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Support CustomEvent #40678
Description
Activity
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on Feb 10, 2022 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.
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Yet another polyfill proposal that:
- handles no
options; - uses
nullfor the default value ofdetail; - define
detailreadonly.
class CustomEvent extends Event { #detail; constructor(type, options) { super(type, options); this.#detail = options?.detail ?? null; } get detail() { return this.#detail; } }
- handles no
For anyone wanting to work on this, the steps to take are:
- Enable the dom/events WPT tests in test/wpt
- Make them pass for regular Events/EventTargets
- Then start working on CustomEvent
W.r.t. (1):
diff --git a/test/wpt/status/dom/events.json b/test/wpt/status/dom/events.json new file mode 100644 index 00000000000..0967ef424bc --- /dev/null +++ b/test/wpt/status/dom/events.json @@ -0,0 +1 @@ +{} diff --git a/test/wpt/test-events.js b/test/wpt/test-events.js new file mode 100644 index 00000000000..5040d56d6a2 --- /dev/null +++ b/test/wpt/test-events.js @@ -0,0 +1,7 @@ +'use strict'; +require('../common'); +const { WPTRunner } = require('../common/wpt'); + +const runner = new WPTRunner('dom/events'); + +runner.runJsTests();
Where dom/events is https://github.com/web-platform-tests/wpt/tree/master/dom/events
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on Jun 22, 2022 10 remaining items
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on Aug 9, 2024
Is your feature request related to a problem? Please describe.
When trying to mimic browser APIs surrounding
EventTarget, we frequently useCustomEventwhich is currently unavailable in Node.It's useful in that it allows us to dispatch events through an
EventTargetand include a custom data payload.In a some way, this is the closest we have to a standardised
ObservableAPI (specificallySubject) and it's very useful.Describe the solution you'd like
CustomEventexistsDescribe alternatives you've considered
Writing a polyfill