Hi Egor,

I'm not sure what you mean about 1.0 not working with Chrome 63. The only
change I see in Chrome 63 that might affect Polymer apps is that the /deep/
combinator will no longer pierce shadow trees. Which will affect people who
are using native shadow DOM on Chrome with 1.0; but if you're using
Bootstrap with Polymer, in all probability you are *not* using native
shadow DOM, and this shouldn't affect you. All of YouTube's new UI (to name
just one site) is running Polymer 1.x, and you can be pretty sure that
Chrome is not going to roll out a change that breaks YouTube.

As for 2.0, the difference here—since bootstrap-type global CSS selectors
won't work with either v0 or v1 shadow DOM—is that 2.0 uses native shadow
DOM by default. You can get around that by forcing the shady DOM polyfills
to run even on browsers with native shadow DOM. Of course, it won't be as
performant as native shadow DOM.

https://www.polymer-project.org/2.0/docs/polyfills#settings

Thanks,
Arthur





On Fri, Sep 22, 2017 at 4:49 PM, Egor Egorov <[email protected]> wrote:

> Hello.
>
> We are running a huge enterprise application written with Polymer 1.0 and
> Bootstrap. Now what we face is a bit of devastating: 1.0 is going to stop
> working around Chrome 63 and 2.0 flat-out ignores virtually all of the
> javascript libraries in existence, hence no Bootstrap on Polymer 2.0. As
> much as we love Polymer 1.0, we have found no way to integrate existing JS
> libraries we use with the 2.0.
>
> What would be a good migration path for a Polymer 1.0 application?
>
> Follow Polymer on Google+: plus.google.com/107187849809354688692
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