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

{
	"apiVersion": 2,
	"name": "core/site-title",
	"title": "Site Title",
	"category": "design",
	"description": "Displays and allows editing the name of the site. The site title usually appears in the browser title bar, in search results, and more. Also available in Settings > General.",
	"textdomain": "default",
	"attributes": {
		"level": {
			"type": "number",
			"default": 1
		},
		"textAlign": {
			"type": "string"
		}
	},
	"supports": {
		"align": [ "wide", "full" ],
		"html": false,
		"color": {
			"gradients": true,
			"text": false,
			"link": true
		},
		"spacing": {
			"padding": true,
			"margin": true
		},
		"typography": {
			"fontSize": true,
			"lineHeight": true,
			"__experimentalFontFamily": true,
			"__experimentalTextTransform": true,
			"__experimentalFontStyle": true,
			"__experimentalFontWeight": true
		}
	},
	"editorStyle": "wp-block-site-title-editor"
}