Support shared signals in Preact islands (#4763)

* Support signals in Preact islands

* Add a changeset

* Only add signals if we need them

* Refactor signal logic into its own module

* Keep track of the signals used

1 files changed, 0 insertions, 24 deletions

diff --git a/packages/integrations/preact/static-html.js b/packages/integrations/preact/static-html.js
deleted file mode 100644
index 7e964ef06..000000000
--- a/packages/integrations/preact/static-html.js
+++ /dev/null
@@ -1,24 +0,0 @@
-import { h } from 'preact';
-
-/**
- * Astro passes `children` as a string of HTML, so we need
- * a wrapper `div` to render that content as VNodes.
- *
- * As a bonus, we can signal to Preact that this subtree is
- * entirely static and will never change via `shouldComponentUpdate`.
- */
-const StaticHtml = ({ value, name }) => {
-	if (!value) return null;
-	return h('astro-slot', { name, dangerouslySetInnerHTML: { __html: value } });
-};
-
-/**
- * This tells Preact to opt-out of re-rendering this subtree,
- * In addition to being a performance optimization,
- * this also allows other frameworks to attach to `children`.
- *
- * See https://preactjs.com/guide/v8/external-dom-mutations
- */
-StaticHtml.shouldComponentUpdate = () => false;
-
-export default StaticHtml;