graphql 15.8.0

GraphQL is a query language and runtime for APIs, offering a more efficient alternative to REST. It was originally designed by Facebook and is now maintained as an open-source project. It allows you to ask for specific data, letting the server know exactly what you need, which can lead to fewer bytes over the network and faster loading times. GraphQL can target any service, providing you with an incredible amount of flexibility when it comes to fetching and interacting with data.

To begin using GraphQL, first, you will need to add the package to your JavaScript project. You can do this using npm or yarn:

With npm:

npm install --save graphql

or using Yarn:

yarn add graphql

Once installed, you can then import GraphQL into your file and define a schema using the provided classes. This schema can then map to your codebase:

import {
  graphql,
  GraphQLSchema,
  GraphQLObjectType,
  GraphQLString,
} from 'graphql';

var schema = new GraphQLSchema({
  query: new GraphQLObjectType({
    name: 'RootQueryType',
    fields: {
      hello: {
        type: GraphQLString,
        resolve() {
          return 'world';
        },
      },
    },
  }),
});

With your schema defined, you can then serve the result of a query against that schema:

var source = '{ hello }';

graphql({ schema, source }).then((result) => {
  console.log(result);
});

This will return a Promise that resolves to an object, which will contain the data requested if the query is valid. In case of an invalid query, it will print the corresponding error(s).

If you want to use the latest not-yet-released version of graphql-js, you can do so by depending directly on the npm branch of the repository:

npm install graphql@git://github.com/graphql/graphql-js.git#npm

The comprehensive documentation for GraphQL, including its JavaScript implementation, can be found at https://graphql.org/ and https://graphql.org/graphql-js/. The documentation provides a detailed analysis of GraphQL as well as a multitude of examples, helping developers understand and utilize the power of GraphQL effectively.