Separate out all type-only imports

src/main-thread/configuration.ts

@@ -14,9 +14,10 @@
  * limitations under the License.
  */
 
-import { MessageFromWorker, MessageToWorker } from '../transfer/Messages';
-import { Phase } from '../transfer/Phase';
-import { HydrateableNode } from '../transfer/TransferrableNodes';
+import type { MessageFromWorker, MessageToWorker } from '../transfer/Messages';
+import type { Phase } from '../transfer/Phase';
+import type { HydrateableNode } from '../transfer/TransferrableNodes';
+
 import { DefaultAllowedMutations } from '../transfer/TransferrableMutation';
 
 /**

src/main-thread/debugging.ts

@@ -22,22 +22,18 @@
  * @see https://github.com/Microsoft/TypeScript/blob/master/doc/spec.md#9.4
  */
 
-import {
-  EventToWorker,
-  MessageType,
-  MessageToWorker,
-  ValueSyncToWorker,
-  BoundingClientRectToWorker,
-  StorageValueToWorker,
-} from '../transfer/Messages';
-import { HydrateableNode, TransferredNode, TransferrableNodeIndex } from '../transfer/TransferrableNodes';
-import { NodeContext } from './nodes';
-import { TransferrableEvent } from '../transfer/TransferrableEvent';
+import type { EventToWorker, MessageToWorker, ValueSyncToWorker, BoundingClientRectToWorker, StorageValueToWorker } from '../transfer/Messages';
+import type { HydrateableNode, TransferredNode } from '../transfer/TransferrableNodes';
+import type { NodeContext } from './nodes';
+import type { TransferrableEvent } from '../transfer/TransferrableEvent';
+import type { TransferrableSyncValue } from '../transfer/TransferrableSyncValue';
+import type { WorkerContext } from './worker';
+
+import { MessageType } from '../transfer/Messages';
+import { TransferrableNodeIndex } from '../transfer/TransferrableNodes';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
-import { TransferrableSyncValue } from '../transfer/TransferrableSyncValue';
 import { createReadableHydrateableRootNode } from './serialize';
 import { WorkerDOMConfiguration } from './configuration';
-import { WorkerContext } from './worker';
 
 /**
  * @param element

src/main-thread/deserializeTransferrableObject.ts

@@ -14,10 +14,11 @@
  * limitations under the License.
  */
 
-import { StringContext } from './strings';
+import type { StringContext } from './strings';
+import type { NodeContext } from './nodes';
+import type { ObjectContext } from './object-context';
+
 import { TransferrableObjectType } from '../transfer/TransferrableMutation';
-import { NodeContext } from './nodes';
-import { ObjectContext } from './object-context';
 
 interface DeserializedArgs {
   args: unknown[];

src/main-thread/exported-worker.ts

@@ -14,10 +14,12 @@
  * limitations under the License.
  */
 
-import { WorkerContext } from './worker';
-import { WorkerDOMConfiguration } from './configuration';
+import type { WorkerContext } from './worker';
+import type { WorkerDOMConfiguration } from './configuration';
+import type { FunctionCallToWorker } from '../transfer/Messages';
+
 import { registerPromise } from './commands/function';
-import { FunctionCallToWorker, MessageType } from '../transfer/Messages';
+import { MessageType } from '../transfer/Messages';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
 import { TransferrableMutationType } from '../transfer/TransferrableMutation';
 

src/main-thread/index.amp.ts

@@ -18,10 +18,11 @@
  * @fileoverview This entry point API in active development and unstable.
  */
 
+import type { ExportedWorker } from './exported-worker';
+import type { WorkerDOMConfiguration, LongTaskFunction } from './configuration';
+
 import { fetchAndInstall, install } from './install';
-import { WorkerDOMConfiguration, LongTaskFunction } from './configuration';
 import { toLower } from '../utils';
-import { ExportedWorker } from './exported-worker';
 
 /**
  * AMP Element Children need to be filtered from Hydration, to avoid Author Code from manipulating it.

