How to set environment via ng serve in Angular 6

Question

I am trying to update my Angular 5 2 app to Angular 6  I successfully followed instructions in the Angular update guide  including the update of angular-cli to v6   and now I am trying to serve the app via  ng serve --env local   But this gives me error      Unknown option   --env    I use multiple environments  dev local prod   and this is the way it was working in Angular 5 2  How can I set the environment now in Angular 6

User · Answer

You can try  ng serve --configuration dev prod  To build use  ng build --prod --configuration dev  Hope you are using a different kind of environment

User · Answer

This answer seems good  however  it lead me towards an error as it resulted with  Configuration  xyz  could not be found in project     error in build  It is requierd not only to updated build configurations  but also serve  ones   So just to leave no confusions    --env is not supported in angular 6 --env got changed into --configuration    -c  and is now more powerful  to manage various envs  in addition to adding new environment file  it is now required to do some changes in angular json file    add new configuration in the build        build    configurations       property new build configuration may contain only fileReplacements part   but more options are available  add new configuration in the serve        serve    configurations       property new serve configuration shall contain of browserTarget  your-project-name build staging

User · Answer

You can use command ng serve -c dev for development environment                     ng serve -c prod for production environment  while building also same applies  You can use ng build -c dev for dev build

User · Answer

Angular no longer supports --env instead you have to use  ng serve -c dev   for development environment and    ng serve -c prod    for production   NOTE  -c or --configuration

User · Answer

Use this command for Angular 6 to build  ng build --prod --configuration dev

User · Answer

For Angular 2 - 5 refer the article Multiple Environment in angular  For Angular 6 use ng serve --configuration dev     Note  Refer the same article for angular 6 as well  But wherever you find --env instead use --configuration  That s works well for angular 6

User · Answer

You need to use the new configuration option  this works for ng build and ng serve as well   ng serve --configuration local   or  ng serve -c local   If you look at your angular json file  you ll see that you have finer control over settings for each configuration  aot  optimizer  environment files        configurations        production          optimization   true       outputHashing    all        sourceMap   false       extractCss   true       namedChunks   false       aot   true       extractLicenses   true       vendorChunk   false       buildOptimizer   true       fileReplacements                      replace    src environments environment ts            with    src environments environment prod ts                        You can get more info here for managing environment specific configurations    As pointed in the other response below  if you need to add a new  environment   you need to add a new configuration to the build task and  depending on your needs  to the serve and test tasks as well   Adding a new environment  Edit  To make it clear  file replacements must be specified in the build section  So if you want to use ng serve with a specific environment file  say dev2   you first need to modify the build section to add a new dev2 configuration    build         configurations              dev2                 fileReplacements                                  replace    src environments environment ts                  with    src environments environment dev2 ts                               You can add all other options here  such as aot  optimization                                 serviceWorker   true              Then modify your serve section to add a new configuration as well  pointing to the dev2 build configuration you just declared   serve          configurations              dev2                browserTarget    projectName build dev2              Then you can use ng serve -c dev2  which will use the dev2 config file

[angular] How to set environment via `ng serve` in Angular 6

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