packages/renderers/preact/static-html.js


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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 }) => {
  if (!value) return null;
  return h('astro-fragment', { 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;