Use export type for re-exporting type definitions

Fixes compilation under typescript with `isolatedModules: true`

See https://devblogs.microsoft.com/typescript/announcing-typescript-3-8/#type-only-imports-exports

spec/ajax/index-spec.ts

@@ -7,10 +7,10 @@ describe('index', () => {
   });
 
   it('should export Ajax data classes', () => {
-    expect(index.AjaxResponse).to.exist;
     expect(index.AjaxError).to.exist;
     expect(index.AjaxTimeoutError).to.exist;
     // Interfaces can be checked by creating a variable of that type
     let ajaxRequest: index.AjaxRequest;
+    let ajaxResponse: index.AjaxResponse;
   });
 });

src/ajax/index.ts

@@ -1,4 +1,4 @@
 export { ajax } from '../internal/ajax/ajax';
 export { AjaxError, AjaxTimeoutError } from '../internal/ajax/errors';
 export { AjaxResponse } from '../internal/ajax/AjaxResponse';
-export { AjaxRequest, AjaxConfig, AjaxDirection } from '../internal/ajax/types';
+export type { AjaxRequest, AjaxConfig, AjaxDirection } from '../internal/ajax/types';

src/index.ts

@@ -15,8 +15,8 @@
 /* Observable */
 export { Observable } from './internal/Observable';
 export { ConnectableObservable } from './internal/observable/ConnectableObservable';
-export { GroupedObservable } from './internal/operators/groupBy';
-export { Operator } from './internal/Operator';
+export type { GroupedObservable } from './internal/operators/groupBy';
+export type { Operator } from './internal/Operator';
 export { observable } from './internal/symbol/observable';
 export { animationFrames } from './internal/observable/dom/animationFrames';
 
@@ -97,7 +97,8 @@ export { NEVER } from './internal/observable/never';
 export * from './internal/types';
 
 /* Config */
-export { config, GlobalConfig } from './internal/config';
+export { config } from './internal/config';
+export type { GlobalConfig } from './internal/config';
 
 /* Operators */
 export { audit } from './internal/operators/audit';
@@ -115,7 +116,8 @@ export { concatAll } from './internal/operators/concatAll';
 export { concatMap } from './internal/operators/concatMap';
 export { concatMapTo } from './internal/operators/concatMapTo';
 export { concatWith } from './internal/operators/concatWith';
-export { connect, ConnectConfig } from './internal/operators/connect';
+export { connect } from './internal/operators/connect';
+export type { ConnectConfig } from './internal/operators/connect';
 export { count } from './internal/operators/count';
 export { debounce } from './internal/operators/debounce';
 export { debounceTime } from './internal/operators/debounceTime';
@@ -138,7 +140,8 @@ export { finalize } from './internal/operators/finalize';
 export { find } from './internal/operators/find';
 export { findIndex } from './internal/operators/findIndex';
 export { first } from './internal/operators/first';
-export { groupBy, BasicGroupByOptions, GroupByOptionsWithElement } from './internal/operators/groupBy';
+export { groupBy } from './internal/operators/groupBy';
+export type { BasicGroupByOptions, GroupByOptionsWithElement } from './internal/operators/groupBy';
 export { ignoreElements } from './internal/operators/ignoreElements';
 export { isEmpty } from './internal/operators/isEmpty';
 export { last } from './internal/operators/last';
@@ -165,15 +168,18 @@ export { raceWith } from './internal/operators/raceWith';
 export { reduce } from './internal/operators/reduce';
 export { repeat } from './internal/operators/repeat';
 export { repeatWhen } from './internal/operators/repeatWhen';
-export { retry, RetryConfig } from './internal/operators/retry';
+export { retry } from './internal/operators/retry';
+export type { RetryConfig } from './internal/operators/retry';
 export { retryWhen } from './internal/operators/retryWhen';
 export { refCount } from './internal/operators/refCount';
 export { sample } from './internal/operators/sample';
 export { sampleTime } from './internal/operators/sampleTime';
 export { scan } from './internal/operators/scan';
 export { sequenceEqual } from './internal/operators/sequenceEqual';
-export { share, ShareConfig } from './internal/operators/share';
-export { shareReplay, ShareReplayConfig } from './internal/operators/shareReplay';
+export { share } from './internal/operators/share';
+export type { ShareConfig } from './internal/operators/share';
+export { shareReplay } from './internal/operators/shareReplay';
+export type { ShareReplayConfig } from './internal/operators/shareReplay';
 export { single } from './internal/operators/single';
 export { skip } from './internal/operators/skip';
 export { skipLast } from './internal/operators/skipLast';
@@ -190,11 +196,13 @@ export { takeLast } from './internal/operators/takeLast';
 export { takeUntil } from './internal/operators/takeUntil';
 export { takeWhile } from './internal/operators/takeWhile';
 export { tap } from './internal/operators/tap';
-export { throttle, ThrottleConfig } from './internal/operators/throttle';
+export { throttle } from './internal/operators/throttle';
+export type { ThrottleConfig } from './internal/operators/throttle';
 export { throttleTime } from './internal/operators/throttleTime';
 export { throwIfEmpty } from './internal/operators/throwIfEmpty';
 export { timeInterval } from './internal/operators/timeInterval';
-export { timeout, TimeoutConfig, TimeoutInfo } from './internal/operators/timeout';
+export { timeout } from './internal/operators/timeout';
+export type { TimeoutConfig, TimeoutInfo } from './internal/operators/timeout';
 export { timeoutWith } from './internal/operators/timeoutWith';
 export { timestamp } from './internal/operators/timestamp';
 export { toArray } from './internal/operators/toArray';

