type some of ExecutionContextDelegate

src/chromium/ExecutionContext.ts

@@ -149,7 +149,7 @@ export class ExecutionContextDelegate implements js.ExecutionContextDelegate {
     await releaseObject(this._client, toRemoteObject(handle));
   }
 
-  async handleJSONValue(handle: js.JSHandle): Promise<any> {
+  async handleJSONValue<T>(handle: js.JSHandle<T>): Promise<T> {
     const remoteObject = toRemoteObject(handle);
     if (remoteObject.objectId) {
       const response = await this._client.send('Runtime.callFunctionOn', {

src/firefox/ExecutionContext.ts

@@ -134,7 +134,7 @@ export class ExecutionContextDelegate implements js.ExecutionContextDelegate {
     });
   }
 
-  async handleJSONValue(handle: js.JSHandle): Promise<any> {
+  async handleJSONValue<T>(handle: js.JSHandle<T>): Promise<T> {
     const payload = handle._remoteObject;
     if (!payload.objectId)
       return deserializeValue(payload);

src/javascript.ts

@@ -10,7 +10,7 @@ export interface ExecutionContextDelegate {
   getProperties(handle: JSHandle): Promise<Map<string, JSHandle>>;
   releaseHandle(handle: JSHandle): Promise<void>;
   handleToString(handle: JSHandle, includeType: boolean): string;
-  handleJSONValue(handle: JSHandle): Promise<any>;
+  handleJSONValue<T>(handle: JSHandle<T>): Promise<T>;
 }
 
 export class ExecutionContext {

src/webkit/ExecutionContext.ts

@@ -289,7 +289,7 @@ export class ExecutionContextDelegate implements js.ExecutionContextDelegate {
     await releaseObject(this._session, toRemoteObject(handle));
   }
 
-  async handleJSONValue(handle: js.JSHandle): Promise<any> {
+  async handleJSONValue<T>(handle: js.JSHandle<T>): Promise<T> {
     const remoteObject = toRemoteObject(handle);
     if (remoteObject.objectId) {
       const response = await this._session.send('Runtime.callFunctionOn', {