blue•2mo ago

error: Uncaught TypeError: Cannot set properties of undefined (setting 'target')

Hey, I get this whilst starting my app with Deno:

error: Uncaught TypeError: Cannot set properties of undefined (setting 'target')
    at setTarget (ext:deno_web/02_event.js:97:29)
    at dispatchEvent (ext:deno_web/02_event.js:1055:7)
    at dispatchBeforeUnloadEvent (ext:runtime_main/js/99_main.js:466:22)

error: Uncaught TypeError: Cannot set properties of undefined (setting 'target')
    at setTarget (ext:deno_web/02_event.js:97:29)
    at dispatchEvent (ext:deno_web/02_event.js:1055:7)
    at dispatchBeforeUnloadEvent (ext:runtime_main/js/99_main.js:466:22)

What would be the best way to go about debugging it?

6 Replies

Leokuma•2mo ago

One way is running your app with deno run --inspect-wait, attaching chrome debugger to it and advancing step by step. You can also set a breakpoint right before the part you suspect is malfunctioning My answer was maybe too brief. Let us know if you need more instructions or alternatives

blueOP•2mo ago

Hey, thank you for your answer. Unfortunately, when I run the debugger, it works perfectly. It only fails when I don't. Do you see the error on your end? Reproduction -> git clone https://github.com/primate-run/apps && cd apps/apps/angular && deno install && deno run -A npm:primate test I think it's related to something in Angular, but I'm not sure how to go about debugging it. The other apps pass the tests successfully, and the Angular app passes in Node and Bun, so it might be some combination of Deno and Angular.

Leokuma•2mo ago

Yes I get the same error here on Linux. I don't know how to fix it 😔. I don't use Deno for frontend dev

blueOP•2mo ago

Thanks for looking!

marvinh.•2mo ago

The best course of action to get this resolved is to file an issue here https://github.com/denoland/deno/issues

blueOP•2mo ago

https://github.com/denoland/deno/issues/30953

error: Uncaught TypeError: Cannot set properties of undefined (setting 'target')

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