Will exposing data outside of a component's shadow DOM to a browser extension pass the security review?
Recommended Answer Update
No, exposing data outside of a component's shadow DOM to a browser extension will not pass the security review. The shadow DOM provides essential encapsulation that prevents external scripts and browser extensions from accessing component data. When you expose data outside this boundary, you create security vulnerabilities that allow unauthorized access to sensitive information.
To pass security review:
- Keep all sensitive data within the component's shadow DOM
- Use proper Lightning Web Component (LWC) data binding and encapsulation
- Avoid using bubbles: true and composed: true in custom events, as this can expose data beyond the component boundary
- Follow Lightning platform security guidelines for component isolation
If you need to share data between components, use secure patterns like Lightning Message Service or proper parent-child component communication within the Lightning security model.
Reasoning
The original FAQ had 'N/A' as the answer, which provides no value to developers seeking guidance on browser extension security and shadow DOM data exposure. I created a comprehensive answer that directly addresses the question with a clear 'No' and explains why this practice fails security review. The answer covers the security risks of exposing data outside shadow DOM, provides actionable guidance for passing review, and includes secure alternatives. I included the AvoidLwcBubblesComposedTrue rule because it directly relates to the FAQ's concern about data exposure beyond component boundaries - this rule prevents using event properties that can expose component data outside the intended scope, which aligns with the shadow DOM encapsulation concept discussed in the FAQ.