Class: Playwright::CDPSession

Inherits:

PlaywrightApi

• Object
• PlaywrightApi
• Playwright::CDPSession

Defined in:

lib/playwright_api/cdp_session.rb

Overview

• extends: [EventEmitter]

The ‘CDPSession` instances are used to talk raw Chrome Devtools Protocol:

• protocol methods can be called with ‘session.send` method.

• protocol events can be subscribed to with ‘session.on` method.

Useful links:

• Documentation on DevTools Protocol can be found here: [DevTools Protocol Viewer](chromedevtools.github.io/devtools-protocol/).

• Getting Started with DevTools Protocol: github.com/aslushnikov/getting-started-with-cdp/blob/master/README.md

“‘js const client = await page.context().newCDPSession(page); await client.send(’Animation.enable’); client.on(‘Animation.animationCreated’, () => console.log(‘Animation created!’)); const response = await client.send(‘Animation.getPlaybackRate’); console.log(‘playback rate is ’ + response.playbackRate); await client.send(‘Animation.setPlaybackRate’,

playbackRate: response.playbackRate / 2

); “‘

“‘python async client = await page.context().new_cdp_session(page) await client.send(“animation.enable”) client.on(“animation.animation_created”, lambda: print(“animation created!”)) response = await client.send(“animation.get_playback_rate”) print(“playback rate is ” + response) await client.send(“animation.set_playback_rate”,

playback_rate: response["playback_rate"] / 2

) “‘

“‘python sync client = page.context().new_cdp_session(page) client.send(“animation.enable”) client.on(“animation.animation_created”, lambda: print(“animation created!”)) response = client.send(“animation.get_playback_rate”) print(“playback rate is ” + response) client.send(“animation.set_playback_rate”,

playback_rate: response["playback_rate"] / 2

) “‘

Instance Method Summary

• #detach ⇒ Object

  Detaches the CDPSession from the target.

• #send_message(method, params: nil) ⇒ Object

Methods inherited from PlaywrightApi

#==, #initialize, wrap

Constructor Details

This class inherits a constructor from Playwright::PlaywrightApi

Instance Method Details

#detach ⇒ Object

Detaches the CDPSession from the target. Once detached, the CDPSession object won’t emit any events and can’t be used to send messages.

Raises:

• (NotImplementedError)

# File 'lib/playwright_api/cdp_session.rb', line 51

def detach
  raise NotImplementedError.new('detach is not implemented yet.')
end

#send_message(method, params: nil) ⇒ Object

Raises:

• (NotImplementedError)

# File 'lib/playwright_api/cdp_session.rb', line 55

def send_message(method, params: nil)
  raise NotImplementedError.new('send_message is not implemented yet.')
end