Angular v8 - import 'web-animations-js' polyfill breaks the app

[robisim74]

🐞 Bug report

Command (mark with an x)

- [ ] new
- [x ] build
- [ ] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Is this a regression?

Yes, the previous version in which this bug was not present was Angular v7

Description

If I add import 'web-animations-js'; into polyfills.ts , in production it breaks the app.

🔬 Minimal Reproduction

• Create new project using @angular/cli 8.0.0-rc.4
• npm install --save web-animations-js
• Enable import 'web-animations-js'; into polyfills.ts
• ng build --prod
• Run the app, for example using http-server

🔥 Exception or Error

Uncaught TypeError: Cannot set property 'true' of undefined
    at Object.6dTf (polyfills-es2015.c4346c40f18bcedaacdd.js:1)
    at i (runtime-es2015.38622beb49066db5cb2b.js:1)
    at Module.hN/g (polyfills-es2015.c4346c40f18bcedaacdd.js:1)
    at i (runtime-es2015.38622beb49066db5cb2b.js:1)
    at Object.1 (polyfills-es2015.c4346c40f18bcedaacdd.js:1)
    at i (runtime-es2015.38622beb49066db5cb2b.js:1)
    at t (runtime-es2015.38622beb49066db5cb2b.js:1)
    at Array.r [as push] (runtime-es2015.38622beb49066db5cb2b.js:1)
    at polyfills-es2015.c4346c40f18bcedaacdd.js:1
Uncaught Error: In this configuration Angular requires Zone.js
    at new Aa (main-es2015.578a9f97ccae57b370de.js:1)
    at Ya.bootstrapModuleFactory (main-es2015.578a9f97ccae57b370de.js:1)
    at Module.zUnb (main-es2015.578a9f97ccae57b370de.js:1)
    at i (runtime-es2015.38622beb49066db5cb2b.js:1)
    at Object.0 (main-es2015.578a9f97ccae57b370de.js:1)
    at i (runtime-es2015.38622beb49066db5cb2b.js:1)
    at t (runtime-es2015.38622beb49066db5cb2b.js:1)
    at Array.r [as push] (runtime-es2015.38622beb49066db5cb2b.js:1)
    at main-es2015.578a9f97ccae57b370de.js:1

🌍 Your Environment

Angular CLI: 8.0.0-rc.4
Node: 10.14.2
OS: win32 x64
Angular: 8.0.0-rc.4
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.800.0-rc.4
@angular-devkit/build-angular     0.800.0-rc.4
@angular-devkit/build-optimizer   0.800.0-rc.4
@angular-devkit/build-webpack     0.800.0-rc.4
@angular-devkit/core              8.0.0-rc.4
@angular-devkit/schematics        8.0.0-rc.4
@ngtools/webpack                  8.0.0-rc.4
@schematics/angular               8.0.0-rc.4
@schematics/update                0.800.0-rc.4
rxjs                              6.4.0
typescript                        3.4.5
webpack                           4.30.0

Anything else relevant?

If I import zone before web-animation-js, the app works, but the first error is still present.

[alan-agius4]

Related to web-animations/web-animations-js#45 (comment)