Convert native types

transform.js

const jsonld = require('jsonld');

const input = {
  "@context": {
    "@vocab": "http://vocab.example/"
  },
  "age": {
    "@value": "27",
    "@type": "http://www.w3.org/2001/XMLSchema#integer"
  }
};

(async () => {
  const rdf = await jsonld.toRDF(input);
  const json = await jsonld.fromRDF(rdf, {useNativeTypes: true});
  const compacted = await jsonld.compact(json, input['@context']);
  console.log(JSON.stringify(compacted, null, 2));
})();

const frame = {
  "@context": input["@context"]
};

(async () => {
  const rdf = await jsonld.toRDF(input);
  const json = await jsonld.fromRDF(rdf, {useNativeTypes: true});
  const framed = await jsonld.frame(json, frame);
  // once jsonld.js is updated to 1.1 this step can be skipped
  const output = {
    "@context": framed["@context"],
    ...framed["@graph"][0]
  };
  console.log(JSON.stringify(output, null, 2));
})();