Can't make `hellosign-embedded` work with `next/dynamic` in TS project

Question

as the title says I can't make hellosign-embedded work with next

My app will be served though a CDN, so I don't cake if it won't work with SSR

const HelloSign: any = dynamic(
  (): any => {
    return import("hellosign-embedded")
  },
  { ssr: false }
)

export default function Home() {

  const client =
    typeof window !== "undefined"
      ? new HelloSign({
          allowCancel: false,
          clientId: "HELLO SIGN CLIENT ID", // DEV HelloSign Client ID
          skipDomainVerification: true,
        })
      : null

  return null
}

I keep getting TypeError: HelloSign is not a constructor

I also created this issue on GitHub with further information

Answer 1

Edit:

I see now where things got confusing. hellosign-embedded references the window object (i.e., the import needs to be visible only during the client-side compilation phase). I saw that next/dynamic was being used to import a module. Since dynamic() returns a type of ComponentType and the containing client variable was inside the Home function, I had incorrectly assumed you were trying to import a React component.

It turns out hellosign-embedded isn't even a React component at all so you shouldn't use next/dynamic. You should be able to use ES2020 imports instead. Your pages/index.tsx file will look something like this:

import type { NextPage } from "next";

const openDocument = async () => {
  // ES2020 dynamic import
  const HelloSign = (await import("hellosign-embedded")).default;

  const client = new HelloSign({
    allowCancel: false,
    clientId: "HELLO SIGN CLIENT ID", // DEV HelloSign Client ID
    skipDomainVerification: true,
  });

  client.open("https://www.example.com");
};

const Home: NextPage = () => {
  return <button onClick={() => openDocument()}>Open</button>;
};

export default Home;

---

disregard old answer:

HelloSign is of type ComponentType, so you can use the JSX element stored in the variable directly:

// disregard: see edit above
// export default function Home() {
// 
//   const client =
//     typeof window !== "undefined" ? (
//       <HelloSign
//         allowCancel={false}
//         clientId="HELLO SIGN CLIENT ID" // DEV HelloSign Client ID
//         skipDomainVerification={true}
//       />
//     ) : null;
// 
//   return client;
// 
// };