export function reproduction() {
  let initializerWasCalled = false;

  function decorator(method: any, ctx: ClassMethodDecoratorContext<any, any>) {
    ctx.addInitializer(function () {
      console.info("Initializer called!");
      initializerWasCalled = true;
    });
    return method;
  }

  abstract class A {
    abstract a: number; // <-- Note, commenting out this completely unrelated abstract field fixes the issue (i.e. the initializer will be called.) Removing the "abstract" also works.

    @decorator
    method() {}
  }

  class B extends A {
    a = 1;
  }
  const b = new B();

  console.info("Was initializer called?:", initializerWasCalled); // false, expected: true
}

import react from "@vitejs/plugin-react";
import { defineConfig } from "vite";

// https://vite.dev/config/
export default defineConfig({
  plugins: [
    react({
      babel: {
        plugins: [["@babel/plugin-proposal-decorators", { version: "2023-11" }]],
      },
    }),
  ],
});