astro/packages/renderers/renderer-solid/server.js

import { createComponent } from 'solid-js';
import { renderToStringAsync, ssr } from 'solid-js/web/dist/server.cjs';

async function check(Component, props, children) {
  if (typeof Component !== 'function') return false;

  const { html } = await renderToStaticMarkup(Component, props, children);
  return typeof html === 'string';
}

async function renderToStaticMarkup(Component, props, children) {
  const html = await renderToStringAsync(
    () => () =>
      createComponent(Component, {
        ...props,
        // In Solid SSR mode, `ssr` creates the expected structure for `children`.
        // In Solid client mode, `ssr` is just a stub.
        children: ssr([`<astro-fragment>${children}</astro-fragment>`]),
      })
  );
  return { html };
}

export default {
  check,
  renderToStaticMarkup,
};