1import { Observable } from '../Observable'; 2import { OperatorFunction } from '../types'; 3/** 4 * Returns an Observable that emits whether or not every item of the source satisfies the condition specified. 5 * 6 * ## Example 7 * A simple example emitting true if all elements are less than 5, false otherwise 8 * ```ts 9 * import { of } from 'rxjs'; 10 * import { every } from 'rxjs/operators'; 11 * 12 * of(1, 2, 3, 4, 5, 6).pipe( 13 * every(x => x < 5), 14 * ) 15 * .subscribe(x => console.log(x)); // -> false 16 * ``` 17 * 18 * @param {function} predicate A function for determining if an item meets a specified condition. 19 * @param {any} [thisArg] Optional object to use for `this` in the callback. 20 * @return {Observable} An Observable of booleans that determines if all items of the source Observable meet the condition specified. 21 * @method every 22 * @owner Observable 23 */ 24export declare function every<T>(predicate: (value: T, index: number, source: Observable<T>) => boolean, thisArg?: any): OperatorFunction<T, boolean>; 25