prepare for trusted types

[akosyakov]

It allows to create DOM XSS free web-sites, see for more info:

• https://web.dev/trusted-types/
• Trusted Types compatibility: Make VSCode TrustedTypes compliant microsoft/vscode#103699 (comment)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.