I needed to organize my thoughts on Frontend so I've ended up with a mindmap that I've ambitiously named as Frontend 360. The system can help you to evaluate the state of the projects and point to the strengths and weaknesses.
Mindmap can be categorized into 3 subcategories - Peers, Self and Users
Frontend cannot live in the vacuum itself. As a touchpoint with the customers, it has interdependencies with other domains. The Peers category relates to the domains relative to the Frontend - Testing, DevOps, Backend, Design, Content, Marketing
The second section relates to ourselves, Frontend code maintainers with covering following domains - Code, Documentation, Monitoring
The last, but not least - Frontend from user's perspective - Accessibility, Performance, Security
These questions and sections can build a good picture of the state of Frontend
All these aspects are important to keep a healthy project that will bring the joy to work with for you, your peers and your users.