Directives are used by the GraphQL runtime as a way of modifying execution behavior. Type system creators will usually not create these directly.

Enum Type Definition

Input Object Type Definition

Interface Type Definition

Object Type Definition

Scalar Type Definition

Schema Definition

Union Type Definition

Constant string used for default reason for a deprecation.

Used to declare element of a GraphQL schema as deprecated.

Used to conditionally include fields or fragments.

Used to conditionally skip (exclude) fields or fragments.

Note that these are GraphQLField and not GraphQLFieldConfig, so the format for args is different.

The full list of specified directives.

Utility function which asserts a schema is valid by throwing an error if it is invalid.

List Type Wrapper

Non-Null Type Wrapper

These types may describe the parent context of a selection set.

These types may describe the parent context of a selection set.

Test if the given value is a GraphQL directive.

These types may be used as input types for arguments and directives.

These types may describe types which may be leaf values.

These named types do not include modifiers like List or NonNull.

These types can all accept null as a value.

These types may be used as output types as the result of fields.

There are predicates for each kind of GraphQL type.

Test if the given value is a GraphQL schema.

These types wrap and modify other types

Implements the "Type Validation" sub-sections of the specification's "Type System" section.