Full alt-text for previous post (as it hits Mastodon’s arbitrary alt-text character limit.):

Screenshot of web browser at kitten.small-web.org/tutorials…

e.g., If you have a file called Styles.fragment.css, you’d import it like this:

import Styles from './Styles.fragment.css'

export default () => kitten.html`
<h1>This page contains a CSS fragment</h1>
<${Styles} />
`
HTML, CSS, and Markdown fragments support slots just like JavaScript fragments do (including named slots) but they do not support props (you can use named slots as a poor man’s props).

So, you could, for example, extend the styles you imported like this (although, you could, just as easily, add another <style>…</style> section to your code too):

import Styles from './Styles.fragment.css'

export default () => kitten.html`
<h1>This page contains a CSS fragment</h1>
<${Styles}>
h1 {
color: red;
}
</>
`
While HTML, CSS, and Markdown fragments are not as flexible as JavaScript fragments and components, you might find them useful as your editor might give you better language intelligence than in HTML and CSS tagged template strings, to save on one level of indentation, or for organisational preferences.

Speaking of language intelligence, you will likely notice that you get annoying type warnings when you import non-JavaScript fragments (e.g., Cannot find module './Styles.fragment.css' or its corresponding tyep declarations.)

You can fix this by including a simple TypeScript type declaration file (let’s call it fragments.d.ts) in the root folder of your project:

/**
Kitten fragment.
*/
const Fragment: (props?: {SLOT?: any}) => string

declare module '*.fragment.html' { export default Fragment }
declare module '*.fragment.css' { export default Fragment }
declare module '*.fragment.md' { export default Fragment }