Playwright for Browser Rendering

Fork of Playwright that was modified to be compatible with Cloudflare Workers and Browser Rendering.

🏷️ Upstream Playwright version: 1.55.0

Getting Started

Create a Cloudflare Worker

npm create cloudflare@latest -- cf-playwright-worker

Installation

This package is released on npmjs.com at @cloudflare/playwright. To install it in your project:

npm i -s @cloudflare/playwright

Configuration

📄 Place this in wrangler.toml

compatibility_flags = [ "nodejs_compat" ]
browser = { binding = "MYBROWSER" }

Example

You can find a full running example here Cloudflare Playwright running example

Screenshot

import { launch } from '@cloudflare/playwright';

export default {
  async fetch(request, env): Promise<Response> {
    const browser = await launch(env.MYBROWSER);
    const page = await browser.newPage();

    await page.goto('https://demo.playwright.dev/todomvc');

    const TODO_ITEMS = [
        'buy some cheese',
        'feed the cat',
        'book a doctors appointment'
    ];

    const newTodo = page.getByPlaceholder('What needs to be done?');
    for (const item of TODO_ITEMS) {
        await newTodo.fill(item);
        await newTodo.press('Enter');
    }

    const img = await page.screenshot();
    await browser.close();

    return new Response(img, {
        headers: {
            'Content-Type': 'image/png',
        },
    });
  }
} satisfies ExportedHandler<Env>;

Trace

import fs from "fs";

import { launch } from "@cloudflare/playwright";

export default {
  async fetch(request, env): Promise<Response> {
    const browser = await launch(env.MYBROWSER);
    const page = await browser.newPage();

    await page.context().tracing.start({ screenshots: true, snapshots: true });

    // ... do something, screenshot for example

    // For now, fs only supports writing into /tmp
    await page.context().tracing.stop({ path: "/tmp/trace.zip" });
    await browser.close();
    const file = await fs.promises.readFile("/tmp/trace.zip");

    return new Response(file, {
      status: 200,
      headers: {
        "Content-Type": "application/zip",
      },
    });
  }
} satisfies ExportedHandler<Env>;

Assertions

import { launch } from "@cloudflare/playwright";
import { expect } from "@cloudflare/playwright/test";

export default {
  async fetch(request, env): Promise<Response> {
    const browser = await launch(env.MYBROWSER);
    const page = await browser.newPage();

    await page.goto("https://demo.playwright.dev/todomvc");

    const TODO_ITEMS = [
      "buy some cheese",
      "feed the cat",
      "book a doctors appointment",
    ];

    const newTodo = page.getByPlaceholder("What needs to be done?");
    for (const item of TODO_ITEMS) {
      await newTodo.fill(item);
      await newTodo.press("Enter");
    }

    await expect(page.getByTestId("todo-title")).toHaveCount(TODO_ITEMS.length);

    await Promise.all(
      TODO_ITEMS.map((value, index) =>
        expect(page.getByTestId("todo-title").nth(index)).toHaveText(value)
      )
    );
  }
} satisfies ExportedHandler<Env>;

Contribute

Build

To build Playwright for Cloudflare:

npm ci
cd packages/playwright-cloudflare
npm run build

Run

To run the TodoMVC example:

• launch it with wrangler:

cd packages/playwright-cloudflare/examples/todomvc
npm ci
npx wrangler dev --remote

• press b to open the browser

🚧 Currently Unsupported Features

The following capabilities are not fully supported, but we’re actively working on them.

• Playwright Test except Assertions
• Components
• Firefox, Android and Electron, as well as different versions of Chrome
• Videos

This is not an exhaustive list — expect rapid changes as we work toward broader parity with the original feature set. You can also check latest test results for a granular up to date list of the features that are fully supported