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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Zone.js does not properly handle AbortSignal in addEventListener","articleBody":"### Which @angular/* package(s) are the source of the bug?\n\nzone.js\n\n### Is this a regression?\n\nNo\n\n### Description\n\nZone.js tries to be clever and creates a single handler for all listeners to the same event on the same target that have the same `capture` setting.\r\n\r\nHowever, with the somewhat recent addition of the `signal` setting, this means that handlers can improperly registered, consider the following two tests:\r\n\r\n```javascript\r\nconst controller = new AbortController();\r\nwindow.addEventListener('myEvent', () =\u003e console.log('expected'));\r\nwindow.addEventListener('myEvent', () =\u003e console.log('unexpected'), {signal: controller.signal});\r\ncontroller.abort();\r\nwindow.dispatchEvent(new Event('myEvent'));\r\n// LOG: 'expected'\r\n// LOG: 'unexpected'\r\n```\r\n\r\n```javascript\r\nconst controller = new AbortController();\r\nwindow.addEventListener('myEvent', () =\u003e console.log('unexpected'), {signal: controller.signal});\r\nwindow.addEventListener('myEvent', () =\u003e console.log('expected'));\r\ncontroller.abort();\r\nwindow.dispatchEvent(new Event('myEvent'));\r\n// nothing logs\r\n```\r\n\r\nIf zone.js is not installed, only `'expected'` is logged in each case.\n\n### Please provide a link to a minimal reproduction of the bug\n\n_No response_\n\n### Please provide the exception or error you saw\n\n_No response_\n\n### Please provide the environment you discovered this bug in (run `ng version`)\n\n_No response_\n\n### Anything else?\n\n_No response_","author":{"url":"https://github.com/DavidANeil","@type":"Person","name":"DavidANeil"},"datePublished":"2023-03-25T09:29:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/49591/angular/issues/49591"}