Error during prod build in Angular Cli

[cv-gh]

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Versions.

Repro steps.

The log given by the failure.

94% asset optimization(node:11160) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): SyntaxError: Unexpected token: operator (>)
(node:11160) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Desired functionality.

Mention any other details that might be useful.

I can do normal build only build in prod fails with above error.
greatly appreciate help here.
While I have read the Promise Then and Catch - I have followed the pattern in my source code every where but exact issue is missing and I cant really build anymore.

[umarkashmiri]

I am getting the same here. Here is the version detail

and TSCONFIG

[ilianiv]

Same here with @angular/cli@1.4.2

94% asset optimization(node:20368) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): SyntaxError: Unexpected token: name (f)

[thekhoi]

I got this error when I included a script file inside the angular-cli.json written in es6. I converted it to es5 by change 'let' back to 'var' and removing arrow functions.

[mistory]

Im getting this error when i run ng build --prod

 95% emittingUnhandled rejection Error: ENOENT: no such file or directory, open
'C:\Users\story\pro\ng-app\node_modules\_@angular_core@4.4.3@@angular\packa
ge.json'

The version is:

@angular/cli: 1.4.2
node: 7.10.0
os: win32 x64
@angular/animations: 4.4.3
@angular/common: 4.4.3
@angular/compiler: 4.4.3
@angular/core: 4.4.3
@angular/forms: 4.4.3
@angular/http: 4.4.3
@angular/platform-browser: 4.4.3
@angular/platform-browser-dynamic: 4.4.3
@angular/router: 4.4.3
@angular/cli: 1.4.2
@angular/compiler-cli: 4.4.3
@angular/language-service: 4.4.3
typescript: 2.3.4

[ilianiv]

@thekhoi you are right. I've got a custom script included in .angular-cli.json written in es6. Transpiling to es5 fixed the issue with SyntaxError: Unexpected token: name (f) when building with -prod flag

[umarkashmiri]

Yes, one thing is confirmed, this is due to external scripts. I am using bootstrap 4 in my project and it has a dependency on popper.min.js and it is based on es6. I changed my "target": "es2016", in my tsconfig file and it's working now besides a few warnings, still figuring out how to get rid of them.

[umarkashmiri]

updating to es2016 was still messing up with some of my other libraries and it was not suitable. so what I did, I installed popper.js separately via npm and used umd version which is compatible with es5, and changed the target to es5 again in tsconfig and it solved my problem.

[rodolfojnn]

Same here. I also use Bootstrap 4 and Pooper.js.

@angular/cli: 1.4.3
node: 7.5.0
os: win32 x64
@angular/animations: 4.3.2
@angular/common: 4.3.2
@angular/compiler: 4.3.2
@angular/compiler-cli: 4.3.2
@angular/core: 4.3.2
@angular/forms: 4.3.2
@angular/http: 4.3.2
@angular/platform-browser: 4.3.2
@angular/platform-browser-dynamic: 4.3.2
@angular/platform-server: 4.3.2
@angular/router: 4.3.2
@angular/cli: 1.4.3
typescript: 2.3.4

.angular-cli.json

...
"scripts": [
    "../node_modules/popper.js/dist/umd/popper.min.js",
    "../node_modules/bootstrap/dist/js/bootstrap.min.js",
  ],
...

[DmytroPotapov]

@thekhoi

I got this error when I included a script file inside the angular-cli.json written in es6. I converted it to es5 by change 'let' back to 'var' and removing arrow functions.

Thanks, it restore production build for me

[hiepxanh]

@chetanvaja did you resolve this issue sir ? can you close this if you finished ?

[Justin-wei]

Hello,

It is still not work with version 1.4.9, any workaround?

Thanks