'Failed to resolve module specifier "net"

I am running express app.

I have a connect.js file I have a class in which I have some functions running some tcp/ip socket code.

And from html file, I am calling the connect.js file.

This connect.js file imports 'net' module.

Running index.js has no issues but the browser the browser throws

I get an error in the browser.

Failed to resolve module specifier "net". Relative references must start with either "/", "./", or "../".

below are the snippets from my code.

/connect.js

import net from 'net'

class Connect{

    constructor(Ip, Port) {

        this.Host = Ip;
        this.Port = Port;
    }

index.js

app.get('/', function(req, res){
  res.render('main.html');

main.html

<head>
<title>Login</title>
<script type = "module" src= '../labconnect.js'></script>
</head>

javascript express

Sources

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