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- import { OperatorFunction } from '../types';
- import { map } from './map';
- /** @deprecated To be removed in v9. Use {@link map} instead: `map(() => value)`. */
- export function mapTo<R>(value: R): OperatorFunction<unknown, R>;
- /**
- * @deprecated Do not specify explicit type parameters. Signatures with type parameters
- * that cannot be inferred will be removed in v8. `mapTo` itself will be removed in v9,
- * use {@link map} instead: `map(() => value)`.
- * */
- export function mapTo<T, R>(value: R): OperatorFunction<T, R>;
- /**
- * Emits the given constant value on the output Observable every time the source
- * Observable emits a value.
- *
- * <span class="informal">Like {@link map}, but it maps every source value to
- * the same output value every time.</span>
- *
- * 
- *
- * Takes a constant `value` as argument, and emits that whenever the source
- * Observable emits a value. In other words, ignores the actual source value,
- * and simply uses the emission moment to know when to emit the given `value`.
- *
- * ## Example
- *
- * Map every click to the string `'Hi'`
- *
- * ```ts
- * import { fromEvent, mapTo } from 'rxjs';
- *
- * const clicks = fromEvent(document, 'click');
- * const greetings = clicks.pipe(mapTo('Hi'));
- *
- * greetings.subscribe(x => console.log(x));
- * ```
- *
- * @see {@link map}
- *
- * @param value The value to map each source value to.
- * @return A function that returns an Observable that emits the given `value`
- * every time the source Observable emits.
- * @deprecated To be removed in v9. Use {@link map} instead: `map(() => value)`.
- */
- export function mapTo<R>(value: R): OperatorFunction<unknown, R> {
- return map(() => value);
- }
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