Block widgets interact with the editor using what mechanism?

Block widgets interact with the editor using what mechanism?

• A. REST API calls
• B. Cross-document messages
• C. SOAP requests
• D. Email triggers

Answer: (B)

Block widgets talk to the editor using cross-document messaging. When a widget runs inside an iframe, it can’t directly reach the editor’s DOM, so it uses the browser’s postMessage mechanism to send and receive structured messages between the widget (in the iframe) and the editor (the parent window). This lets the widget initialize, request or push configuration, and respond to user actions in real time, all while staying securely separated by origin checks. REST API calls or SOAP requests are server-to-server or client-to-server communications and aren’t how the in-editor widget and editor collaborate in the browser. Email triggers aren’t related to in-editor interactions either, as they’re about automation workflows, not live UI integration.

Block widgets talk to the editor using cross-document messaging. When a widget runs inside an iframe, it can’t directly reach the editor’s DOM, so it uses the browser’s postMessage mechanism to send and receive structured messages between the widget (in the iframe) and the editor (the parent window). This lets the widget initialize, request or push configuration, and respond to user actions in real time, all while staying securely separated by origin checks.

REST API calls or SOAP requests are server-to-server or client-to-server communications and aren’t how the in-editor widget and editor collaborate in the browser. Email triggers aren’t related to in-editor interactions either, as they’re about automation workflows, not live UI integration.