The command "npm run build -- --prod" exited with code 1 error

Perform any of the following options as long as there is an error

For passing an argument to build command:

change 'npm run build -- --prod' to 'npm run build --prod' in the .csproj file
Open ClientApp folder and Update project angular-cli with this CMD command:

npm install --save-dev @angular/cli@latest
Update visual studio NodeJS and npm from:

Tools > Options > Projects and Solutions > Web Package Management > External Web Tools

If NodeJS and npm aren't installed on your environment path Add NodeJS and npm folder to the top of the list else move $(path) to the top of the list

enter image description here .

Thank @Praveen Kumar and @Yerkon

Got same error, my environment:

.NET Core 2.1 RC-1
Angular v5.2.4
NPM v5.7.1
Node v8.11.2

And nothing mentioned above did not helped. Simple go to ".\ClientApp" //Angula-CLI project and run

npm run build

then you will see real errors - so that means simple you have some errors in code, so fix angular UI code and it will build fine :).

Run:

npm run build:prod -- --prod

to see the actual error/errors that caused your build to fail.

Update: the new command is:

npm run build -- --configuration production

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