I wrote the following script to download as pdf a google docs file; when I click alt+p nothing happens. I’m using Google Chrome browser.

Can you tell me how to fix it please?

(function() {
    'use strict';

    document.addEventListener('keydown', function(e) {
        if (e.altKey && e.key === 'p') {
            let fileId = window.location.pathname.split('/')[3];
            let downloadUrl = `https://docs.google.com/document/d/${fileId}/export?format=pdf`;
            window.open(downloadUrl, '_blank');
        }
    });
})();