harmony 鸿蒙Web Subsystem ChangeLog

2023-02-17
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Web Subsystem ChangeLog

Compared with earlier versions, OpenHarmony 4.0.2.1 has the following API changes in its Web subsystem:

cl.web.1 Parameter Type Change of postMessageEvent

The postMessageEvent API supported only the string type. In OpenHarmony 4.0.2.1 and later versions, it also supports the ArrayBuffer type.

Change Impacts

The API change is forward compatible. Applications developed based on earlier versions can still use the API, and the original functions are not affected.

Key API/Component Changes

Involved APIs

postMessageEvent(message: string): void

Before change

  postMessageEvent(message: string): void

After change

  type WebMessage = ArrayBuffer|string
  postMessageEvent(message: WebMessage): void

Adaptation Guide

The API change is forward compatible. Applications developed based on earlier versions can still use the API, and the original functions are not affected.

cl.web.2 Parameter Type Change of onMessageEvent

The onMessageEvent API supported only the string type. In OpenHarmony 4.0.2.1 and later versions, it also supports the ArrayBuffer type.

Change Impacts

The API change is forward compatible. Applications developed based on earlier versions can still use the API. With the corresponding logic handling added, the original functions are not affected.

Key API/Component Changes

Involved APIs

onMessageEvent(callback: (result: string) => void): void

Before change

  onMessageEvent(callback: (result: string) => void): void

After change

  type WebMessage = ArrayBuffer|string
  onMessageEvent(callback: (result: WebMessage) => void): void

Adaptation Guide

The API change is forward compatible. Applications developed based on earlier versions can still use the API. With the corresponding logic handling added, the original functions are not affected.