Copper

Copper is a lightweight node.js library which allows creating Chrome or Chromium browser instances for controlling remotely either using Chrome DevTools Protocol or W3C WebDriver Protocol.

Use Cases

• Run tests on a remote chrome browser, using technologies you already use such as Puppeteer or WebdriverIO
• Run Selenium tests without Selenium - Copper simply replaces the Selenium server and compatible to most selenium clients
• Generate PDF or screenshots of a webpage
• Any other usage of a remote chromium instance you can think of: scraping, crawling, automating, and probably many more - just use Copper to create a remote Chromium and access it using one of the protocols it exposes: CDP and WebDriver

Getting started

Installation

npm i -g @copperjs/copper
# or
yarn global add @copperjs/copper

Usage

copper standalone --port 9115

run a puppeteer tests using copper:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.connect({ browserWSEndpoint: 'ws://localhost:9115' });
  const page = await browser.newPage();
  await page.goto('https://example.com');
  await page.screenshot({ path: 'example.png' });

  await browser.close();
})();

or run a selenium test using copper:

const webdriverio = require('webdriverio');

(async () => {
  const browser = await webdriverio.remote({ path: '/wd/hub/', hostname: 'localhost', port: 9115 });
  await browser.url('https://example.com');
  await page.saveScreenshot('example.png');

  await browser.deleteSession();
})();

Key Features

• Scale out multiple nodes of Copper using a Hub/Node architecture inspired by Selenium Grid (Hub/Node).
• Uses pure Node.js - no more complied binaries and jars that must match your browser version. Copper uses chrome-launcher meaning it will run on any machine with chrome/chromium on it.
• Lightweight and fast - see benchmarks

Our Name

Roadmap

• [x] create docker files for standalone, headless standalone, node, headless node, hub
• [x] write some uts
• [x] write nice readme
• [x] publish to npm
• [ ] support Docker and publish to Dockerhub
• [ ] support w3c Webdriver commands (WIP)
• [ ] support TLS
• [ ] support HTTP2
• [ ] benchmarks