How can I have intellisense in VS Code for opencv.js

I want to have intellisense for opencv.js inside VS Code when I call it from a JavaScript file, but when I use import "path/opencv.js" or import cv from "path/opencv.js", I can't have intellisense for cv.

In the OpenCV documentation, there are following description and a example:

Once opencv.js is ready, you can access OpenCV objects and functions through cv object. The promise-typed cv object should be unwrap with await operator. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await .

imgElement.onload = await function() {
  cv = (cv instanceof Promise) ? await cv : cv;
  let mat = cv.imread(imgElement);`
}

but the intellisense doesn't even show a promise-typed cv.

It is worth mentioning that my environment is browser.

Edit:

When I use import cv from "path/opencv.js" VS code detect 'cv' type as:

(alias) (local var) cv: (cv: any, ...args: any[]) => any

The way opencv.js exports its module is very complicated, it is not the modern way of exporting module:

(function (root, factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module.
    define(function () {
      return (root.cv = factory());
    });
  } else if (typeof module === 'object' && module.exports) {
    // Node. Does not work with strict CommonJS, but
    // only CommonJS-like environments that support module.exports,
    // like Node.
    module.exports = factory();
  } else {
    // Browser globals
    root.cv = factory();
  }
}(this, function () {
  var cv = function(cv) {
  cv = cv || {};
  var Module = cv;
  ...