An alternative approach is to use XPath-inspired DSLs that work on JS or JSON object structures. These tend to work on strings, rather than declarative query ob

An alternative approach is to use XPath-inspired DSLs that work on JS or JSON object structures. These tend to work on strings, rather than declarative query objects. Examples: JSPath: https://github.com/dfilatov/jspath https://github.com/dfilatov/jspath JSONPath: https://github.com/s3u/JSONPath https://github.com/s3u/JSONPath (Since you don't have type safety in JS, I don't think you lose much by using strings, unless you want to wrap it in TypeScript.)