You can preview HTML by using @preview comment like below.

<p>Hello world</p>


You can define original HTML tags to be rendered on preview screen.

<!--@template -->
code here
<!--@/template -->

define default variables

You can also declare default variables when no parameters are found

<!--@template text="hoge" -->
<!--@/template -->

Supporse that above component name is main-visual, You can call defined template via @preview.

<main-visual text="hello world" />

is to be

<p>hello world</p>