Re: [webcomponents] Closed flag proposal breaks ability to audit and automate tests of web pages (#354)

The problem is a limitation with all common end-to-end testing frameworks - you cannot determine the order in which your injected JavaScript will execute because you are testing across process boundaries.

The problem with that code is that you have to execute it on every node in the document - this is a very expensive problem for auditing which can lead to it not being practical to use.

btw - are you thinking of answering the questions on the need for this feature?

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https://github.com/w3c/webcomponents/issues/354#issuecomment-162768665