Web animations is not loaded by Polymer

[jonrimmer]

Web animations is listed as a foundation technology in Polymer, but it is not loaded when polymer.js is loaded.

If web animations is a foundational part of Polymer, then it should be loaded alongside Imports, Custom Elements, MDV, etc. Otherwise, it should be not be listed as part of the platform. The current situation is simply confusing for new users.

[sjmiles]

I agree that this situation is confusing, thanks for making an issue.

The only reason this isn't a no-brainer is that no part of polymer itself depends on Web Animations, which makes it stand apart from the other polyfills.

I want to do a little analysis about the impact on the load size and whether it's worth having a flag to make it opt-out.

However, I expect the answer will be just to include it. We will update this ticket when we make a move.

[sorvell]

Due to the size of the polyfill we've opted not to include web-animations in the platform build for now.

We've included an html import document in the polymer-elements repo that makes it easy to include the polyfill (https://github.com/Polymer/polymer-elements/blob/master/polymer-animation/web-animations.html).