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node_modules/rxjs/_esm2015/observable/NeverObservable.js

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+import { Observable } from '../Observable';
+import { noop } from '../util/noop';
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @extends {Ignored}
+ * @hide true
+ */
+export class NeverObservable extends Observable {
+    constructor() {
+        super();
+    }
+    /**
+     * Creates an Observable that emits no items to the Observer.
+     *
+     * <span class="informal">An Observable that never emits anything.</span>
+     *
+     * <img src="./img/never.png" width="100%">
+     *
+     * This static operator is useful for creating a simple Observable that emits
+     * neither values nor errors nor the completion notification. It can be used
+     * for testing purposes or for composing with other Observables. Please note
+     * that by never emitting a complete notification, this Observable keeps the
+     * subscription from being disposed automatically. Subscriptions need to be
+     * manually disposed.
+     *
+     * @example <caption>Emit the number 7, then never emit anything else (not even complete).</caption>
+     * function info() {
+     *   console.log('Will not be called');
+     * }
+     * var result = Rx.Observable.never().startWith(7);
+     * result.subscribe(x => console.log(x), info, info);
+     *
+     * @see {@link create}
+     * @see {@link empty}
+     * @see {@link of}
+     * @see {@link throw}
+     *
+     * @return {Observable} A "never" Observable: never emits anything.
+     * @static true
+     * @name never
+     * @owner Observable
+     */
+    static create() {
+        return new NeverObservable();
+    }
+    /** @deprecated internal use only */ _subscribe(subscriber) {
+        noop();
+    }
+}
+//# sourceMappingURL=NeverObservable.js.map