Quick Answer: What Is GraphQL Subscription?

What is GraphQL and why use it?

In a nutshell, GraphQL is a syntax that describes how to ask for data, and is generally used to load data from a server to a client.

It lets the client specify exactly what data it needs.

It makes it easier to aggregate data from multiple sources.

It uses a type system to describe data..

Why is GraphQL bad?

GraphQL is famously bad at caching, mostly because the alternatives (REST and Falcor) make caching at all levels so easy and efficient. GraphQL is bad at sending anything other than text back and forth (such as file uploads) while REST APIs can do literally anything.

What is a GraphQL client?

What is a GraphQL Client? if you boil it down to the basics, a GraphQL client is code that makes a POST request to a GraphQL Server. In the body of the request we send a GraphQL query or mutation as well as some variables and we expect to get some JSON back.

What are the benefits of GraphQL?

GraphQL advantagesGood fit for complex systems and microservices. … Fetching data with a single API call. … No over- and under-fetching problems. … Tailoring requests to your needs. … Validation and type checking out-of-the-box. … Autogenerating API documentation. … API evolution without versioning. … Code-sharing.More items…•

Is GraphQL frontend or backend?

GraphQL allows front-end developers to query and mutate the data without having to make requests for custom endpoints to back-end developers. Minimize the need for having backend developers perform low-value work.

Is GraphQL worth using?

GraphQL is great, it allows you to work in a declarative style by enabling you to select only the information or operations that you need. However, just like any other tool, it’s not a silver bullet. … GraphQL will make some tasks more complex. It’s easier to use a web cache with REST than with GraphQL.

Is GraphQL JSON?

GraphQL defines a standard grammar for a query language to read/write data. It kind of looks like a neater JSON with just the keys and allows you to pass arbitrary parameters in the query.

Is GraphQL an API?

GraphQL is a query language and server-side runtime for application programming interfaces (APIs) that prioritizes giving clients exactly the data they request and no more. GraphQL is designed to make APIs fast, flexible, and developer-friendly.

Is GraphQL real time?

Any GraphQL system has to have native real-time API capabilities.

Do GraphQL subscriptions use WebSockets?

Subscriptions are a GraphQL feature allowing the server to send data to its clients when a specific event happens. Subscriptions are usually implemented with WebSockets, where the server holds a steady connection to the client.

Is GraphQL faster than rest?

GraphQL vs REST comparison GraphQL solves both over-fetching and under-fetching issues by allowing the client to request only the needed data; Since the client now has more freedom in the fetched data, development is much faster with GraphQL than what it would be with REST.

Is GraphQL a REST API?

GraphQL follows the same set of constraints as REST APIs, but it organizes data into a graph using one interface. Objects are represented by nodes (defined using the GraphQL schema), and the relationship between nodes is represented by edges in the graph.

Is GraphQL easy to learn?

A well-designed API is very easy to use and learn. It’s also intuitive, a good point to keep in mind when you’re starting to design your API. To solve these problems, Facebook created GraphQL. … Since GraphQL is open-source, its community has grown huge.

How do I use GraphQL subscriptions?

Realtime GraphQL SubscriptionsSubscriptions are a GraphQL feature that allows a server to send data to its clients when a specific event happens. … Instead, the client initially opens up a long-lived connection to the server by sending a subscription query that specifies which event it is interested in.More items…

What is Hasura GraphQL?

The Hasura GraphQL Engine is an extremely lightweight, high performance product that gives you instant realtime GraphQL APIs on a Postgres database. … The Hasura Console lets you create and view tables in your Postgres database and query them using the embedded GraphiQL interface.