update

node_modules/rxjs/operator/every.d.ts

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+import { Observable } from '../Observable';
+/**
+ * Returns an Observable that emits whether or not every item of the source satisfies the condition specified.
+ *
+ * @example <caption>A simple example emitting true if all elements are less than 5, false otherwise</caption>
+ *  Observable.of(1, 2, 3, 4, 5, 6)
+ *     .every(x => x < 5)
+ *     .subscribe(x => console.log(x)); // -> false
+ *
+ * @param {function} predicate A function for determining if an item meets a specified condition.
+ * @param {any} [thisArg] Optional object to use for `this` in the callback.
+ * @return {Observable} An Observable of booleans that determines if all items of the source Observable meet the condition specified.
+ * @method every
+ * @owner Observable
+ */
+export declare function every<T>(this: Observable<T>, predicate: (value: T, index: number, source: Observable<T>) => boolean, thisArg?: any): Observable<boolean>;