### Basic Browser Automation in Python

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/quickstart.md

This Python example shows how to start a browser, navigate to a webpage, retrieve HTML content, save a screenshot, and close the browser. It depends on the zendriver library and asyncio. Input is a URL string; outputs include page content and a screenshot file. It may not work in all environments due to browser dependencies.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()
    page = await browser.get('https://example.com')

    # get HTML content of the page as a string
    content = await page.get_content()

    # save a screenshot
    await page.save_screenshot()

    # close the browser window
    await browser.stop()


if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Start Browser with Custom Options in Python

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/quickstart.md

This Python code starts a browser with custom settings like headless mode, user data directory, executable path, arguments, and language. It depends on zendriver. Inputs are configuration parameters; outputs a browser instance. User data dir prevents auto-cleanup, which may lead to disk space issues.

```python
import zendriver as zd

browser = await zd.start(
    headless=False,
    user_data_dir="/path/to/existing/profile",  # by specifying it, it won't be automatically cleaned up when finished
    browser_executable_path="/path/to/some/other/browser",
    browser_args=['--some-browser-arg=true', '--some-other-option'],
    lang="en-US"   # this could set iso-language-code in navigator, not recommended to change
)
tab = await browser.get('https://somewebsite.com')
```

--------------------------------

### Advanced Multi-Page Browser Control in Python

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/quickstart.md

This Python snippet illustrates opening multiple pages and tabs, selecting elements, flashing them, scrolling, and page management. It requires zendriver and asyncio. Inputs are URLs; outputs include manipulated page states. Limitations include potential issues with JavaScript-heavy sites.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()
    page = await browser.get('https://zendriver.dev/')

    elems = await page.select_all('*[src]')

    for elem in elems:
        await elem.flash()

    page2 = await browser.get('https://twitter.com', new_tab=True)
    page3 = await browser.get('https://github.com/ultrafunkamsterdam/nodriver', new_window=True)

    for p in (page, page2, page3):
        await p.bring_to_front()
        await p.scroll_down(200)
        await p   # wait for events to be processed
        await p.reload()
        if p != page3:
            await p.close()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Install and Run Basic Zendriver Script

Source: https://context7.com/stephanlensky/zendriver/llms.txt

Demonstrates how to install Zendriver via pip and execute a simple asynchronous Python script to start a browser, navigate to a URL, retrieve HTML content, take a screenshot, and clean up resources.

```python
# Install via pip
# pip install zendriver

import asyncio
import zendriver as zd

async def main():
    # Start browser with default settings
    browser = await zd.start()

    # Navigate to a page
    page = await browser.get('https://example.com')

    # Get HTML content
    content = await page.get_content()
    print(content)

    # Take a screenshot
    await page.save_screenshot('example.png')

    # Clean up
    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())

```

--------------------------------

### Configure Browser Settings via Config Object in Python

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/quickstart.md

This Python snippet uses the Config class to set browser options equivalently. It requires zendriver. Inputs are config properties; outputs a configured setup. Similar to direct options, specifying user_data_dir avoids cleanup, potentially causing persistent data.

```python
import zendriver as zd

config = zd.Config()
config.headless = False
config.user_data_dir="/path/to/existing/profile",  # by specifying it, it won't be automatically cleaned up when finished
config.browser_executable_path="/path/to/some/other/browser",
config.browser_args=['--some-browser-arg=true', '--some-other-option'],
config.lang="en-US"   # this could set iso-language-code in navigator, not recommended to change
```

