cancelable referenced in Polymer.Base API docs

[apowers313]

The Polymer Base API fire() method makes reference to an event being cancelable. It appears that it has been killed off a few times (1 2 3), but I believed the docs and tried to use it... As mentioned elsewhere, it doesn't work. I'm happy to provide a test case if it needs further confirmation.

[apowers313]

cancelable also now appears in the Utility functions page.

[arthurevans]

The bugs that you point to discuss cancelBubble, a long-gone Polymer event property, which as far as I can tell is not related to cancelable, which is a standard even property and determines whether you can preventDefault.

The code just passes this flag to the standard CustomEvent constructor:
https://github.com/Polymer/polymer/blob/453cae589a1d82331ade1ed53965d7819694eecb/src/standard/utils.html#L162

Do you have a simple reproduction case for what you're seeing?

[arthurevans]

Ping? Can you provide a repro case here?