使用browserify时，在puppeteer中找不到websocket

npm install ws

// main.js
const WebSocket = require('ws');

browserify main.js -o bundle.js

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('file://' + __dirname + '/bundle.js');
  // 其他操作...
  await browser.close();
})();

const browser = await puppeteer.launch({
  args: ['--no-sandbox', '--disable-setuid-sandbox']
});

page.on('console', msg => console.log('PAGE LOG:', msg.text()));
page.on('error', error => console.error('PAGE ERROR:', error));

// main.js
const WebSocket = require('ws');

const ws = new WebSocket('ws://example.com/socket');

ws.on('open', function open() {
  ws.send('something');
});

ws.on('message', function incoming(data) {
  console.log(data);
});

browserify main.js -o bundle.js

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('file://' + __dirname + '/bundle.js');
  await browser.close();
})();