CDPSession

• extends: [EventEmitter]

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

• protocol methods can be called with session.send_message method.
• protocol events can be subscribed to with session.on method.

Useful links:

• Documentation on DevTools Protocol can be found here: DevTools Protocol Viewer.
• Getting Started with DevTools Protocol: https://github.com/aslushnikov/getting-started-with-cdp/blob/master/README.md

client = page.context.new_cdp_session(page)
client.send_message('Animation.enable')
client.on('Animation.animationCreated', -> (_) { puts 'Animation Created' })
response = client.send_message('Animation.getPlaybackRate')
puts "Playback rate is #{response['playbackRate']}"
client.send_message(
  'Animation.setPlaybackRate',
  params: { playbackRate: response['playbackRate'] / 2.0 },
)

detach

def detach

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

send_message

def send_message(method, params: nil)