mixins 的示例用法

<a-scene>
  <a-assets>
    <a-mixin id="red" material="color: red"></a-mixin>
    <a-mixin id="blue" material="color: blue"></a-mixin>
    <a-mixin id="cube" geometry="primitive: box"></a-mixin>
  </a-assets>
  <a-entity mixin="red cube"></a-entity>
  <a-entity mixin="blue cube"></a-entity>
</a-scene>

具有紅色立方體的實體將按順序從紅色 mixin 和立方體 mixin 中獲取屬性。與藍色立方體一樣。從概念上講,上述實體擴充套件到:

<a-entity material="color: red" geometry="primitive: box"></a-entity>
<a-entity material="color: blue" geometry="primitive: box"></a-entity>