Class: Playwright::Worker
- Inherits:
-
PlaywrightApi
- Object
- PlaywrightApi
- Playwright::Worker
- 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
- #context=(req) ⇒ Object
-
#evaluate(expression, arg: nil) ⇒ Object
Returns the return value of `expression`.
-
#evaluate_handle(expression, arg: nil) ⇒ Object
Returns the return value of `expression` as a `JSHandle`.
-
#off(event, callback) ⇒ Object
– inherited from EventEmitter –.
-
#on(event, callback) ⇒ Object
– inherited from EventEmitter –.
-
#once(event, callback) ⇒ Object
– inherited from EventEmitter –.
- #page=(req) ⇒ Object
- #url ⇒ Object
Methods inherited from PlaywrightApi
Constructor Details
This class inherits a constructor from Playwright::PlaywrightApi
Instance Method Details
#context=(req) ⇒ Object
47 48 49 |
# File 'lib/playwright_api/worker.rb', line 47 def context=(req) wrap_impl(@impl.context=(unwrap_impl(req))) end |
#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`.
27 28 29 |
# File 'lib/playwright_api/worker.rb', line 27 def evaluate(expression, arg: nil) wrap_impl(@impl.evaluate(unwrap_impl(expression), arg: unwrap_impl(arg))) 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.
38 39 40 |
# File 'lib/playwright_api/worker.rb', line 38 def evaluate_handle(expression, arg: nil) wrap_impl(@impl.evaluate_handle(unwrap_impl(expression), arg: unwrap_impl(arg))) end |
#off(event, callback) ⇒ Object
– inherited from EventEmitter –
70 71 72 |
# File 'lib/playwright_api/worker.rb', line 70 def off(event, callback) event_emitter_proxy.off(event, callback) end |
#on(event, callback) ⇒ Object
– inherited from EventEmitter –
64 65 66 |
# File 'lib/playwright_api/worker.rb', line 64 def on(event, callback) event_emitter_proxy.on(event, callback) end |
#once(event, callback) ⇒ Object
– inherited from EventEmitter –
58 59 60 |
# File 'lib/playwright_api/worker.rb', line 58 def once(event, callback) event_emitter_proxy.once(event, callback) end |
#page=(req) ⇒ Object
52 53 54 |
# File 'lib/playwright_api/worker.rb', line 52 def page=(req) wrap_impl(@impl.page=(unwrap_impl(req))) end |
#url ⇒ Object
42 43 44 |
# File 'lib/playwright_api/worker.rb', line 42 def url wrap_impl(@impl.url) end |