Comparison with alternatives

jq

Emuto was designed to be a replacement for jq in some situations where it cannot be used.

Emuto's syntax is heavily inspired by jq, and should be easy to learn for anyone who has experience with jq.

In general, jq is much more mature than emuto. There are no benchmarks yet, but jq can be expected to be superior in performance.

	emuto	jq
created	2018	2012
written in	JavaScript	C
Compile to JS	✓
Runs in the browser	✓	only with emscripten
Runs in the command line	✓	✓
Dependencies	node or browser
ES6-inspired syntax	✓
GraphQL-inspired syntax	✓

GraphQL

GraphQL and Emuto are designed for different domains. GraphQL is designed as a query language, while Emuto is designed for manipulating/processing JSON files.

That being said, there is some overlap between what can be achieved with the two technologies, and some of the syntax is similar.

In particular, Emuto's object projections might look familiar if you've used GraphQL before:

$ {
  line {
    from {
      ...Point
    }

    to {
      ...Point
    }
  }
}

where
  $Point = ($ => ${
    X
    Y
  })