GraphQL Dynamic Object.

dynamicObject.js

const {GraphQLError} = require("graphql/error");
const {Kind} = require("graphql/language");
const g = require("graphql");

function parseLiteral(ast) {
  switch (ast.kind) {
  case Kind.STRING:
  case Kind.BOOLEAN:
    return ast.value;
  case Kind.INT:
  case Kind.FLOAT:
    return parseFloat(ast.value);
  case Kind.OBJECT: {
    const value = Object.create(null);
    ast.fields.forEach((field) => {
      value[field.name.value] = parseLiteral(field.value);
    });

    return value;
  }
  case Kind.LIST:
    return ast.values.map(parseLiteral);
  default:
    return null;
  }
}

module.exports = new g.GraphQLScalarType({
  name: "DynamicObject",
  description: "A dynamic object.",
  serialize(v) {
    return v;
  },
  parseValue(v) {
    return v;
  },
  parseLiteral(ast) {
    return parseLiteral(ast);
  }
});