step2

vite.config.ts

@@ -1,7 +1,30 @@
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
+import { readFileSync } from 'fs';
+import { read, utils } from 'xlsx';
 
-// https://vitejs.dev/config/
 export default defineConfig({
-  plugins: [vue()],
-})
+  assetsInclude: ['**/*.xlsx'], // xlsx file should be treated as assets
+
+  plugins: [
+    vue(),
+    { // this plugin handles ?sheetjs tags
+      name: "vite-sheet",
+      transform(code, id) {
+        if(!id.match(/\?sheetjs$/)) return;
+        var wb = read(readFileSync(id.replace(/\?sheetjs$/, "")));
+        var data = utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);
+        return `export default JSON.parse('${JSON.stringify(data)}')`;
+      }
+    },
+    { // this plugin handles ?b64 tags
+      name: "vite-b64-plugin",
+      transform(code, id) {
+        if(!id.match(/\?b64$/)) return;
+        var path = id.replace(/\?b64/, "");
+        var data = readFileSync(path, "base64");
+        return `export default '${data}'`;
+      }
+    }
+  ]
+});