The most valuable docs for me are rest Api contracts stored in confluence.  Easy to collaborate on.  Also, getting started guides in confluence for new hires, and architectural diagrams again in confluence for cross team collaboration &#x2F; understanding &#x2F; discussion.<p>As for code, auto generated docs from jsdoc etc. headers are fine but I never use them honestly.  I find unit tests to be the ultimate documentation in terms of code level docs.