The instance of the <ui:button> is passed as a parameter to the constructor function and I keep a reference to it as this.element.

<ui:button>的实例被作为参数传递给构造函数，我使用 this.element保持对它的引用。

youdao

The instance of the <ui:button> is passed as a parameter to the constructor function and I keep a reference to it as this.element.

<ui:button>的实例被作为参数传递给构造函数，我使用 this.element保持对它的引用。

youdao