ReferenceError: DEDICATED_COMPRESSOR_4KB is not defined

[Tuner32]

What is wrong with this? I use normal code and I just changed for nothing except SSLApp to App. it wor wll if I remove compressor option It work well. I used example code

code:
/* Non-SSL is simply App() /
require('uWebSockets.js').App().ws('/', {

/* There are many common helper features */
idleTimeout: 30,
maxBackpressure: 1024,
maxPayloadLength: 512,
compression: DEDICATED_COMPRESSOR_3KB,

/* For brevity we skip the other events (upgrade, open, ping, pong, close) /
message: (ws, message, isBinary) => {
/ You can do app.publish('sensors/home/temperature', '22C') kind of pub/sub as well */

/* Here we echo the message back, using compression if available */
let ok = ws.send(message, isBinary, true);

}

}).get('/*', (res, req) => {

/* It does Http as well */
res.writeStatus('200 OK').writeHeader('IsExample', 'Yes').end('Hello there!');

}).listen(9001, (listenSocket) => {

if (listenSocket) {
console.log('Listening to port 9001');
}

});

I used this on node 14.17.6
and it on window 10 1803

[kunal-mandalia]

Importing constants from package worked for me, e.g.:

const { DEDICATED_COMPRESSOR_3KB } = require('uWebSockets.js');