What is @aws-amplify/api-graphql?
@aws-amplify/api-graphql is a package that allows developers to interact with GraphQL APIs in a seamless manner. It is part of the AWS Amplify framework, which provides a set of tools and services to build secure, scalable mobile and web applications. This package specifically focuses on enabling GraphQL operations such as queries, mutations, and subscriptions.
What are @aws-amplify/api-graphql's main functionalities?
GraphQL Queries
This feature allows you to perform GraphQL queries to fetch data from your API. The code sample demonstrates how to define a query to list todos and execute it using the API.graphql method.
const query = `query ListTodos { listTodos { items { id name description } } }`;
API.graphql(graphqlOperation(query)).then(response => {
console.log(response.data.listTodos.items);
});
GraphQL Mutations
This feature allows you to perform GraphQL mutations to modify data in your API. The code sample shows how to define a mutation to create a new todo item and execute it using the API.graphql method.
const mutation = `mutation CreateTodo { createTodo(input: { name: "New Todo", description: "This is a new todo" }) { id name description } }`;
API.graphql(graphqlOperation(mutation)).then(response => {
console.log(response.data.createTodo);
});
GraphQL Subscriptions
This feature allows you to subscribe to real-time updates from your GraphQL API. The code sample demonstrates how to define a subscription to listen for new todo items being created and handle the incoming data.
const subscription = `subscription OnCreateTodo { onCreateTodo { id name description } }`;
const subscriptionClient = API.graphql(graphqlOperation(subscription)).subscribe({
next: (response) => {
console.log(response.value.data.onCreateTodo);
}
});
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