--------------------------------

### Python: Automate Imgur Screenshot Upload with Zendriver

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/quickstart.md

This Python script uses Zendriver to automate uploading a screenshot of a GitHub page to Imgur. It navigates to Imgur, takes a screenshot of a specified GitHub repository, uploads the screenshot, fills in a title, and extracts the resulting shareable link. Requires the 'zendriver' and 'pathlib' libraries.

```python
import asyncio
from pathlib import Path
import zendriver as zd

DELAY = 2

async def main():
    browser = await zd.start()
    tab = await browser.get("https://imgur.com")

    # now we first need an image to upload, lets make a screenshot of the project page
    save_path = Path("screenshot.jpg").resolve()
    # create new tab with the project page
    temp_tab = await browser.get(
        "https://github.com/ultrafunkamsterdam/undetected-chromedriver", new_tab=True
    )

    # wait page to load
    await temp_tab
    # save the screenshot to the previously declared path of screenshot.jpg (which is just current directory)
    await temp_tab.save_screenshot(save_path)
    # done, discard the temp_tab
    await temp_tab.close()

    # accept goddamn cookies
    # the best_match flag will filter the best match from
    # matching elements containing "consent" and takes the
    # one having most similar text length
    consent = await tab.find("Consent", best_match=True)
    await consent.click()

    # shortcut
    await (await tab.find("new post", best_match=True)).click()

    file_input = await tab.select("input[type=file]")
    await file_input.send_file(save_path)
    # since file upload takes a while , the next buttons are not available yet

    await tab.wait(DELAY)

    # wait until the grab link becomes clickable, by waiting for the toast message
    await tab.select(".Toast-message--check")

    # this one is tricky. we are trying to find a element by text content
    # usually. the text node itself is not needed, but it's enclosing element.
    # in this case however, the text is NOT a text node, but an "placeholder" attribute of a span element.
    # so for this one, we use the flag return_enclosing_element and set it to False
    title_field = await tab.find("give your post a unique title", best_match=True)
    print(title_field)
    await title_field.send_keys("undetected zendriver")

    grab_link = await tab.find("grab link", best_match=True)
    await grab_link.click()

    # there is a delay for the link sharing popup.
    # let's pause for a sec
    await tab.wait(DELAY)

    # get inputs of which the value starts with http
    input_thing = await tab.select("input[value^=https]")

    my_link = input_thing.attrs.value

    print(my_link)
    await browser.stop()


if __name__ == "__main__":
    asyncio.run(main())

```

--------------------------------

### Set Asyncio Event Loop Policy for Windows in Python

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/quickstart.md

This Python code sets the WindowsSelectorEventLoopPolicy for better asyncio compatibility on Windows. It depends on asyncio and sys. No direct inputs/outputs; affects event loop behavior. Limited to Windows platforms only.

```python
import asyncio
import sys

if sys.platform == "win32":
    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
```

--------------------------------

### Configure Zendriver Browser Startup Options

Source: https://context7.com/stephanlensky/zendriver/llms.txt

Shows two methods for configuring browser startup parameters in Zendriver. Method 1 passes arguments directly to the `start()` function, while Method 2 utilizes a `zd.Config` object for more granular control over settings like headless mode, user data directory, and browser arguments.

```python
import asyncio
import zendriver as zd

async def main():
    # Method 1: Pass arguments directly to start()
    browser = await zd.start(
        headless=False,
        user_data_dir="/path/to/profile",
        browser_executable_path="/usr/bin/chromium",
        browser_args=['--window-size=1920,1080', '--disable-gpu'],
        sandbox=True,
        lang="en-US",
        user_agent="Mozilla/5.0 Custom Agent"
    )

    # Method 2: Use Config object for more control
    config = zd.Config()
    config.headless = True
    config.user_data_dir = "/tmp/browser_profile"
    config.browser_args = ['--incognito', '--disable-blink-features=AutomationControlled']

    browser2 = await zd.Browser.create(config)

    await browser.stop()
    await browser2.stop()

if __name__ == '__main__':
    asyncio.run(main())

```

--------------------------------

### Install Zendriver Package using Shell

Source: https://github.com/stephanlensky/zendriver/blob/main/README.md

This shell script installs the Zendriver package via pip, with comments listing alternative package managers. It requires a Python environment with pip installed. Outputs: Installs the Zendriver module system-wide, enabling its import in Python scripts.

```sh
pip install zendriver
# or uv add zendriver, poetry add zendriver, etc.
```

