Updated the files.

my-app/node_modules/@vitejs/plugin-basic-ssl/dist/index.cjs

@@ -0,0 +1,45 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+const path = require('node:path');
+const node_fs = require('node:fs');
+
+function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e["default"] : e; }
+
+const path__default = /*#__PURE__*/_interopDefaultLegacy(path);
+
+const defaultCacheDir = "node_modules/.vite";
+function viteBasicSslPlugin() {
+  return {
+    name: "vite:basic-ssl",
+    async configResolved(config) {
+      const certificate = await getCertificate((config.cacheDir ?? defaultCacheDir) + "/basic-ssl");
+      const https = () => ({ cert: certificate, key: certificate });
+      config.server.https = Object.assign({}, config.server.https, https());
+      config.preview.https = Object.assign({}, config.preview.https, https());
+    }
+  };
+}
+async function getCertificate(cacheDir) {
+  const cachePath = path__default.join(cacheDir, "_cert.pem");
+  try {
+    const [stat, content] = await Promise.all([
+      node_fs.promises.stat(cachePath),
+      node_fs.promises.readFile(cachePath, "utf8")
+    ]);
+    if (Date.now() - stat.ctime.valueOf() > 30 * 24 * 60 * 60 * 1e3) {
+      throw new Error("cache is outdated.");
+    }
+    return content;
+  } catch {
+    const content = (await import('./chunks/certificate.cjs')).createCertificate();
+    node_fs.promises.mkdir(cacheDir, { recursive: true }).then(() => node_fs.promises.writeFile(cachePath, content)).catch(() => {
+    });
+    return content;
+  }
+}
+
+module.exports = viteBasicSslPlugin;
+module.exports["default"] = viteBasicSslPlugin;
+module.exports.getCertificate = getCertificate;

my-app/node_modules/@vitejs/plugin-basic-ssl/dist/index.d.ts

@@ -0,0 +1,6 @@
+import { Plugin } from 'vite';
+
+declare function viteBasicSslPlugin(): Plugin;
+declare function getCertificate(cacheDir: string): Promise<string>;
+
+export { viteBasicSslPlugin as default, getCertificate };

my-app/node_modules/@vitejs/plugin-basic-ssl/dist/index.mjs

@@ -0,0 +1,35 @@
+import path from 'node:path';
+import { promises } from 'node:fs';
+
+const defaultCacheDir = "node_modules/.vite";
+function viteBasicSslPlugin() {
+  return {
+    name: "vite:basic-ssl",
+    async configResolved(config) {
+      const certificate = await getCertificate((config.cacheDir ?? defaultCacheDir) + "/basic-ssl");
+      const https = () => ({ cert: certificate, key: certificate });
+      config.server.https = Object.assign({}, config.server.https, https());
+      config.preview.https = Object.assign({}, config.preview.https, https());
+    }
+  };
+}
+async function getCertificate(cacheDir) {
+  const cachePath = path.join(cacheDir, "_cert.pem");
+  try {
+    const [stat, content] = await Promise.all([
+      promises.stat(cachePath),
+      promises.readFile(cachePath, "utf8")
+    ]);
+    if (Date.now() - stat.ctime.valueOf() > 30 * 24 * 60 * 60 * 1e3) {
+      throw new Error("cache is outdated.");
+    }
+    return content;
+  } catch {
+    const content = (await import('./chunks/certificate.mjs')).createCertificate();
+    promises.mkdir(cacheDir, { recursive: true }).then(() => promises.writeFile(cachePath, content)).catch(() => {
+    });
+    return content;
+  }
+}
+
+export { viteBasicSslPlugin as default, getCertificate };