WordPress/wp-includes/blocks/post-featured-image/block.json

{
	"$schema": "https://schemas.wp.org/trunk/block.json",
	"apiVersion": 2,
	"name": "core/post-featured-image",
	"title": "Post Featured Image",
	"category": "theme",
	"description": "Display a post's featured image.",
	"textdomain": "default",
	"attributes": {
		"isLink": {
			"type": "boolean",
			"default": false
		},
		"width": {
			"type": "string"
		},
		"height": {
			"type": "string"
		},
		"scale": {
			"type": "string",
			"default": "cover"
		},
		"sizeSlug": {
			"type": "string"
		}
	},
	"usesContext": [ "postId", "postType", "queryId" ],
	"supports": {
		"align": [ "left", "right", "center", "wide", "full" ],
		"color": {
			"__experimentalDuotone": "img, .wp-block-post-featured-image__placeholder, .components-placeholder__illustration, .components-placeholder::before",
			"text": false,
			"background": false
		},
		"html": false,
		"spacing": {
			"margin": true,
			"padding": true
		}
	},
	"editorStyle": "wp-block-post-featured-image-editor",
	"style": "wp-block-post-featured-image"
}