src/main-thread/index.ts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
+import type { ExportedWorker } from './exported-worker';
 import { fetchAndInstall } from './install';
-import { ExportedWorker } from './exported-worker';
 
 export function upgradeElement(baseElement: Element, domURL: string): Promise<ExportedWorker | null> {
   const authorURL = baseElement.getAttribute('src');

src/main-thread/install.ts

@@ -14,12 +14,15 @@
  * limitations under the License.
  */
 
-import { MutationFromWorker, MessageType, MessageFromWorker } from '../transfer/Messages';
+import type { MutationFromWorker, MessageFromWorker } from '../transfer/Messages';
+import type { InboundWorkerDOMConfiguration } from './configuration';
+
+import { MessageType } from '../transfer/Messages';
 import { MutatorProcessor } from './mutator';
 import { NodeContext } from './nodes';
 import { StringContext } from './strings';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
-import { InboundWorkerDOMConfiguration, normalizeConfiguration } from './configuration';
+import { normalizeConfiguration } from './configuration';
 import { WorkerContext } from './worker';
 import { ObjectContext } from './object-context';
 import { ExportedWorker } from './exported-worker';

src/main-thread/mutator.ts

@@ -14,9 +14,14 @@
  * limitations under the License.
  */
 
-import { NodeContext } from './nodes';
-import { StringContext } from './strings';
-import { WorkerContext } from './worker';
+import type { NodeContext } from './nodes';
+import type { StringContext } from './strings';
+import type { WorkerContext } from './worker';
+import type { WorkerDOMConfiguration, MutationPumpFunction } from './configuration';
+import type { CommandExecutor } from './commands/interface';
+import type { Phase } from '../transfer/Phase';
+import type { ObjectContext } from './object-context';
+
 import { OffscreenCanvasProcessor } from './commands/offscreen-canvas';
 import { TransferrableMutationType, ReadableMutationType, isUserVisibleMutation } from '../transfer/TransferrableMutation';
 import { EventSubscriptionProcessor } from './commands/event-subscription';
@@ -26,12 +31,8 @@ import { AttributeProcessor } from './commands/attribute';
 import { CharacterDataProcessor } from './commands/character-data';
 import { PropertyProcessor } from './commands/property';
 import { LongTaskExecutor } from './commands/long-task';
-import { CommandExecutor } from './commands/interface';
-import { WorkerDOMConfiguration, MutationPumpFunction } from './configuration';
-import { Phase } from '../transfer/Phase';
 import { ObjectMutationProcessor } from './commands/object-mutation';
 import { ObjectCreationProcessor } from './commands/object-creation';
-import { ObjectContext } from './object-context';
 import { ImageBitmapProcessor } from './commands/image-bitmap';
 import { StorageProcessor } from './commands/storage';
 import { FunctionProcessor } from './commands/function';

src/main-thread/nodes.ts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
+import type { StringContext } from './strings';
 import { NodeType, TransferrableNodeIndex } from '../transfer/TransferrableNodes';
-import { StringContext } from './strings';
 
 /**
  * IE11 doesn't support NodeList.prototype.forEach

src/main-thread/serialize.ts

@@ -14,12 +14,14 @@
  * limitations under the License.
  */
 
-import { HydrateableNode, NodeType } from '../transfer/TransferrableNodes';
+import type { HydrateableNode } from '../transfer/TransferrableNodes';
+import type { WorkerDOMConfiguration, HydrationFilterPredicate } from './configuration';
+import type { WorkerContext } from './worker';
+
+import { NodeType } from '../transfer/TransferrableNodes';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
 import { NumericBoolean } from '../utils';
-import { WorkerDOMConfiguration, HydrationFilterPredicate } from './configuration';
 import { applyDefaultInputListener, sendValueChangeOnAttributeMutation } from './commands/event-subscription';
-import { WorkerContext } from './worker';
 
 const NODES_ALLOWED_TO_TRANSMIT_TEXT_CONTENT = [NodeType.COMMENT_NODE, NodeType.TEXT_NODE];
 