--------------------------------

### Automate Browser Navigation with Zendriver Python

Source: https://github.com/stephanlensky/zendriver/blob/main/README.md

This Python script demonstrates starting a browser with Zendriver, navigating to a URL, and saving a screenshot. It depends on the zendriver package, asyncio, and Chrome browser. Inputs: A URL string; Outputs: A PNG screenshot file named 'browserscan.png'.

```python
import asyncio

import zendriver as zd

async def main():
    browser = await zd.start()
    page = await browser.get("https://www.browserscan.net/bot-detection")
    await page.save_screenshot("browserscan.png")
    await browser.stop()

if __name__ == "__main__":
    asyncio.run(main())
```

--------------------------------

### Handling File Upload and Download with Zendriver (Python)

Source: https://context7.com/stephanlensky/zendriver/llms.txt

This example demonstrates uploading files via input elements and downloading with expectation patterns using Zendriver. It requires Zendriver, asyncio, os, and base64; inputs are file paths, outputs include saved screenshots and downloaded files. Limitations may arise from site-specific upload/download behaviors and file size handling.

```python
import asyncio
import os
import base64
import zendriver as zd

async def main():
    browser = await zd.start()
    page = browser.main_tab

    # File upload example
    await page.get("https://imgur.com/upload")

    # Find file input element
    file_input = await page.select("input[type=file]")

    # Send file to input
    await file_input.send_file("/path/to/image.png")

    # Wait for upload
    await page.wait(2)

    # File download example with expect pattern
    await page.get("https://translate.yandex.com/en/ocr")

    # Upload an image first
    await (await page.select('input[type="file"]')).send_file("/path/to/document.jpg")
    await asyncio.sleep(3)

    # Handle download with context manager
    async with page.expect_download() as download_ex:
        # Trigger download action
        await (await page.select("#downloadButton")).mouse_click()

        # Wait for download to complete
        download = await download_ex.value

    print(f"Downloaded: {download.suggested_filename}")

    # Save downloaded file
    output_dir = "./downloads"
    with open(os.path.join(output_dir, download.suggested_filename), "wb") as f:
        bytes_file = base64.b64decode(download.url.split(",", 1)[-1])
        f.write(bytes_file)

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Listen to CDP Console Message Events

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/tutorials/cdp.md

This Python example demonstrates how to listen to CDP events, specifically console messages. It prints the console messages received from the browser. Requires the runtime domain to be enabled.

```python
# Listen to console messages
async def on_console_message(event):
    print(f"Console message: {event['message']['text']}")

await page.on("Runtime.consoleAPICalled", on_console_message)
```

--------------------------------

### Monitoring Network Traffic and Intercepting Requests with Zendriver (Python)

Source: https://context7.com/stephanlensky/zendriver/llms.txt

This code sets up event handlers to monitor outgoing requests and incoming responses using Zendriver's CDP integration. It depends on Zendriver and asyncio; inputs are network events, outputs are printed request/response details. Limitations include no modification of requests in this basic handler setup.

```python
import asyncio
from zendriver import cdp, start

async def request_handler(event: cdp.network.RequestWillBeSent):
    """Handle outgoing requests"""
    request = event.request
    print(f"REQUEST: {request.method} {request.url}")
    for key, value in request.headers.items():
        print(f"  {key}: {value}")

async def response_handler(event: cdp.network.ResponseReceived):
    """Handle incoming responses"""
    response = event.response
    print(f"RESPONSE: {response.status} {response.url}")
    print(f"  Content-Type: {response.mime_type}")

async def main():
    browser = await start()
    tab = browser.main_tab

    # Register event handlers for network events
    tab.add_handler(cdp.network.RequestWillBeSent, request_handler)
    tab.add_handler(cdp.network.ResponseReceived, response_handler)

    # Navigate to trigger network events
    await browser.get("https://www.google.com")

    # Wait for events to process
    await tab
    await tab.sleep(2)

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Manipulate Browser Elements with Zendriver

Source: https://context7.com/stephanlensky/zendriver/llms.txt

Demonstrates advanced element interactions like getting attributes, properties, HTML, positioning, mouse events, flashing, scrolling, and taking screenshots. It also covers direct value setting, clearing input fields, and querying child elements within a parent element. Requires the zendriver library.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()
    page = await browser.get("https://example.com")

