Angular 4, Unexpected token: name (Subject) during ng build --prod

[oguzkurtcuoglu]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [ ] feature request

I have a Angular 4 application.

I can successfully build the project with ng build

But, when I run ng build --prod error is thrown.

When I did some research, I saw uglifyjs not working with es6 and I changed target to es5 in my tsconfig file.

But I keep getting this error.

I don't understand what is wrong.

Versions.

Repro steps.

1. Run this command: ng build --prod

The log given by the failure.

ERROR in vendor.4008cf7dff2b98412878.bundle.js from UglifyJs Unexpected token: name (Subject) [vendor.4008cf7dff2b98412878.bundle.js:19471,6]

Desired functionality.

The build should finish without an error

Mention any other details that might be useful.

[hiepxanh]

first

ng build --prod --sm

to detect the error
second
check the 3th libs causing problem

[oguzkurtcuoglu]

@hiepxanh thank you for answer.
I used this "aspnet/signalr-client" package. I unistalled package from my application and problem is solved.

[hiepxanh]

it a good news,sir.
Please close your issue if your problem is solved sir.
Have a good day :)

[oguzkurtcuoglu]

Thank you again :)
Now, I will close issue. My problem is solved.

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