[WIP] WIP Address feedback from PR #424 on mdd-update-21.0.0

[Copilot]

• Understand the issue: styleElem is optional but accessed without null checks
• Add null safety check in onMessage method before accessing styleElem.textContent
• Run code review - No issues found
• Run security scan - No security vulnerabilities detected

Summary

Successfully addressed the feedback by adding a null safety check for the styleElem property in the onMessage method. The property is declared as HTMLStyleElement | undefined but was being accessed directly without checking if it exists first. While styleElem is initialized in ngOnInit(), TypeScript requires explicit null checking for optional properties. The fix ensures type safety and prevents potential runtime errors.

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