validate

Implements the "Validation" section of the spec.

Validation runs synchronously, returning an array of encountered errors, or an empty array if no errors were encountered and the document is valid.

A list of specific validation rules may be provided. If not provided, the default list of rules defined by the GraphQL specification will be used.

Each validation rules is a function which returns a visitor (see the language/visitor API). Visitor methods are expected to return GraphQLErrors, or Arrays of GraphQLErrors when invalid.

Validate will stop validation after a maxErrors limit has been reached. Attackers can send pathologically invalid queries to induce a DoS attack, so by default maxErrors set to 100 errors.

Optionally a custom TypeInfo instance may be provided. If not provided, one will be created from the provided schema.

function validate(

schema: GraphQLSchema,

documentAST: DocumentNode,

rules?: ReadonlyArray<ValidationRule>,

options?: {

maxErrors?: number;

typeInfo?: TypeInfo,

): ReadonlyArray<GraphQLError>;