import from dist directory

I have manually build it and trying to import it directly in the browser.
```
import {LM} from '/node_modules/ml-levenberg-marquardt/dist/ml-levenberg-marquardt.js'
```
and getting the below error.

```
Uncaught SyntaxError: The requested module '/node_modules/ml-levenberg-marquardt/dist/ml-levenberg-marquardt.js' does not provide an export named 'LM' 
```
Any suggestion to solve it?
