javascript - What Express websocket events exist? -

i wondering web socket events exist? far have been using ws.on('message') event, use event triggered when connection established , closed. tried adding ws.on('connection'), didn't triggered.

why isin't there list of events in websocket modules documentation? https://www.npmjs.com/package/express-ws

my code:

app.ws('/', function (ws, req) {     ws.on('message', function (textchunk) {             //do stuff         }     }); }); 

do need client side programming this?

edit: tried adding this, didn't trigger when connected client.

ws.on('request', function () {         console.log("request");     }); 

after looking @ source code express-ws looks can following.

var express = require('express');  var app = express();  var expressws = require('express-ws')(app);    // websocketserver instance getwss()  // https://github.com/henningm/express-ws/blob/5b5cf93bb378a0e6dbe6ab33313bb442b0c25868/index.js#l72-l74  expressws.getwss().on('connection', function(ws) {    console.log('connection open');  });    // ... express middleware    // ... websocket middle ware  app.ws('/', function(ws, req) {    ws.on('message', function(msg) {      console.log(msg);    });  });    app.listen(3000);

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old response

there following:

close error message open 

https://developer.mozilla.org/en-us/docs/web/api/websocket#attributes