[Feature] CDPSessions for Web Workers

[iustinpericica]

I need to create CDP Sessions to Web Workers available in a page. I've seen that you currently support only instances of Page and Frames.

I've seen you already collect Web Workers using Target.attachedToTarget

playwright/packages/playwright-core/src/server/chromium/crPage.ts

Line 744 in e6d8cf9

this._page._addWorker(event.sessionId, worker);

that returns the sessionId needed to send CDP requests to a specific target.

playwright/packages/playwright-core/src/server/chromium/crConnection.ts

Line 175 in e6d8cf9

const id = this._connection._rawSend(this._sessionId, method, params);

Do you consider adding support for CDP Connection to Web Workers?
If not, is there a way to send from client raw commands to CDP ( sessionId, method, params ) so maybe I can collect sessionIds separetly and then make use of existing CDP Connection of Playwright.

Thanks!

[pavelfeldman]

There are no such plans. What is your use case?

[iustinpericica]

I need to take coverage from all Targets available in a web app ( all pages and web workers ).

To take coverage from pages I use existing Playwright CDP Sessions to send CDP Commands.

If you consider CDP Sessions on Web workers a good feature, I can try to open a PR on that.

[pavelfeldman]

I don't think we want to see more of CDP exposed on top of what we have. Your problem is also tricky in a sense that workers are dynamic, they come and go, so the problem of tracking the coverage of everything is quite tricky to solve.

[pavelfeldman]

I'll close it as out of scope for Playwright.