@dillonkearns/elm-graphql
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16 lines (11 loc) • 407 B
Flow
// @flow
import type {DocumentNode} from "./types";
const isSubscription = definition =>
definition.kind === "OperationDefinition" &&
definition.operation === "subscription";
/**
* Returns true if documentNode has a subscription or false otherwise
*/
const hasSubscription = (documentNode: DocumentNode): boolean =>
documentNode.definitions.some(isSubscription);
export default hasSubscription;