src/main-thread/worker.ts

@@ -14,11 +14,12 @@
  * limitations under the License.
  */
 
-import { MessageToWorker } from '../transfer/Messages';
-import { WorkerDOMConfiguration } from './configuration';
+import type { MessageToWorker } from '../transfer/Messages';
+import type { WorkerDOMConfiguration } from './configuration';
+import type { NodeContext } from './nodes';
+
 import { createHydrateableRootNode } from './serialize';
 import { readableHydrateableRootNode, readableMessageToWorker } from './debugging';
-import { NodeContext } from './nodes';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
 import { StorageLocation } from '../transfer/TransferrableStorage';
 import { IframeWorker } from './iframe-worker';

src/third_party/html-parser/html-parser.ts

@@ -1,5 +1,5 @@
-import { Element } from '../../worker-thread/dom/Element';
-import { Node } from '../../worker-thread/dom/Node';
+import type { Element } from '../../worker-thread/dom/Element';
+import type { Node } from '../../worker-thread/dom/Node';
 import { SVG_NAMESPACE, HTML_NAMESPACE } from '../../transfer/TransferrableNodes';
 import { toLower, toUpper } from '../../utils';
 

src/transfer/Messages.ts

@@ -14,13 +14,13 @@
  * limitations under the License.
  */
 
-import { TransferrableEvent } from './TransferrableEvent';
-import { TransferrableSyncValue } from './TransferrableSyncValue';
-import { TransferrableKeys } from './TransferrableKeys';
-import { HydrateableNode, TransferredNode } from './TransferrableNodes';
-import { TransferrableBoundingClientRect } from './TransferrableBoundClientRect';
-import { Phase } from './Phase';
-import { StorageLocation } from './TransferrableStorage';
+import type { TransferrableEvent } from './TransferrableEvent';
+import type { TransferrableSyncValue } from './TransferrableSyncValue';
+import type { TransferrableKeys } from './TransferrableKeys';
+import type { HydrateableNode, TransferredNode } from './TransferrableNodes';
+import type { TransferrableBoundingClientRect } from './TransferrableBoundClientRect';
+import type { Phase } from './Phase';
+import type { StorageLocation } from './TransferrableStorage';
 
 export const enum MessageType {
   // INIT = 0,

src/transfer/TransferrableEvent.ts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-import { TransferredNode } from './TransferrableNodes';
-import { TransferrableKeys } from './TransferrableKeys';
+import type { TransferredNode } from './TransferrableNodes';
+import type { TransferrableKeys } from './TransferrableKeys';
 
 interface TransferrableTouch {
   [key: number]: number;

src/transfer/TransferrableNodes.ts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-import { NumericBoolean } from '../utils';
-import { TransferrableKeys } from './TransferrableKeys';
+import type { NumericBoolean } from '../utils';
+import type { TransferrableKeys } from './TransferrableKeys';
 
 export const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
 export const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';

src/transfer/TransferrableSyncValue.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { TransferrableKeys } from './TransferrableKeys';
+import type { TransferrableKeys } from './TransferrableKeys';
 
 export interface TransferrableSyncValue {
   readonly [TransferrableKeys.index]: number;

src/worker-thread/Event.ts

@@ -19,14 +19,16 @@
  * WorkerDOM's `Event` class. `CustomEvent` is available natively in web worker.
  */
 
-import { Node } from './dom/Node';
+import type { Node } from './dom/Node';
+import type { EventToWorker } from '../transfer/Messages';
+import type { TransferrableEvent, TransferrableTouchList } from '../transfer/TransferrableEvent';
+import type { Document } from './dom/Document';
+import type { TransferredNode } from '../transfer/TransferrableNodes';
+import type { WorkerDOMGlobalScope } from './WorkerDOMGlobalScope';
+
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
-import { EventToWorker, MessageType } from '../transfer/Messages';
-import { TransferrableEvent, TransferrableTouchList } from '../transfer/TransferrableEvent';
+import { MessageType } from '../transfer/Messages';
 import { get } from './nodes';
-import { Document } from './dom/Document';
-import { TransferredNode } from '../transfer/TransferrableNodes';
-import { WorkerDOMGlobalScope } from './WorkerDOMGlobalScope';
 
