Prop source to get background URL

Example usage:

    background_image:
#      type: string
      $ref: "ui-patterns://url"
      title: "Background image (media)"
      allowed_bundles:
        image: 'field_media_image'
      image_style: 'large'

this is not JSON schema compliant:

      allowed_bundles:
        image: 'field_media_image'
      image_style: 'large'

We need to find a way of expressing this data in a JSON schema way.

I believe we don't need to specify both prop_types: ['string', 'url'].

We target the more specific, so URL, and it will also be available for the more generic, string

Can you try?

why is it called "Media: background image", there is nothing specific to background here, it depends of the usage in the component template, no?

Good catch.

I forgot transform relative when using an image stye.