为什么 Angular 不需要组件名称中的破折号 [英] Why does Angular not need a dash in component name
问题描述
我想知道为什么 Polymer 元素需要在像 <my-component>
这样的自定义元素名称中使用破折号,而这对于 Angular 组件来说不是必需的,尤其是因为 Angular 组件也使用 ShadowDOM.
I wondered why Polymer elements need a dash in custom elements name like <my-component>
while this is not necessary for Angular components especially as Angular components also use ShadowDOM.
** 编辑**在 Angular 中,它甚至似乎都不是建议的好习惯.
** Edit** It doesn't even seem to be suggested good practice in Angular.
推荐答案
HTML 规范允许您使用未知标签(
,
) 没有 HTML 解析器抛出一个合适的.为了他们的利益,Angular 在他们的指令中使用这种行为来使组件像原生一样.
The HTML spec allows you to use unknown tags (<tab>
, <panel>
) without the HTML parser throwing a fit. To their benefit, Angular uses this behavior for their directives to make the components like native.
没有 -
的标签继承自 HTMLUnknownElement
.这里对升级过程有很好的解释:HTML5Rocks - 自定义元素 - 元素如何升级了
Tags that don't have a -
inherit from HTMLUnknownElement
. There's a good explanation of the upgrade process here: HTML5Rocks - Custom Elements - How elements are upgraded
由于 Angular 指令是在自定义元素规范存在之前设计的,因此它们不使用 -
.这是要求元素名称包含 -
的标准.
Since Angular directives were designed in a time before the Custom Elements spec existed, they don't use a -
. It's the standard that requires element names contain a -
.
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