const openFolderExplorer = require('nw-programmatic-folder-select');
// The window object, to have access to the browser context, and a callback function with the user's choice
openFolderExplorer(window, (selection) => { console.log(selection); });

const openFolderExplorer = require('nw-programmatic-folder-select');

const options = {
  // Optional string. The working directory to start in
  directory: 'C:\\',
  // Optional string. A custom title for the OS's folder selection dialog
  title: 'Select a folder to store the settings file in'
};

// Optional asynchronous callback function.
// Returns a string to the path, like 'C:\Users\Bob\Desktop', or undefined if no selection made
function callback (selection) {
  if (selection) {
    console.log('The user chose ' + selection);
  } else {
    console.log('The user cancelled the dialog.');
  }
}

// Window is required to have access to the browser context
// All other arguments are optional
openFolderExplorer(window, options, callback);