    # Find element
    link = await page.select("a")

    # Get element attributes
    href = link.attrs.href
    class_name = link.attrs.get("class", "")
    print(f"Link href: {href}, class: {class_name}")

    # Get JavaScript properties
    js_attrs = await link.get_js_attributes()
    inner_text = js_attrs.innerText

    # Get element HTML
    html = await link.get_html()
    print(f"Element HTML: {html}")

    # Element positioning
    position = await link.get_position()
    if position:
        print(f"Position: x={position.x}, y={position.y}")

    # Mouse interactions
    await link.mouse_move()  # Move mouse to element
    await link.mouse_click(button="left", click_count=1)

    # Flash element for debugging (visual highlight)
    await link.flash(duration=0.5)

    # Scroll element into view
    await link.scroll_into_view()

    # Take screenshot of element only
    await link.save_screenshot("element.png")

    # Set value directly via JavaScript
    input_field = await page.select("input")
    await input_field.set_value("new value")

    # Clear input field
    await input_field.clear_input()

    # Query elements within element
    child_elements = await link.query_selector_all("span")

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Download grocery list as text file

Source: https://github.com/stephanlensky/zendriver/blob/main/tests/sample_data/groceries.html

Creates and downloads a text file containing grocery items. The function uses the Blob API to generate a file and creates a temporary link to trigger the download. No external dependencies required.

```javascript
function downloadGroceryList() { const groceries = [ "Apples (42)", "Bananas", "Carrots", "Donuts", "Eggs", "French Fries", "Grapes" ]; const blob = new Blob([groceries.join('\n')], { type: 'text/plain' }); const a = document.createElement('a'); a.href = URL.createObjectURL(blob); a.download = 'grocery_list.txt'; document.body.appendChild(a); a.click(); document.body.removeChild(a); }
```

--------------------------------

### Execute Custom CDP Commands with Zendriver

Source: https://context7.com/stephanlensky/zendriver/llms.txt

Shows how to directly use low-level Chrome DevTools Protocol (CDP) commands for advanced browser control. This includes enabling domains, manipulating network conditions, setting geolocation, custom page navigation with referrers, and retrieving performance metrics. Requires the zendriver library.

```python
import asyncio
from zendriver import cdp, start

async def main():
    browser = await start()
    tab = browser.main_tab

    # Enable DOM domain
    await tab.send(cdp.dom.enable())

    # Get document root node
    doc = await tab.send(cdp.dom.get_document())
    root_node = doc.root

    # Custom network configuration
    await tab.send(cdp.network.enable())
    await tab.send(cdp.network.set_cache_disabled(cache_disabled=True))

    # Emulate network conditions (throttling)
    await tab.send(cdp.network.emulate_network_conditions(
        offline=False,
        latency=100,  # ms
        download_throughput=750 * 1024,  # bytes/s
        upload_throughput=250 * 1024
    ))

    # Set geolocation
    await tab.send(cdp.emulation.set_geolocation_override(
        latitude=37.7749,
        longitude=-122.4194,
        accuracy=100
    ))

    # Custom page navigation with referrer
    await tab.send(cdp.page.navigate(
        url="https://example.com",
        referrer="https://google.com"
    ))

    # Get performance metrics
    await tab.send(cdp.performance.enable())
    metrics = await tab.send(cdp.performance.get_metrics())
    for metric in metrics.metrics:
        print(f"{metric.name}: {metric.value}")

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Manage Browser Tabs and Windows with Zendriver

Source: https://context7.com/stephanlensky/zendriver/llms.txt

Covers the management of multiple browser windows and tabs, including opening new tabs and windows, iterating through them, activating tabs, scrolling, retrieving window information, resizing, setting window states (maximize, minimize, fullscreen), tiling windows, closing tabs, and bringing the main tab to the front. Requires the zendriver library.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()

    # Open multiple tabs
    tab1 = await browser.get("https://example.com")
    tab2 = await browser.get("https://github.com", new_tab=True)
    tab3 = await browser.get("https://google.com", new_window=True)

    # Iterate through all tabs
    for tab in browser.tabs:
        await tab.activate()
        print(f"Tab URL: {tab.url}")
        await tab.scroll_down(100)

    # Get window information
    window_id, bounds = await tab3.get_window()
    print(f"Window position: {bounds.left}, {bounds.top}")
    print(f"Window size: {bounds.width}x{bounds.height}")

    # Resize and position window
    await tab3.set_window_size(
        left=0,
        top=0,
        width=1920,
        height=1080
    )

    # Window states
    await tab3.maximize()
    await asyncio.sleep(1)
    await tab3.minimize()
    await asyncio.sleep(1)
    await tab3.fullscreen()

    # Tile windows in grid
    await browser.tile_windows(max_columns=3)

    # Close specific tabs
    await tab2.close()

    # Main tab reference
    main = browser.main_tab
    await main.bring_to_front()

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Zendriver Page Navigation and JavaScript Execution

Source: https://context7.com/stephanlensky/zendriver/llms.txt

Demonstrates various page navigation techniques and JavaScript execution within a browser controlled by Zendriver. This includes opening pages in new tabs or windows, navigating back/forward, reloading, executing arbitrary JavaScript code, scrolling the page, and managing tabs.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()

    # Open page in current tab
    page = await browser.get('https://example.com')

    # Open in new tab
    page2 = await browser.get('https://github.com', new_tab=True)

    # Open in new window
    page3 = await browser.get('https://google.com', new_window=True)

    # Navigate back/forward
    await page.back()
    await page.forward()
    await page.reload()

    # Execute JavaScript
    title = await page.evaluate("document.title")
    user_agent = await page.evaluate("navigator.userAgent")
    print(f"Title: {title}, UA: {user_agent}")

    # Scroll page
    await page.scroll_down(200)
    await page.scroll_up(100)

    # Bring tab to front
    await page2.bring_to_front()

    # Close specific tab
    await page2.close()

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())

