New Kitten update
• 
Kitten HTML templates and kitten.Component render functions can now be async.
This is quite a big one and it took me finally biting the bullet and getting my head around generators in JavaScript to implement properly.
So now you can mix synchronous and asynchronous components as you like and if there are any asynchronous components in your templates they will automatically be awaited (even if you forget to use await) ;)
I’ll write a proper post/tutorial/documentation for it soon but for the time being enjoy the screenshots where a layout template gets the latest three posts from my mock fediverse public timeline service and displays them on the page.
The kitten.Component version also has a refresh button that streams a different three to the page.
For those of you unfamiliar with Kitten, this is all the code in either example. No scaffolding, nothing. Pop either into a file called index.page.js and run kitten in that folder and visit https://localhost to see the example run.
Enjoy!
![const BasicLayoutTemplate = async ({ title, SLOT }) => {
const posts = (await (await fetch('https://streamiverse.small-web.org/public/')).json()).splice(0, 3)
return kitten.html`
<main>
<page css>
<h1>${title}</h1>
${SLOT}
<h2>Fediverse posts</h2>
<ul>
${posts.map(post => kitten.html`
<li><img src='${post.account.avatar}'> ${[post.content]}</li>
`)}
</ul>
<style>
li { display: flex; gap: 1em; margin-bottom: 1em; }
img { width: 5em; height: auto; }
</style>
</main>
`
}
export default async () => await kitten.html`
<${BasicLayoutTemplate} title='Async components are fun!'>
<markdown>
Oh, isn’t this __nice?__
</markdown>
</>
`](https://s3-eu-central-1.amazonaws.com/mastodon-aral/media_attachments/files/114/258/812/670/834/838/original/228733ad125b57f4.png "const BasicLayoutTemplate = async ({ title, SLOT }) => {
const posts = (await (await fetch('https://streamiverse.small-web.org/public/')).json()).splice(0, 3)
return kitten.html`
<main>
<page css>
<h1>${title}</h1>
${SLOT}
<h2>Fediverse posts</h2>
<ul>
${posts.map(post => kitten.html`
<li><img src='${post.account.avatar}'> ${[post.content]}</li>
`)}
</ul>
<style>
li { display: flex; gap: 1em; margin-bottom: 1em; }
img { width: 5em; height: auto; }
</style>
</main>
`
}
export default async () => await kitten.html`
<${BasicLayoutTemplate} title='Async components are fun!'>
<markdown>
Oh, isn’t this __nice?__
</markdown>
</>
`")
![class BasicLayoutTemplate extends kitten.Component {
async html ({title, SLOT}) {
return kitten.html`
<main id='page' morph>
<page css>
<h1>${title}</h1>
${SLOT}
<${FediversePosts.connectedTo(this)} />
</main>
`
}
}
class FediversePosts extends kitten.Component {
async html () {
const posts = (await (await fetch('https://streamiverse.small-web.org/public/')).json()).splice(Math.floor(Math.random()*6), 3)
return kitten.html`
<div id='posts' morph>
<h2>Fediverse posts</h2>
<ul>
${posts.map(post => kitten.html`
<li><img src='${post.account.avatar}'> ${[post.content]}</li>
`)}
</ul>
<button name='refresh' connect>Refresh</button>
<style>
li { display: flex; gap: 1em; margin-bottom: 1em; }
img { width: 5em; height: auto; }
</style>
</div>
`
}
onRefresh () { this.update() }
}
export default class MyPage extends kitten.Page {
async html () {
return kitten.html`
<${BasicLayoutTemplate.connectedTo(this)} title='Async components are fun!'>
<markdown>
Oh, isn’t this __nice?__
</markdown>
</>
`
}
}](https://s3-eu-central-1.amazonaws.com/mastodon-aral/media_attachments/files/114/258/813/076/463/648/original/22f714259e01b4f8.png "class BasicLayoutTemplate extends kitten.Component {
async html ({title, SLOT}) {
return kitten.html`
<main id='page' morph>
<page css>
<h1>${title}</h1>
${SLOT}
<${FediversePosts.connectedTo(this)} />
</main>
`
}
}
class FediversePosts extends kitten.Component {
async html () {
const posts = (await (await fetch('https://streamiverse.small-web.org/public/')).json()).splice(Math.floor(Math.random()*6), 3)
return kitten.html`
<div id='posts' morph>
<h2>Fediverse posts</h2>
<ul>
${posts.map(post => kitten.html`
<li><img src='${post.account.avatar}'> ${[post.content]}</li>
`)}
</ul>
<button name='refresh' connect>Refresh</button>
<style>
li { display: flex; gap: 1em; margin-bottom: 1em; }
img { width: 5em; height: auto; }
</style>
</div>
`
}
onRefresh () { this.update() }
}
export default class MyPage extends kitten.Page {
async html () {
return kitten.html`
<${BasicLayoutTemplate.connectedTo(this)} title='Async components are fun!'>
<markdown>
Oh, isn’t this __nice?__
</markdown>
</>
`
}
}")
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