WordPress/wp-includes/blocks/post-title/block.json

{
	"apiVersion": 2,
	"name": "core/post-title",
	"title": "Post Title",
	"category": "design",
	"description": "Displays the title of a post, page, or any other content-type.",
	"textdomain": "default",
	"usesContext": [ "postId", "postType" ],
	"attributes": {
		"textAlign": {
			"type": "string"
		},
		"level": {
			"type": "number",
			"default": 2
		},
		"isLink": {
			"type": "boolean",
			"default": false
		},
		"rel": {
			"type": "string",
			"attribute": "rel",
			"default": ""
		},
		"linkTarget": {
			"type": "string",
			"default": "_self"
		}
	},
	"supports": {
		"align": [ "wide", "full" ],
		"html": false,
		"color": {
			"gradients": true,
			"link": true
		},
		"typography": {
			"fontSize": true,
			"lineHeight": true,
			"__experimentalFontFamily": true
		}
	},
	"style": "wp-block-post-title"
}