问题描述
我正在从0.5迁移到1.0.
I'm doing migration from 0.5 to 1.0.
在阅读的同时，我注意到使用hostAttributes和properties声明属性的两种不同方式.
While reading, I notice 2 different way on declaring attributes, using hostAttributes and properties.
这2个有什么区别?
推荐答案
主机属性是与元素的相应Javascript属性(在properties中声明的)不匹配的属性.这包括class，tabindex，data-*属性，aria-roles等属性.要在创建时声明它们，必须在hostAttributes对象中进行设置.如果要将值绑定到它们中，则必须使用$=(它调用Element.setAttribute)而不是=.
Host attributes are attributes that do not match to an element's corresponding Javascript property (which you declare in properties). This includes attributes like class, tabindex, data-* attributes, aria-roles, etc. To declare them during create-time, you must set them in the hostAttributes object. If you are going to bind values into them, you must use $= (which calls Element.setAttribute) rather than =.
来源:
- https://www.polymer- project.org/1.0/docs/devguide/registering-elements.html#host-属性
- https://www.polymer- project.org/1.0/docs/devguide/data-binding.html#attribute-binding
- https://www.polymer-project.org/1.0/docs/devguide/registering-elements.html#host-attributes
- https://www.polymer-project.org/1.0/docs/devguide/data-binding.html#attribute-binding
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