I am writing Thunderbird WebExtension. I want to use Parsimmon in it. But when importing the module, Thunderbird claims

Uncaught Error: Dynamic require of "parsimmon" is not supported

(This message is printed if require === undefined)

So I decided to load umd.min.js via <script> tag in backgorund.html and options.html. But I don't know how to use type definition.

My current workaround is writing declare global {} and copy-and-pasting part of parsimmon.d.ts into it.

export {}

declare global {
  namespace Parsimmon {
    // ...
  }
}

VSCode code completion works well with this declaration.

import P = Parsimmon;
const integer: P.Parser<number> = P.regexp(/[0]|[1-9][0-9]*/).map(parseInt);

But I want to avoid copy-and-paste. Is there anyway to make use of node_modules/@types/parsimmon/index.d.ts directly?