src/operators/index.ts

@@ -16,7 +16,8 @@ export { concatAll } from '../internal/operators/concatAll';
 export { concatMap } from '../internal/operators/concatMap';
 export { concatMapTo } from '../internal/operators/concatMapTo';
 export { concatWith } from '../internal/operators/concatWith';
-export { connect, ConnectConfig } from '../internal/operators/connect';
+export { connect } from '../internal/operators/connect';
+export type { ConnectConfig } from '../internal/operators/connect';
 export { count } from '../internal/operators/count';
 export { debounce } from '../internal/operators/debounce';
 export { debounceTime } from '../internal/operators/debounceTime';
@@ -39,7 +40,8 @@ export { finalize } from '../internal/operators/finalize';
 export { find } from '../internal/operators/find';
 export { findIndex } from '../internal/operators/findIndex';
 export { first } from '../internal/operators/first';
-export { groupBy, BasicGroupByOptions, GroupByOptionsWithElement } from '../internal/operators/groupBy';
+export { groupBy } from '../internal/operators/groupBy';
+export type { BasicGroupByOptions, GroupByOptionsWithElement } from '../internal/operators/groupBy';
 export { ignoreElements } from '../internal/operators/ignoreElements';
 export { isEmpty } from '../internal/operators/isEmpty';
 export { last } from '../internal/operators/last';
@@ -70,15 +72,18 @@ export { raceWith } from '../internal/operators/raceWith';
 export { reduce } from '../internal/operators/reduce';
 export { repeat } from '../internal/operators/repeat';
 export { repeatWhen } from '../internal/operators/repeatWhen';
-export { retry, RetryConfig } from '../internal/operators/retry';
+export { retry } from '../internal/operators/retry';
+export type { RetryConfig } from '../internal/operators/retry';
 export { retryWhen } from '../internal/operators/retryWhen';
 export { refCount } from '../internal/operators/refCount';
 export { sample } from '../internal/operators/sample';
 export { sampleTime } from '../internal/operators/sampleTime';
 export { scan } from '../internal/operators/scan';
 export { sequenceEqual } from '../internal/operators/sequenceEqual';
-export { share, ShareConfig } from '../internal/operators/share';
-export { shareReplay, ShareReplayConfig } from '../internal/operators/shareReplay';
+export { share } from '../internal/operators/share';
+export type { ShareConfig } from '../internal/operators/share';
+export { shareReplay } from '../internal/operators/shareReplay';
+export type { ShareReplayConfig } from '../internal/operators/shareReplay';
 export { single } from '../internal/operators/single';
 export { skip } from '../internal/operators/skip';
 export { skipLast } from '../internal/operators/skipLast';
@@ -95,11 +100,13 @@ export { takeLast } from '../internal/operators/takeLast';
 export { takeUntil } from '../internal/operators/takeUntil';
 export { takeWhile } from '../internal/operators/takeWhile';
 export { tap } from '../internal/operators/tap';
-export { throttle, ThrottleConfig } from '../internal/operators/throttle';
+export { throttle } from '../internal/operators/throttle';
+export type { ThrottleConfig } from '../internal/operators/throttle';
 export { throttleTime } from '../internal/operators/throttleTime';
 export { throwIfEmpty } from '../internal/operators/throwIfEmpty';
 export { timeInterval } from '../internal/operators/timeInterval';
-export { timeout, TimeoutConfig, TimeoutInfo } from '../internal/operators/timeout';
+export { timeout } from '../internal/operators/timeout';
+export type { TimeoutConfig, TimeoutInfo } from '../internal/operators/timeout';
 export { timeoutWith } from '../internal/operators/timeoutWith';
 export { timestamp } from '../internal/operators/timestamp';
 export { toArray } from '../internal/operators/toArray';

src/testing/index.ts

@@ -1 +1,2 @@
-export { TestScheduler, RunHelpers } from '../internal/testing/TestScheduler';
+export { TestScheduler } from '../internal/testing/TestScheduler';
+export type { RunHelpers } from '../internal/testing/TestScheduler';

src/webSocket/index.ts

@@ -1,2 +1,3 @@
 export { webSocket as webSocket } from '../internal/observable/dom/webSocket';
-export { WebSocketSubject, WebSocketSubjectConfig } from '../internal/observable/dom/WebSocketSubject';
+export { WebSocketSubject } from '../internal/observable/dom/WebSocketSubject';
+export type { WebSocketSubjectConfig } from '../internal/observable/dom/WebSocketSubject';