ReactJS component cannot resolve a domain name

Question

When I use a component like

const React = require('react');
const dns = require('dns');

class DnsResolver extends React.Component {
    componentDidMount() {
        dns.resolve('https://www.google.com', (err, addresses) => {
            this.setState({
                address: addresses
            });
        });
    }

    render() {
        return (
            <div>
                {this.state.address}
            </div>
        );
    }
}

module.exports = DnsResolver;

the result is 0.0.0.0. Somehow, the browser cannot resolve the address. Why might this happen?

Says where? Then what is the dns.resolve() function for? reference — Emre Tapcı
– Emre Tapcı, Commented May 20, 2019 at 14:34
The initial point of my problem started when I tried to use mongodb npm module. It uses dns npm module to resolve the mongodb address, but since it runs at the frontend, dns.resolve() translates into this web extension function. NodeJS dns returns an array but web extension dns may return string. That's where the trouble starts. I maybe should not use mongodb at the frontend. — Emre Tapcı
– Emre Tapcı, Commented May 20, 2019 at 17:13
You cannot use MongoDB from the browser either. You need a backend. — SLaks
– SLaks, Commented May 20, 2019 at 17:18

Fernando Montoya · Accepted Answer · 2019-05-20 15:39:33Z

2

dns is a native NodeJS module, it is intended to use in the server.

answered May 20, 2019 at 15:39

Fernando Montoya

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