Uncaught TypeError: undefined is not a function

[roweldeguzman]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ x] Bug report 
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question

Current behavior

Minimal reproduction of the problem with instructions

Just create a new app using CLI ang then run ng build

Environment

Production
Angular version: 4.2.4

Browser:
- [ ] Chrome (desktop) version XX
- [x ] Chrome (Android) version 39.0.2171.93
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX

For Tooling issues:
- Node version: 6.11.3
- Platform:  Linux

[alexzuza]

Hello!

I create new app using CLI every day and it works for me. If it doesn't work for you you should at least provide us reproduction. Your screenshot doesn't help us to understand what's the reason of it.

[roweldeguzman]

Hi @alexzuza, did you use the environment I provided?

[roweldeguzman]

@alexzuza it actually working from chrome version 45-latest in android, lower than version 45 then it produce error. sorry for not mentioning earlier.

[trotyl]

Line 3084 is:

return options.reduce(function (merged, opt) { return (Object.assign({}, merged, opt)); }, {});

Please have a look of https://angular.io/guide/browser-support first and have a search of Object.assign in this repo.

Mark for better linking: #16286, #18588. (There're well-explained description)

_{Can be closed as duplicate of more than dozens of other issues.}

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