hugoWebsite/node_modules/rxjs/dist/esm5/internal/operators/defaultIfEmpty.js

17 lines
594 B
JavaScript

import { operate } from '../util/lift';
import { createOperatorSubscriber } from './OperatorSubscriber';
export function defaultIfEmpty(defaultValue) {
return operate(function (source, subscriber) {
var hasValue = false;
source.subscribe(createOperatorSubscriber(subscriber, function (value) {
hasValue = true;
subscriber.next(value);
}, function () {
if (!hasValue) {
subscriber.next(defaultValue);
}
subscriber.complete();
}));
});
}
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