Re: [webcomponents] [Custom Elements]: Custom elements should be display: block by default (#224)

@rniwa suggested:

> Do most of those custom elements have a shadow DOM? I think I would be okay with making an element with a shadow DOM use display: block by default as that would be backwards compatible.

In Polymer land we do make a lot of non-visual elements like iron-ajax, iron-selector, etc. and those don't need to be `display: block`, nor do they have Shadow DOM. Only our UI elements require `display: block` and those coincidentally also all have Shadow DOM. Would this be a decent compromise?

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/webcomponents/issues/224#issuecomment-193938549