Missing ErrorEvent

[jimmywarting]

What is the problem this feature will solve?

Where trying to construct a new ErrorEvent... but it was defined.

What is the feature you are proposing to solve the problem?

A few web features can dispatch a ErrorEvent like web workers...

What alternatives have you considered?

No response

[bnoordhuis]

Node doesn't emit ErrorEvents itself so it's questionable if it makes sense to add it.

But... without working code it won't happen in the first place. Go ahead and open a pull request and see how it's received.

[jimmywarting]

As a effort into implementing spec'ed web worker (#43583) (which is highly desirable and upvoted) then the worker.onerror would have to emit a ErrorEvent.

I notice this when i tried to build a more spec comp. web worker.

[jimmywarting]

I have notice other events that Deno also has... here is a list of them: https://github.com/jimmywarting/missing-dom-events#compatibility-table

• CloseEvent: For when a WebbSocket closes.
• ErrorEvent: For when WebSocket fails and you also get this on globalThis.onerror

anyway undici have both of this event builtin, maybe it could just be a mater of just exposing those on the global scope?

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There is also a desire to make globalThis inherit EventTarget in some open issue here too. so it can dispatch/emit postMessages, ErrorEvents

[github-actions]

There has been no activity on this feature request for 5 months and it is unlikely to be implemented. It will be closed 6 months after the last non-automated comment.

For more information on how the project manages feature requests, please consult the feature request management document.

[regseb]

• CloseEvent: For when a WebbSocket closes.
• ErrorEvent: For when WebSocket fails and you also get this on globalThis.onerror

ErrorEvent isn't used by WebSocket. The error event of WebSocket returns a generic Event. Maybe only web workers use ErrorEvent.

Now that WebSocket is in Node.js v21 (behind the --experimental-websocket flag), I've opened an issue #50275 to add CloseEvent in Node.js.

[github-actions]

There has been no activity on this feature request for 5 months. To help maintain relevant open issues, please add the never-stale Mark issue so that it is never considered stale label or close this issue if it should be closed. If not, the issue will be automatically closed 6 months after the last non-automated comment.
For more information on how the project manages feature requests, please consult the feature request management document.

[KhafraDev]

WebSocket may use ErrorEvents, see the spec: https://html.spec.whatwg.org/multipage/indices.html#event-error