try this

Author: larshp

extra.mjs

@@ -0,0 +1,8 @@
+import * as fs from "node:fs";
+
+// workaround for the class_constructor
+
+const filename = "./output/zcl_excel_worksheet.clas.mjs";
+let contents = fs.readFileSync(filename).toString("utf8");
+contents = `await import("./cl_abap_elemdescr.clas.mjs");\n` + contents;
+fs.writeFileSync(filename, contents);

package.json

@@ -10,7 +10,7 @@
     "clone": "npm run clone1 && npm run clone2 && npm run clone3",
     "dev": "webpack serve --mode development --env development",
     "webpack": "webpack",
-    "transpile": "abap_transpile abap_transpile.json",
+    "transpile": "abap_transpile abap_transpile.json && node extra.mjs",
     "test": "npm run clone && rm -rf input && mkdir input && node abap.mjs && npm run transpile && node examples.mjs && npm run webpack"
   },
   "author": "",

public/zcl_excel_demo1.xlsx

@@ -24,9 +24,9 @@ import * as abaplint from "@abaplint/core";
 import * as abapMonaco from "@abaplint/monaco";
 import Split from "split-grid";
 import { abapfiles } from "./abap.js";
-import * as initabap from "../output/init.mjs";
+import "../output/_init.mjs";
 import {Buffer} from "buffer";
-console.dir(initabap); // just to make sure its not shaked away
+// console.dir(initabap); // just to make sure its not shaked away
 
 const reg = new abaplint.Registry(new abaplint.Config(JSON.stringify(config)));
 for (const filename in abapfiles) {