```

--------------------------------

### Capture Screenshots and Export PDFs with Zendriver (Python)

Source: https://context7.com/stephanlensky/zendriver/llms.txt

This Python code using Zendriver automates taking full-page screenshots, base64 screenshots, custom viewport screenshots, PDF exports with various options, MHTML snapshots, and element-specific screenshots. It requires Python 3.10+, asyncio, and the zendriver library for asynchronous browser control. Inputs are URLs and optional file paths; outputs include image files, base64 strings, PDFs, and MHTML files. Limitations include dependency on browser rendering and potential timeouts for dynamic content.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()
    page = await browser.get("https://example.com")

    # Full page screenshot (PNG)
    await page.save_screenshot("full_page.png")

    # Screenshot as base64 string
    screenshot_b64 = await page.screenshot_b64()

    # Screenshot with custom viewport
    await page.set_window_size(width=1920, height=1080)
    await page.save_screenshot("viewport_1920x1080.png")

    # Export page as PDF
    pdf_path = await page.print_to_pdf(
        "document.pdf",
        landscape=False,
        display_header_footer=True,
        print_background=True,
        scale=1.0,
        paper_width=8.5,  # inches
        paper_height=11.0,
        margin_top=0.4,
        margin_bottom=0.4,
        margin_left=0.4,
        margin_right=0.4
    )
    print(f"PDF saved to: {pdf_path}")

    # Save page as MHTML snapshot
    await page.save_snapshot("page_snapshot.mhtml")

    # Element-specific screenshot
    button = await page.select("button")
    await button.save_screenshot("button.png")

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Implement Wait Conditions and Timeouts with Zendriver (Python)

Source: https://context7.com/stephanlensky/zendriver/llms.txt

This Python code demonstrates Zendriver's wait strategies for dynamic content, including time-based waits, element appearance waits with timeouts, page ready state checks, custom conditions, and XPath queries. It uses Python 3.10+, asyncio, and the zendriver library for stealthy browser automation. Inputs are URLs and optional timeout values; outputs are found elements or exceptions. Limitations include reliance on browser state and potential failures for heavily dynamic pages without proper awaits.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()
    page = await browser.get("https://example.com")

