Returns an Observable that emits whether or not every item of the source satisfies the condition specified.

every<T>(predicate: (value: T, index: number, source: Observable<T>) => boolean, thisArg?: any): OperatorFunction<T, boolean>

Parameters

predicate	A function for determining if an item meets a specified condition.
thisArg	Optional. Default is undefined. Optional object to use for this in the callback.

Returns

OperatorFunction<T, boolean>: An Observable of booleans that determines if all items of the source Observable meet the condition specified.

Description

Example

A simple example emitting true if all elements are less than 5, false otherwise

import { of } from 'rxjs';
import { every } from 'rxjs/operators';

 of(1, 2, 3, 4, 5, 6).pipe(
    every(x => x < 5),
)
.subscribe(x => console.log(x)); // -> false