 interface EventOptions {
   bubbles?: boolean;

src/worker-thread/MutationObserver.ts

@@ -14,10 +14,11 @@
  * limitations under the License.
  */
 
-import { Node } from './dom/Node';
-import { MutationRecord } from './MutationRecord';
+import type { Document } from './dom/Document';
+import type { Node } from './dom/Node';
+import type { MutationRecord } from './MutationRecord';
+
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
-import { Document } from './dom/Document';
 import { transfer } from './MutationTransfer';
 
 const observers: MutationObserver[] = [];

src/worker-thread/MutationRecord.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { Node } from './dom/Node';
+import type { Node } from './dom/Node';
 
 // MutationRecord interface is modification and extension of the spec version.
 // It supports capturing property changes.

src/worker-thread/MutationTransfer.ts

@@ -14,15 +14,17 @@
  * limitations under the License.
  */
 
+import type { MutationFromWorker } from '../transfer/Messages';
+import type { Node } from './dom/Node';
+import type { Document } from './dom/Document';
+import type { DocumentStub } from './dom/DocumentLite';
+
 import { consume as consumeNodes } from './nodes';
 import { consume as consumeStrings } from './strings';
-import { MessageType, MutationFromWorker } from '../transfer/Messages';
+import { MessageType } from '../transfer/Messages';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
-import { Node } from './dom/Node';
 import { Phase } from '../transfer/Phase';
 import { phase, set as setPhase } from './phase';
-import { Document } from './dom/Document';
-import { DocumentStub } from './dom/DocumentLite';
 
 let pending = false;
 let pendingMutations: Array<number> = [];

src/worker-thread/ResizePropagation.ts

@@ -14,9 +14,11 @@
  * limitations under the License.
  */
 
-import { MessageToWorker, MessageType, ResizeSyncToWorker } from '../transfer/Messages';
+import type { MessageToWorker, ResizeSyncToWorker } from '../transfer/Messages';
+import type { WorkerDOMGlobalScope } from './WorkerDOMGlobalScope';
+
+import { MessageType } from '../transfer/Messages';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
-import { WorkerDOMGlobalScope } from './WorkerDOMGlobalScope';
 
 export function propagate(global: WorkerDOMGlobalScope): void {
   const document = global.document;

src/worker-thread/Storage.ts

@@ -14,13 +14,14 @@
  * limitations under the License.
  */
 
-import { Document } from './dom/Document';
+import type { Document } from './dom/Document';
+import type { DocumentStub } from './dom/DocumentLite';
+
 import { GetOrSet } from '../transfer/Messages';
 import { StorageLocation } from '../transfer/TransferrableStorage';
 import { TransferrableMutationType } from '../transfer/TransferrableMutation';
 import { store } from './strings';
 import { transfer } from './MutationTransfer';
-import { DocumentStub } from './dom/DocumentLite';
 
 /**
  * @see https://developer.mozilla.org/en-US/docs/Web/API/Storage

src/worker-thread/SyncValuePropagation.ts

@@ -14,11 +14,13 @@
  * limitations under the License.
  */
 
-import { MessageToWorker, MessageType, ValueSyncToWorker } from '../transfer/Messages';
+import type { MessageToWorker, ValueSyncToWorker } from '../transfer/Messages';
+import type { Document } from './dom/Document';
+import type { WorkerDOMGlobalScope } from './WorkerDOMGlobalScope';
+
+import { MessageType } from '../transfer/Messages';
 import { TransferrableKeys } from '../transfer/TransferrableKeys';
 import { get } from './nodes';
-import { Document } from './dom/Document';
-import { WorkerDOMGlobalScope } from './WorkerDOMGlobalScope';
 
 /**
  * When an event is dispatched from the main thread, it needs to be propagated in the worker thread.