    # Wait for specific time
    await page.wait(2.5)  # 2.5 seconds
    await page.sleep(1)   # Alternative syntax

    # Wait for element to appear (with timeout)
    try:
        # find() and select() automatically retry until timeout
        submit_button = await page.find("Submit", timeout=10)
        print("Button found!")
    except Exception as e:
        print(f"Element not found within timeout: {e}")

    # Wait for page ready state
    await page.wait_for_ready_state("complete")

    # Wait for custom condition
    async def condition_check():
        result = await page.evaluate("document.readyState === 'complete'")
        return result

    await page.wait_for(condition_check, timeout=10)

    # Await tab to ensure references are updated
    await page  # Process pending events

    # Wait for network idle (custom implementation)
    await page.wait(3)
    await page.evaluate("performance.getEntries().length")

    # XPath with timeout
    elements = await page.xpath("//button[@type='submit']", timeout=5)

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Customizing User Agent and Browser Fingerprint with Zendriver (Python)

Source: https://context7.com/stephanlensky/zendriver/llms.txt

This snippet customizes the browser's user agent, language, and platform to mimic a specific device and avoid detection. It requires the Zendriver library and asyncio. Inputs include custom user agent strings; outputs are verified via JavaScript evaluation, with limitations on full fingerprint evasion depending on site checks.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()
    tab = browser.main_tab

    # Set custom user agent, language, and platform
    await tab.set_user_agent(
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
        accept_language="de-DE",
        platform="Win32"
    )

    # Verify changes
    user_agent = await tab.evaluate("navigator.userAgent")
    language = await tab.evaluate("navigator.language")
    platform = await tab.evaluate("navigator.platform")

    print(f"User Agent: {user_agent}")
    print(f"Language: {language}")
    print(f"Platform: {platform}")

    # Navigate to target site
    await tab.get("https://www.browserscan.net/bot-detection")
    await tab.save_screenshot("bot_detection_test.png")

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Zendriver Element Selection and Interaction with Web Pages

Source: https://context7.com/stephanlensky/zendriver/llms.txt

Illustrates how to select HTML elements using text matching and CSS selectors, and then interact with them. This includes filling form fields, clicking buttons, and waiting for page loads using Zendriver's asynchronous capabilities.

```python
import asyncio
import zendriver as zd

async def main():
    browser = await zd.start()
    page = await browser.get('https://github.com/login')

    # Find element by text (best match finds most similar text length)
    login_btn = await page.find("Sign in", best_match=True)

    # Find by CSS selector (single element)
    username_field = await page.select("input[name='login']")
    password_field = await page.select("input[name='password']")

    # Find all elements matching selector
    all_links = await page.select_all("a")

    # Fill form fields
    await username_field.send_keys("myusername")
    await password_field.send_keys("mypassword")

    # Click button
    await login_btn.click()

    # Wait for page to load
    await page

    await browser.stop()

if __name__ == '__main__':
    asyncio.run(main())

```

--------------------------------

### Send CDP Command to Enable Runtime Domain

Source: https://github.com/stephanlensky/zendriver/blob/main/docs/tutorials/cdp.md

This Python snippet sends a CDP command to enable the runtime domain in Zendriver. It shows how to use CDP when Zendriver does not provide a specific API. Requires an active browser instance.

```python
# Send a CDP command to enable the runtime domain
await page.send_cdp_command("Runtime.enable")
```

