What is GraphQL?
GraphQL is a specification that describes a declarative query language in which web and mobile clients can ask an API for the exact data they want.
GraphQL core concepts
Schema: Is the center of GraphQL implementation. It describes the functionality available to the clients which are connecting to it.
SDL: Schema Definition Language or SDL is the type system that’s used to define the schema of an API.
Query: Is an API request made by the client machine application. It supports augments and points to arrays. Query is used to read or fetch values.
Mutation: Is a way to change the dataset in GraphQL. It modifies data in the data store and returns a value. Mutations help you to insert, update, or delete data.
GraphQL vs Rest
GraphQL and Rest have several differences. Here is a list of the most important.
Characteristics of Rest:
- Fast client-side requirements are not well suited to Rest's static nature.
- Queries are made at various endpoints (URL).
- Downloading unnecessary information.
- Several endpoints (URL) must be consulted to obtain the information that is being sought.
Characteristics of GraphQL:
- Single endpoint (URL).
- GraphQL uses a strongly typed system to define the capabilities of an API.
- Schemas serve as a contract between the client and the server.
- The frontend and backend can work completely independently.