I have this code in my application.

const queryString = require('query-string');
const parsed = queryString.parse(location.search);
return this.docListingService.getPacks(parsed.policy).then(packs => {
    this.setState({ isLoading: false, packs });
    return packs;
}).catch((error) => {
    this.loggingService.logError('Error returning Docs ' + error);
    this.setState({ errorOccured: true});
});

It doesn't work because location.search is undefined.

I can see that location is http://localhost:3000/ which is where this application is running. How can/should this be set?