@graphql-yoga/apollo-link/esm/index.js

import * as apolloImport from '@apollo/client';
import { SubscriptionProtocol, UrlLoader, } from '@graphql-tools/url-loader';
import { isAsyncIterable } from '@graphql-tools/utils';
const apollo = apolloImport?.default ?? apolloImport;
function createYogaApolloRequestHandler(options) {
    const urlLoader = new UrlLoader();
    const executor = urlLoader.getExecutorAsync(options.endpoint, {
        subscriptionsProtocol: SubscriptionProtocol.SSE,
        multipart: true,
        ...options,
    });
    return function graphQLYogaApolloRequestHandler(operation) {
        return new apollo.Observable((observer) => {
            const executionRequest = {
                document: operation.query,
                variables: operation.variables,
                operationName: operation.operationName,
                extensions: operation.extensions,
                context: operation.getContext(),
            };
            executor(executionRequest)
                .then(async (results) => {
                if (isAsyncIterable(results)) {
                    for await (const result of results) {
                        if (observer.closed) {
                            return;
                        }
                        observer.next(result);
                    }
                    observer.complete();
                }
                else if (!observer.closed) {
                    observer.next(results);
                    observer.complete();
                }
            })
                .catch((error) => {
                if (!observer.closed) {
                    observer.error(error);
                }
            });
        });
    };
}
export class YogaLink extends apollo.ApolloLink {
    constructor(options) {
        super(createYogaApolloRequestHandler(options));
    }
}