astro/.changeset/silent-comics-hang.md
Matthew Phillips 73f215df76
Allow passing fetch() Response to set:html (#4832)
* ALlow passing fetch() Response to set:html

* Only check for Symbol.iterator on objects

* oops

* Fix no-streaming case

* Remove old comment
2022-09-21 19:07:00 -04:00

49 lines
1.3 KiB
Markdown

---
'astro': minor
---
Allows Responses to be passed to set:html
This expands the abilities of `set:html` to ultimate service this use-case:
```astro
<div set:html={fetch('/legacy-post.html')}></div>
```
This means you can take a legacy app that has been statically generated to HTML and directly consume that HTML within your templates. As is always the case with `set:html`, this should only be used on trusted content.
To make this possible, you can also pass several other types into `set:html` now:
* `Response` objects, since that is what fetch() returns:
```astro
<div set:html={new Response('<span>Hello world</span>', {
headers: {
'content-type': 'text/html'
}
})}></div>
```
* `ReadableStream`s:
```astro
<div set:html={new ReadableStream({
start(controller) {
controller.enqueue(`<span>read me</span>`);
controller.close();
}
})}></div>
```
* `AsyncIterable`s:
```astro
<div set:html={(async function * () {
for await (const num of [1, 2, 3, 4, 5]) {
yield `<li>${num}</li>`;
}
})()}>
```
* `Iterable`s (non-async):
```astro
<div set:html={(function * () {
for (const num of [1, 2, 3, 4, 5]) {
yield `<li>${num}</li>`;
}
})()}>
```