Is there any alternative of history.length to upgrade react-router?

Question

I want to upgrade the react-router package to v6. It has a dependency on the history package, and in the history package roadmap, the document says history.length will be deprecated and even deleted soon. You can take a look https://github.com/remix-run/history/issues/689

I wonder if there are other alternatives for using history.length in my code while upgrading the react-router package to the latest version.

As an example, one of my usage of it:

  import { useHistory } from 'react-router';

  const history = useHistory();

  const onGoBack = () => {
    if (history.length > 2) {
      history.goBack();
    } else {
      history.push('/portfolio');
    }
  };