Class: Playwright::Worker

Inherits:
PlaywrightApi show all
Defined in:
lib/playwright_api/worker.rb

Overview

The Worker class represents a [WebWorker](developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API). worker event is emitted on the page object to signal a worker creation. close event is emitted on the worker object when the worker is gone.

“‘py def handle_worker(worker):

print("worker created: " + worker.url)
worker.on("close", lambda: print("worker destroyed: " + worker.url))

page.on(‘worker’, handle_worker)

print(“current workers:”) for worker in page.workers:

print("    " + worker.url)

“‘

Instance Method Summary collapse

Methods inherited from PlaywrightApi

#initialize, unwrap, wrap

Constructor Details

This class inherits a constructor from Playwright::PlaywrightApi

Instance Method Details

#evaluate(expression, arg: nil) ⇒ Object

Returns the return value of expression.

If the function passed to the [‘method: Worker.evaluate`] returns a [Promise], then [`method: Worker.evaluate`] would wait for the promise to resolve and return its value.

If the function passed to the [‘method: Worker.evaluate`] returns a non- value, then

‘method: Worker.evaluate`

returns undefined. Playwright also supports transferring some additional values that are

not serializable by JSON: -0, NaN, Infinity, -Infinity.

Raises:

  • (NotImplementedError) 


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# File 'lib/playwright_api/worker.rb', line 27

def evaluate(expression, arg: nil)
  raise NotImplementedError.new('evaluate is not implemented yet.')
end

#evaluate_handle(expression, arg: nil) ⇒ Object

Returns the return value of expression as a JSHandle.

The only difference between [‘method: Worker.evaluate`] and [`method: Worker.evaluateHandle`] is that

‘method: Worker.evaluateHandle`

returns JSHandle.

If the function passed to the [‘method: Worker.evaluateHandle`] returns a [Promise], then

‘method: Worker.evaluateHandle`

would wait for the promise to resolve and return its value.

Raises:

  • (NotImplementedError) 


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# File 'lib/playwright_api/worker.rb', line 38

def evaluate_handle(expression, arg: nil)
  raise NotImplementedError.new('evaluate_handle is not implemented yet.')
end

#off(event, callback) ⇒ Object

– inherited from EventEmitter –



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# File 'lib/playwright_api/worker.rb', line 60

def off(event, callback)
  event_emitter_proxy.off(event, callback)
end

#on(event, callback) ⇒ Object

– inherited from EventEmitter –



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# File 'lib/playwright_api/worker.rb', line 54

def on(event, callback)
  event_emitter_proxy.on(event, callback)
end

#once(event, callback) ⇒ Object

– inherited from EventEmitter –



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# File 'lib/playwright_api/worker.rb', line 48

def once(event, callback)
  event_emitter_proxy.once(event, callback)
end

#url ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/playwright_api/worker.rb', line 42

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