File Content: block.json { "apiVersion": 2, "name": "core/html", "title": "Custom HTML", "category": "widgets", "description": "Add custom HTML code and preview it as you edit.", "keywords": [ "embed" ], "textdomain": "default", "attributes": { "content": { "type": "string", "source": "html" } }, "supports": { "customClassName": false, "className": false, "html": false }, "editorStyle": "wp-block-html-editor" } Submit