This is a hint to the brower that the listener won't call preventDefault. In
theory, we should enforce this. But in practice, ignoring it should be ok.
Instead of taking a callback function, addEventListener can take an object
that exposes a `handleEvent` function. When used this way, `this` is
automatically bound. I don't think the current behavior is correct when
`handleEvent` is defined as a property (getter), but I couldn't figure out how
to make it work the way WPT expects, and it hopefully isn't a common usage
pattern.
Also added option support to removeEventListener.
Outputs in logfmt in release and a "pretty" print in debug mode. The format
along with the log level will become arguments to the binary at some point in
the future.
`checkVisibility` currently always return true. Also, when the visibility CSS
property is checked, always return 'visible'. This allows the playwright click
test to pass with a working getComputedStyle. It's also probably more accurate -
by default, most elements are probably visible. But it still isn't great.
Add named_get to CSSStyleDeclaration (allowing things like `style.display`).
This might not be specific to network notification, but the issue happens all
the time testing scenarios that rely on network notification, so it's hard
to ignore.
- Add 2 internal notifications
1 - http_request_start
2 - http_request_complete
- When Network.enable CDP message is received, browser context registers for
these 2 events (when Network.disable is called, it unregisters)
- On http_request_start, CDP will emit a Network.requestWillBeSent message.
This _does not_ include all the fields, but what we have appears to be enough
for puppeteer.waitForNetworkIdle.
- On http_request_complete, CDP will emit a Network.responseReceived message.
This _does not_ include all the fields, bu what we have appears to be enough
for puppeteer.waitForNetworkIdle.
We currently don't emit any other new events, including any network-specific
lifecycleEvent (i.e. Chrome will emit an networkIdle and networkAlmostIdle).
To support this, the following other things were done:
- CDP now has a `notification_arena` which is re-used between browser contexts.
Normally, CDP code runs based on a "cmd" which has its own message_arena, but
these notifications happen out-of-band, so we needed a new arena which is
valid for handling 1 notification.
- HTTP Client is notification-aware. The SessionState no longer includes the
*http.Client directly. It instead includes an http.RequestFactory which is
the combination fo the client + a specific configuration (i.e. *Notification).
This ensures that all requests made from that factory have the same settings.
- However, despite the above, _some_ requests do not appear to emit CDP events,
such as loading a <script src="X">. So the page still deals directly with the
*http.Client.
- Playwright and Puppeteer (but Playwright in particular) are very sensitive to
event ordering. These new events have introduced additional sensitivity.
The result sent to Page.navigate had to be moved to inside the navigate event
handler, which meant passing some cdp-specific data (the input.id) into the
NavigateOpts. This is the only way I found to keep both happy - the sequence
of events is closer (but still pretty far) from what Chrome does.
