Make "layout=intrinsic" compatible with SSR and handle resize events

[jpettitt]

Need to update https://github.com/ampproject/amphtml/blob/master/src/custom-element.js#L613-L617 to handle SSR'd elements with instrinsic layout.

Need to ensure that resize events correctly update the sizing scaling SVG at
https://github.com/ampproject/amphtml/blob/master/src/custom-element.js#L691

[jpettitt]

@aghassemi I may be able to take this depending on other workload and what the timing of SSR for layout=intrinsic is.

cc @honeybadgerdontcare @jridgewell

[ampprojectbot]

This issue hasn't been updated in awhile. @aghassemi Do you have any updates?

[sebastianbenz]

I've started looking into this for AMP Optimizer (and to unblock SSR for WP). What's the problem with resize events?

Need to ensure that resize events correctly update the sizing scaling SVG at
https://github.com/ampproject/amphtml/blob/master/src/custom-element.js#L691

[jridgewell]

He's talking about

amphtml/src/custom-element.js

Line 691 in 2246723

setStyle(sizer, 'paddingTop', '0');

. It needs to be set on the sizer in case the element's size changes before we initialize the custom element.