WordPress/wp-includes/blocks/rss/block.json

{
	"$schema": "https://schemas.wp.org/trunk/block.json",
	"apiVersion": 3,
	"name": "core/rss",
	"title": "RSS",
	"category": "widgets",
	"description": "Display entries from any RSS or Atom feed.",
	"keywords": [ "atom", "feed" ],
	"textdomain": "default",
	"attributes": {
		"columns": {
			"type": "number",
			"default": 2
		},
		"blockLayout": {
			"type": "string",
			"default": "list"
		},
		"feedURL": {
			"type": "string",
			"default": ""
		},
		"itemsToShow": {
			"type": "number",
			"default": 5
		},
		"displayExcerpt": {
			"type": "boolean",
			"default": false
		},
		"displayAuthor": {
			"type": "boolean",
			"default": false
		},
		"displayDate": {
			"type": "boolean",
			"default": false
		},
		"excerptLength": {
			"type": "number",
			"default": 55
		}
	},
	"supports": {
		"align": true,
		"html": false,
		"interactivity": {
			"clientNavigation": true
		}
	},
	"editorStyle": "wp-block-rss-editor",
	"style": "wp-block-rss"
}