Can socket.io-client use https?

Can socket.io-client use https?

connect does not run.

Is option missing?

//設定ファイルの読み込み
require('dotenv').config();

var fs = require('fs');
var ssl_server_key = '../../ssl/new_server.key';
var ssl_server_crt = '../../ssl/server.crt';
var options = {
    key: fs.readFileSync(ssl_server_key),
    cert: fs.readFileSync(ssl_server_crt),
    pfx: fs.readFileSync(ssl_server_crt),
    passphrase: process.env.HTTPS_PASS
};

//socket.io-clientでサーバへ接続
var client = require('socket.io-client');
var socket = client.connect('https://localhost:30000/namespace',options);

//処理
//connectしたら'how are you?'とメッセージを送信する
socket.on('connect',function(){
    console.log('yea!!');
    socket.send('how are you?');
    socket.disconnect();
    process.exit(0);
});

[ikuratakashi]

This is important.

options = { secure:true, reconnect: true, rejectUnauthorized : false };

Thank you.

[darrachequesne]

Example added here: https://socket.io/docs/v3/client-initialization/#Node-js-specific-options

Client

const fs = require("fs");
const socket = require("socket.io-client")("https://example.com", {
  ca: fs.readFileSync("./cert.pem")
});

Server

const fs = require("fs");
const server = require("https").createServer({
  cert: fs.readFileSync("./cert.pem"),
  key: fs.readFileSync("./key.pem")
});
const io = require("socket.io")(server);