Do we have a document or example on how to use some events like Network.responseReceived...

[phileba]

Do we have a document or example on how to use some event likes

Network.requestWillBeSent
Network.requestIntercepted
Network.responseReceived
Network.loadingFinished
Network.loadingFailed

[mxschmitt]

Since these are normal CDP events, you can use the CDP documentation: https://chromedevtools.github.io/devtools-protocol/tot/Network/#event-loadingFailed

And our CDP example (client.on): https://playwright.dev/#version=v1.1.1&path=docs%2Fapi.md&q=class-cdpsession

[pavelfeldman]

Overall, Playwright discourages the direct use of CDP. Our goal is to be vendor independent while CDP limits your tests to Chromium only.

It is useful for us to know when something is missing in the Playwright API so that we could expose it universally for all the browsers. Could you share what you are trying to do? Events that you lost all bubble up through the Playwright API...

[phileba]

Overall, Playwright discourages the direct use of CDP. Our goal is to be vendor-independent while CDP limits your tests to Chromium only.

It is useful for us to know when something is missing in the Playwright API so that we could expose it universally for all the browsers. Could you share what you are trying to do? Events that you lost all bubble up through the Playwright API...

I'm trying to port my existing project which written by puppeteer to playwright so I need to do some code transformation cause the difference.

[aslushnikov]

I'm trying to port my existing project which written by puppeteer to playwright so I need to do some code transformation cause the difference.

@phileba Interesting! Did you rely on CDP in your puppeteer project as well?

[shirshak55]

can we do something like await the promise if we receive json file which url matches with regex? Personally I do it with Network.responseReceived. Page.waitForResponse didn't worked in puppeteer last time i used..

Most of the time while working i must rely on cdp like working on websockets etc :(

[aslushnikov]

Most of the time while working i must rely on cdp like working on websockets etc :(

@shirshak55 WebSockets are missing indeed - I created a separate FR to track the progress there. Is there anything else that's missing?

Page.waitForResponse didn't worked in puppeteer last time i used..

@shirshak55 chances are, it works in Playwright! I'd highly recommend trying it out. If something doesn't work indeed, please let us know - we'd be happy to fix it.

[phileba]

Did you rely on CDP in your puppeteer project as well?

yep, there are some places which I'm using CDP and 1 of them is #2704

[pavelfeldman]

@phileba : https://chromedevtools.github.io/devtools-protocol/ is the best source of info on CDP. You have a CDP sessions, so you can enable agents and communicate with the browser. Explaining how to work with CDP is outside of the scope of Playwright, so sadly you are on ypur own there. I will comment on your hightlight bug separately!