spec-bug slip through for File.slice. It doesn't match the argument >>>> semantics of Array.slice which can be very confusing for developers. >>>> >>>> In Array.slice the second argument is the index of the last item to be >>>> included in the returned slice. >>>> In File.slice the second argument is the number of bytes included in >>>> the returned slices. >>>> >>>> In other words, it's Array.slice(start, end), but File.slice(start, >>>> length). >>>> >>>> Additionally, in Array.slice the second argument is optional. >>>> >>>> File.slice is currently shipped by Chrome and Firefox 4. I would be >>>> fine with fixing this in Firefox 4.0.1, however that only makes sense >>>> if the chrome folks are fine with fixing it in their implementation. >>>> >>>> So consider this an official request, would chrome be ok with changing >>>> the spec here? >>>> >>>> / Jonas >>>> >>>> >>> I'm bummed that we collectively let this slip through the cracks, and >>> personally think it's early enough to fix it. But we should also decide how >>> closely to match Array.slice. Should we allow code of the sort >>> >>> file.slice(-80)? >>> >>> Code of that sort is allowed with Array.slice. >>> >>> MDC has good developer docs about what's in Firefox for Array.slice: >>> >>> >>> https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/slice >>> >>> Developers may have already discovered file.slice (e.g. see >>> http://hacks.mozilla.org/2011/04/resumeupload/), so fixing this will >>> involve some messaging. >>> >>> -- A* >>> >>> >> >
Received on Tuesday, 12 April 2011 20:15:58 UTC