## What should I do if the onKeyEvent event of the \<Web> component is not triggered as expected?
Applicable to: OpenHarmony 3.2 Beta 5 (API version 9)
**Problem**
The **onKeyEvent** event is set for the **\<Web>** component to listen for keyboard events. However, it is not triggered when a key is pressed or lifted.
**Solution**
Currently, the **\<Web>** component does not support the **onKeyEvent** event. To listen for keyboard events for the **\<Web>** component, you can use the **onInterceptKeyEvent** callback function.
## What should I do if page loading fails when onInterceptRequest is used to intercept URLs and return the custom HTML file?
Applicable to: OpenHarmony 3.2 Beta 5 (API version 9)
**Problem**
The **onInterceptRequest** API intercepts URLs specified by **src** and returns the custom HTML file. However, the content in the **script** tag in the HTML file is not loaded.
**Solution**
If only **setResponseData** is set for the interceptor, the kernel cannot identify the HTML file. You must also set parameters such as **setResponseEncoding**, **setResponseMimeType**, and **setResponseHeader** for the kernel to identify the HTML file.
2. Use the **JavaScriptProxy** API in ArkTs to register the object in ArkTS with the window object of H5, and then use the window object to call the method in H5. In the following example, the **testObj** object in ArkTS is registered with the window object of H5 with the alias **objName**. In H5, **window.objName** can then be used to access the object.
```
// xxx.ets
import web_webview from '@ohos.web.webview'
@Entry
@Component
struct Index {
@State message: string = 'Hello World'
controller: web_webview.WebviewController = new web_webview.WebviewController()
## How do I encapsulate a commonEvent utility class?
Applicable to: OpenHarmony SDK 3.2.5.3, stage model of API version 9
Applicable to: OpenHarmony 3.1 Beta 5 (API version 9)
The emitter data size cannot exceed 10240.
**Problem**
## How do I implement the click-a-notification-to-open-an-application function?
A commonEvent utility class needs to be encapsulated for the following purpose: Register a custom callback function when creating a subscriber, and then call the custom callback function when receiving an event notification.
Applicable to: OpenHarmony SDK 3.2.5.5, stage model of API version 9
**Solution**
You can implement this function by setting the **wantAgent** attribute in the **NotificationRequest** parameter of the **Notification.publish** API.
```
import commonEvent from '@ohos.commonEventManager';
Reference: [Notification](../reference/apis/js-apis-notification.md#notificationpublish) and [WantAgent](../reference/apis/js-apis-app-ability-wantAgent.md)
export class SubscribeEvent {
private static subscriber = null
// Custom callback function
private static callback = null
/**
* Create a subscriber.
* @param subscribeInfo Indicates the event to subscribe to.
## How do I make events be transferred in only one UIAbility instance?
Applicable to: OpenHarmony 3.2 Beta 5 (API version 9)
**Problem**
Events need to be subscribed to and triggered only in one UIAbility instance.
**Solution**
Use the API in the **EventHub** module of the UIAbility to subscribe to events. The **EventHub** module offers the event center, which provides the API for subscribing to, unsubscribing from, and triggering events.
**Example**
```
import UIAbility from '@ohos.app.ability.UIAbility';
export default class EntryAbility extends UIAbility {
The full SDK provides a full set of APIs available in OpenHarmony, including system APIs required by system applications. Vendors can leverage this SDK to develop applications.
Both the public SDK and full SDK are toolkits for application development. <br>The public SDK is intended for application developers and provided as standard in DevEco Studio. It does not contain system APIs – APIs required by system applications.
