Refactor: Vite

vite.config.ts

@@ -0,0 +1,26 @@
+/// <reference types="vite/client" />
+
+import { defineConfig } from 'vite'
+import preact from '@preact/preset-vite'
+
+import postCSSPurgeCSS from "@fullhuman/postcss-purgecss";
+
+// https://vite.dev/config/
+export default defineConfig({
+  css: {
+    ...(import.meta.env.NODE_ENV === "production") ? {
+      transformer: "postcss",
+      postcss: {
+        plugins: [
+          postCSSPurgeCSS({
+            content: ["./index.html", "./src/**/*.{ts,tsx}"],
+          })
+        ]
+      }
+    } : {transformer: "lightningcss"} 
+  },
+  build: {
+    cssMinify: "lightningcss",
+  },
+  plugins: [preact()],
+})