--------------------------------

### Managing Cookies for Session Persistence with Zendriver (Python)

Source: https://context7.com/stephanlensky/zendriver/llms.txt

This snippet handles saving, loading, and clearing cookies using Zendriver to maintain browser sessions across runs. It relies on Zendriver and asyncio; inputs are login credentials, outputs are printed cookie details. Limitations include profile directory management and site-specific cookie policies.

```python
import asyncio
import zendriver as zd

async def main():
    # Start browser with persistent profile
    browser = await zd.start(user_data_dir="./my_profile")

    # Login to a site
    page = await browser.get("https://example.com/login")
    username = await page.select("#username")
    password = await page.select("#password")
    await username.send_keys("myuser")
    await password.send_keys("mypass")
    await (await page.select("#submit")).click()

    # Wait for login
    await page.wait(2)

    # Save cookies to file
    await browser.cookies.save(".cookies.dat")

    await browser.stop()

    # Later session: restore cookies
    browser2 = await zd.start(user_data_dir="./my_profile")

    # Load cookies
    await browser2.cookies.load(".cookies.dat")

    # Now visit site with restored session
    page2 = await browser2.get("https://example.com/dashboard")

    # Get all cookies
    all_cookies = await browser2.cookies.get_all()
    for cookie in all_cookies:
        print(f"{cookie.name}: {cookie.value}")

    # Clear cookies
    await browser2.cookies.clear()

    await browser2.stop()

if __name__ == '__main__':
    asyncio.run(main())
```

--------------------------------

### Create Escape Key Modal Dialog Interface

Source: https://github.com/stephanlensky/zendriver/blob/main/tests/sample_data/special_key_detector.html

Implements a complete modal dialog system with HTML structure and CSS styling. Features include responsive design, backdrop blur effects, and hover states for interactive elements. The modal supports focus management and visual feedback for open/closed states.

```HTML
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Escape Key popUp Test</title>
</head>
<body>
    <div class="container">
        <h1>Escape Key popUp Test</h1>
        <p>Click the button below to open a popUp. Press <strong>Escape</strong> to close it.</p>
        <button id="mainpageButton">Open popUp</button>
        <div id="status">Ready - Click button to open popUp</div>
    </div>

    <!-- Modal/popup -->
    <div id="mainpage" class="modal" tabindex="-1">
        <div class="modal-content">
            <span class="closeButton">&times;</span>
            <h2 class="mainpage-title">Test popUp</h2>
            <p class="mainpage-text">This is a test popUp that can be closed with the Escape key.</p>
            <p><strong>Press Escape to close this popUp</strong></p>
            <div class="popUp-footer">
                <p>Zendriver Test Implementation</p>
            </div>
        </div>
    </div>
</body>
</html>
```

```CSS
body {
  margin: 0;
  padding: 2rem;
  font-family: Arial, sans-serif;
  font-size: 1.2rem;
  background-color: #fff;
  color: #000;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

#mainpageButton {
  background: #007bff;
  color: white;
  border: none;
  padding: 15px 30px;
  font-size: 18px;
  border-radius: 5px;
  cursor: pointer;
  margin: 20px;
}

#mainpageButton:hover {
  background: #0056b3;
}

/* Modal/mainpage styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
  background-color: white;
  margin: 15% auto;
  padding: 30px;
  border-radius: 10px;
  width: 400px;
  max-width: 90%;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  position: relative;
}

.closeButton {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 24px;
  font-weight: bold;
  color: #aaa;
  cursor: pointer;
}

.closeButton:hover {
  color: #000;
}

.mainpage-title {
  color: #333;
  margin-bottom: 20px;
}

.mainpage-text {
  color: #666;
  margin-bottom: 20px;
  line-height: 1.5;
}

.popUp-footer {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid #eee;
  color: #888;
  font-size: 14px;
}

/* Status indicator */
.status {
  margin: 20px 0;
  padding: 10px;
  border-radius: 5px;
  background: #ffffff;
}

.status.popUp-open {
  background: #ffffff;
}

.status.popUp-closed {
  background: #ffffff;
}
```

--------------------------------

### Implement Escape Key Event Handler and Popup Logic

Source: https://github.com/stephanlensky/zendriver/blob/main/tests/sample_data/special_key_detector.html

