@zendesk/laika
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Test, mock, intercept and modify Apollo Client's operations — in both browser and unit tests!
47 lines • 2.05 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.createLazyLoadableLink = void 0;
const core_1 = require("@apollo/client/core");
/**
* Creates a lazy-loadable Apollo Link.
* Useful when you want to use a given Apollo Link in a production environment conditionally,
* i.e. only load it when necessary.
* @param linkPromise A Promise to an Apollo Link to wrap.
*/
const createLazyLoadableLink = (linkPromise) => new core_1.ApolloLink((operation, forward) => new core_1.Observable((observer) => {
let innerSubscription;
let disposed = false;
void linkPromise.then((link) => {
var _a;
if (disposed)
return;
const actualLinkObservable = link === null || link === void 0 ? void 0 : link.request(operation, forward);
if (!actualLinkObservable) {
(_a = observer.error) === null || _a === void 0 ? void 0 : _a.call(observer, new Error(`LazyLoadableLink: Incorrect linkPromise provided or it's request function returned null`));
return;
}
innerSubscription = actualLinkObservable.subscribe({
next: (result) => {
var _a;
(_a = observer.next) === null || _a === void 0 ? void 0 : _a.call(observer, result);
},
error: (error) => {
var _a;
(_a = observer.error) === null || _a === void 0 ? void 0 : _a.call(observer, error);
},
complete: () => {
var _a;
(_a = observer.complete) === null || _a === void 0 ? void 0 : _a.call(observer);
},
});
}, (error) => {
var _a;
(_a = observer.error) === null || _a === void 0 ? void 0 : _a.call(observer, error);
});
return () => {
disposed = true;
innerSubscription === null || innerSubscription === void 0 ? void 0 : innerSubscription.unsubscribe();
};
}));
exports.createLazyLoadableLink = createLazyLoadableLink;
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