force to use amp-img option attribute in amp-carousel

[imansa]

according to following documents, on Image gallery with preview part we must use option attribute on amp-img tags to make a slider with preview

amp-carousel sample document

What's the issue?

according to amp-carousel documents on Image gallery with preview part, we must use option attribute on amp-img tags to make a slider with preview. but option attribute is not in amp-img allowed attributes in standard and will be removed by amp validators like this one

How do we reproduce the issue?

it is about amp-carousel standard an is visible in it's sample page and do not need any test case

What browsers are affected?

All browsers

Which AMP version is affected?

1905091827220

[aghassemi]

Hi @imansa option attribute becomes valid when inside amp-selector, which is needed to make that example work. You can also use amp-bind to make a a photo gallery. One of the codelabs we have (Building Beautiful, interactive, canonical AMP pages) takes you through both approaches.

Hope this helps

-Ali

[imansa]

Hi Ali

you said "option attribute becomes valid when inside amp-selector". where is it's document ? i am try to create an issue like this one on validator to fix it's problems. but i need some document to show my issue is valid according to amp standards. being a attribute valid when tag is child of other tag is some complex and i do not know how to find it's document for it and same problems in future.

thanks a lot

[aghassemi]

@imansa option is an attribute that is meant for children of amp-selector per https://amp.dev/documentation/components/amp-selector but those children can by anything themselves (e.g. div, amp-img, etc..)