"Cannot set property once" error when used with zone.js

[vigie]

Description

When used with zone.js (all Angular applications), following error is thrown:

zone.js:1953 Uncaught TypeError: Cannot set property once of [object Object] which has only a getter
    at HTMLDivElement.addEventListener (zone.js:1953:42)
    at webcomponents-bundle.js:98:596
    at webcomponents-bundle.js:98:767
    at webcomponents-bundle.js:382:176

Steps to reproduce

Generate an Angular app and include this polyfill. Start the app.

I've verified that adding a once setter removes the error.

Expected behavior

Should not throw error

Actual behavior

Above error is thrown

Version

This was introduced in version 2.7 by this PR #469

Browsers affected

Only tested on Chrome

[mohit-sahore]

I am facing the same issue for the last 5 days. Any update on this?

[inspector-code]

The same problem. Are there any solutions?

[tappmax]

I have the same issue. Is this the problem here? https://github.com/webcomponents/polyfills/blob/master/packages/webcomponentsjs/ts_src/platform/event-listener-options.ts#L26

[tappmax]

Unfortunately, my current solution to this is to use the previous minor version.

[marlberm2014]

@tappmax downgrading to 2.6 also works for me. Hopefully this is fix in the next releases.

[mme-private]

Can confirm, problem is still actual.

[iamnaumovnikita]

Still actual

[Volftsun]

Same here, the bug still actual