dart web ui webcomponents 将来会扩展 html 元素

Question

我在 darts web ui 介绍页面上读到了这个。

The constructor attribute indicates the class that defines this component’s behavior (for example, “CounterComponent”). Today, this class must be a subclass of WebComponent, but in the future it will be possible to use a subclass of the HTML element declared in the extends attribute. In the preceding example, that would mean class CounterComponent extends DivElement ....

他们是否说过何时安排此更改，是否需要重写扩展 WebComponent 的旧组件？

Answer 1

我不知道何时/是否会发生这种情况，但 WebComponent 类具有以下注释:

  /**
   * Temporary property until components extend [Element]. An element can
   * only be associated with one host, and it is an error to use a web component
   * without an associated host element.
   */
  Element get host { ... }

由于它说“临时”，我想如果您的代码明确指的是 host ，将需要进行一些更改。