JavaScript implementation for popup management including escape key detection, focus management, and state tracking. Provides testing utilities for automated validation of popup state changes and includes wait functions for synchronous testing scenarios.

```JavaScript
const mainpage = document.getElementById('mainpage');
const openButton = document.getElementById('mainpageButton');
const status = document.getElementById('status');

// Track popUp state
let isPopUpOpen = false;

function openPopUp() {
  mainpage.style.display = 'block';
  isPopUpOpen = true;
  status.textContent = 'popUp is OPEN - Press Escape to close';
  status.className = 'status popUp-open';
  // Focus the popUp for better keyboard interaction
  mainpage.focus();
  window.popUpState = 'open';
}

function closePopUp() {
  mainpage.style.display = 'none';
  isPopUpOpen = false;
  status.textContent = 'popUp is CLOSED - Click button to open again';
  status.className = 'status popUp-closed';
  // Return focus to the open button
  openButton.focus();
  window.isPopUpOpen = 'closed';
}

// Open popUp when button is clicked
openButton.addEventListener('click', openPopUp);

// Close popUp when Escape key is pressed
document.addEventListener('keydown', function(event) {
  if (event.key === 'Escape' || event.keyCode === 27) {
    if (isPopUpOpen) {
      closePopUp();
      event.preventDefault(); // Prevent other escape behaviors
    }
  }
});

// Functions for zendriver testing
window.openTestmainpage = openPopUp;
window.closeTestmainpage = closePopUp;
window.ismainpageOpen = () => ismainpageOpen;
window.getmainpageState = () => window.mainpageState || 'closed';

// Wait for mainpage to open/close
window.waitFormainpageState = (expectedState, timeout = 5000) => {
  return new Promise((resolve, reject) => {
    const startTime = Date.now();
    const checkState = () => {
      const currentState = ismainpageOpen ? 'open' : 'closed';
      if (currentState === expectedState) {
        resolve(currentState);
      } else if (Date.now() - startTime > timeout) {
        reject(new Error(`Timeout waiting for mainpage state: ${expectedState}`));
      } else {
        setTimeout(checkState, 100);
      }
    };
    checkState();
  });
};

window.mainpageState = 'closed';
```

--------------------------------

### Create Complex Circular DOM Structures in JavaScript

Source: https://github.com/stephanlensky/zendriver/blob/main/tests/sample_data/complex_object.html

This JavaScript snippet generates a deeply nested object structure with circular references involving DOM elements, the document, and window objects. It requires a browser environment with DOM access and no specific inputs beyond the existing page elements. The output is an attached complex structure to DOM elements, which may trigger 'Object reference chain is too long' errors during serialization. Limitations include potential memory issues and browser-specific behavior in handling circular refs.

```javascript
// Remove no-js class immediately
document.body.classList.remove('no-js');
// The key insight is that DOM elements themselves can have properties added
// that create circular references when Chrome tries to serialize them
// Add complex circular references directly to DOM elements
document.body.complexRef = document;
document.body.windowRef = window;
document.body.self = document.body;
// Create a complex object and attach it to DOM elements
const createComplexStructure = () => {
  const structure = {};
  structure.self = structure;
  structure.body = document.body;
  structure.document = document;
  structure.window = window;
  // Create deep nesting with DOM references
  let current = structure;
  for (let i = 0; i < 100; i++) {
    current.next = { level: i, parent: current, body: document.body, document: document, window: window, elements: Array.from(document.querySelectorAll('*')) };
    current = current.next;
  }
  current.back_to_start = structure;
  return structure;
};
const complexStructure = createComplexStructure();
// Attach the complex structure to DOM elements
document.body.complexStructure = complexStructure;
document.documentElement.complexStructure = complexStructure;
// Add references to all elements
Array.from(document.querySelectorAll('*')).forEach((el, i) => {
  el.complexRef = complexStructure;
  el.index = i;
  el.bodyRef = document.body;
  el.documentRef = document;
  el.windowRef = window;
});
// Create circular references between elements
const allElements = Array.from(document.querySelectorAll('*'));
allElements.forEach((el, i) => {
  el.nextElement = allElements[(i + 1) % allElements.length];
  el.prevElement = allElements[(i - 1 + allElements.length) % allElements.length];
  el.allElements = allElements;
});
// Add properties to the body element that create deep circular references
document.body.deepRef = { level1: { level2: { level3: { level4: { level5: { body: document.body } } } } } };
document.body.deepRef.level1.level2.level3.level4.level5.back = document.body.deepRef;
console.log('Complex DOM structure with circular references created');
```