How to create a self-closing HTML5 tag like <br> [closed]

问题

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Closed 5 years ago.

I want to basically make a custom tag that doesn't need to be closed and apply css to it.

It shouldn't look like this:<customtag></customtag>.

It should look like this: <customtag> or <customtag/>.

回答1:

Unless an element is already defined to be a void element in the HTML spec, they must have a closing tag.

Because of this, all custom web components must have a close tag. Additionally, custom elements must have a hyphen in their names to avoid conflicting with possible future tags.

来源：https://stackoverflow.com/questions/23353419/how-to-create-a-self-closing-html5-tag-like-br