Introduction to GraphQL

July 18, 2022

Schema:

• Schema is broken up into query types and mutation types (these are treated at the endpoints).

Types:

• Types make up everything. Query types and mutation types are at the outer level, with nested types being possible. Types are made up of fields that are strongly typed. Non-required fields are prefixed with an exclamation point (!).

Resolvers:

• Resolvers handle all logic. They must not contain side effects, child selections must wait for parent selections to return and all of this may be done in parallel.