add: globalThis.fetch

Author: takurinton

prerender.js

@@ -2,13 +2,23 @@ import { h, options, cloneElement } from 'preact';
 import renderToString from 'preact-render-to-string';
 
 let vnodeHook;
+let initialized = false;
 
 const old = options.vnode;
 options.vnode = vnode => {
 	if (old) old(vnode);
 	if (vnodeHook) vnodeHook(vnode);
 };
 
+async function init() {
+	const fs = (await eval('u=>import(u)')('fs')).promises;
+	// eslint-disable-next-line no-undef
+	globalThis.fetch = async url => {
+		const text = () => fs.readFile('dist/' + String(url).replace(/^\//, ''), 'utf-8');
+		return { text, json: () => text().then(JSON.parse) };
+	};
+}
+
 /**
  * @param {ReturnType<h>} vnode The root JSX element to render (eg: `<App />`)
  * @param {object} [options]
@@ -18,6 +28,11 @@ options.vnode = vnode => {
 export default async function prerender(vnode, options) {
 	options = options || {};
 
+	if (!initialized) {
+		initialized = true;
+		await init();
+	}
+
 	const maxDepth = options.maxDepth || 10;
 	const props = options.props;
 	let tries = 0;