custom tags in html code example
Example 1: custom html tags
<my-tag id="yourId" some-attr="someval"></my-tag>
my-tag {
color: red;
}
Example 2: create custum tage html
The document.registerElement() method is used to create a custom HTML element. This should be passed as the name of your custom element along with an (optional) object that defines the API.
var XTreehouseElement = document.registerElement('x-treehouse');
document.body.appendChild(new XTreehouseElement());
<x-treehouse></x-treehouse>