W3C home > Mailing lists > Public > www-svg@w3.org > January 2016

Re: SVG pathSegList Deprecated via Chrome's version 48 TODAY!

From: Philip Rogers <pdr@chromium.org>
Date: Tue, 26 Jan 2016 11:05:57 -0800
Message-ID: <CAJgFLLsdo51UDQR=LLJZXsU0v+397-DwvKYhgyBB9+f9MqEADg@mail.gmail.com>
To: Francis Hemsher <fhemsher@gmail.com>
Cc: www-svg <www-svg@w3.org>

We maintain a list of all major SVG changes at

All major SVG changes are also posted to blink-dev if you'd like to follow
along: https://groups.google.com/a/chromium.org/forum/#!forum/blink-dev

On Tue, Jan 26, 2016 at 6:25 AM, Francis Hemsher <fhemsher@gmail.com> wrote:

> Hi Philip,
> It seems to me that the SVG2 updates via Chrome will take a few years to
> complete. Chrome and developers will need a specific location to announce
> and communicate. The best place for this to occur would be at
> http://www.chromium.org/developers/discussion-groups
> Merely include the group : Chromium-SVG.
> Even following the SVG2 process, this could endure for any future SVG
> changes. Believe me, the word will get out that any/all discussions for
> Chrome's SVG will happen here. This should make the SVG transitions a
> seamless and positive process for Chrome, allowing developers to appreciate
> and understand Chrome's strategies relative to SVG.
> Regards,
> Francis
> On Mon, Jan 25, 2016 at 6:35 PM, Francis Hemsher <fhemsher@gmail.com>
> wrote:
>> The issue with the path generated via D3 seems to be on my side of the
>> fence, so no followup needed.
>> As to the Chrome SVG developer notifications for upcoming SVG2
>> upgrades...Let me think on it a bit, and will get back to you.
>> ( I can't understand how I missed the console warning...I practically
>> live inside the console.log)
>> On Mon, Jan 25, 2016 at 4:12 PM, Philip Rogers <pdr@google.com> wrote:
>>> Francis,
>>> Please go ahead and create an issue on the github project for svgpathseg
>>> about the interaction with d3. If you can include a specific example that
>>> would be great.
>>> For notifying developers about SVG changes in Chrome... can you suggest
>>> specifics for how could do better? For this change, we had many large
>>> mailing list threads, a spec change and discussion on www-svg, developer
>>> outreach to every site we could find (including directly committing patches
>>> to fix svg-edit), and a warning message in the console for every user using
>>> SVGPathSeg.
>>> On Mon, Jan 25, 2016 at 8:16 AM, Francis Hemsher <fhemsher@gmail.com>
>>> wrote:
>>>> Hi Philip,
>>>> RE: your pathseg.js
>>>> I use D3 quite a lot. Your polyfill may be stepping on some of its
>>>> calculations relating to PATHSEG_CURVETO_CUBIC_SMOOTH_ABS,
>>>> per d3.svg.line().interpolate("basis"): This builds the path's "d"
>>>> attribute for the cubic "C" value.
>>>> The particular app requires about 12-14 decimal places for each point.
>>>> Is is possible your number handling may impact that?
>>>> Where would be the best forum for us to discuss this further? I plan to
>>>> create a few more tests and provide documentation to support my findings.
>>>> Thanks,
>>>> Francis
>>>> On Mon, Jan 25, 2016 at 9:28 AM, Francis Hemsher <fhemsher@gmail.com>
>>>> wrote:
>>>>> BTW, I've tested your polyfill packet, and so far, looks good,
>>>>> Thanks
>>>>> On Mon, Jan 25, 2016 at 9:02 AM, Francis Hemsher <fhemsher@gmail.com>
>>>>> wrote:
>>>>>> Hi Philip,
>>>>>> I totally support upgrading SVG API's to SVG2. However, it can be
>>>>>> handled as a very positive process by Chrome, rather than by shocking
>>>>>> developers via a piecemeal approach as has happened with pathSeg. I'm
>>>>>> suggesting a more formal presentation by Chrome addressing SVG's upgrades
>>>>>> as a whole. You will find SVG developers will enthusiastically jump on
>>>>>> board and help make it a seamless and enjoyable happening, celebrating
>>>>>> Chrome, rather than berating it.
>>>>>> Regards,
>>>>>> Francis
>>>>>> On Sun, Jan 24, 2016 at 6:45 PM, Philip Rogers <pdr@google.com>
>>>>>> wrote:
>>>>>>> [-list]
>>>>>>> Hi Francis,
>>>>>>> I'm Philip, one of the folks behind removing this from Chrome. I'm
>>>>>>> sorry to hear this broke your pages. You may be able to use the polyfill I
>>>>>>> wrote at https://github.com/progers/pathseg. Other folks have found
>>>>>>> this to be a drop-in replacement.
>>>>>>> On Sun, Jan 24, 2016 at 2:32 PM, Francis Hemsher <fhemsher@gmail.com
>>>>>>> > wrote:
>>>>>>>> Initially it was somewhat of a challenge 15 years ago to wrap my
>>>>>>>> head around building SVG paths via pathSegList  and its methods. I
>>>>>>>> persevered, and thereby have about 200 files within various apps online
>>>>>>>> that use this feature.
>>>>>>>> I believe Google has seriously jumped the gun in dumping this
>>>>>>>> feature with no warning to developers. It will take quite a few
>>>>>>>> hours/days/weeks to fix my pages to run in Chrome. In the meantime about
>>>>>>>> 50% of my users will crash when getting into the SVG path.
>>>>>>>> I'm hoping for a bit of feedback to the Chrome folks to reconsider
>>>>>>>> this, and a rollback to support of SVG's pathSegList. HELP!
>>>>>>>> See the following:
>>>>>>>>  https://code.google.com/p/chromium/issues/detail?id=539385
>>>>>>>> https://code.google.com/p/chromium/issues/detail?id=568735
>>>>>>>> Regards & Thanks,
>>>>>>>> Francis Hemsher
Received on Tuesday, 26 January 2016 19:06:47 UTC

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