Set a process.env to see if webpack-dev-server was used

[donaldpipowitch]

• Operating System: Mac OS
• Node Version: 8 LTS
• NPM Version: I use yarn
• webpack Version: 4
• webpack-dev-server Version: 3.1.9

• This is a bug
• This is a modification request

Code

Old WEBPACK_SERVE usage in our config.

For Features; What is the motivation and/or use-case for the feature?

I try to migrate to this package from webpack-serve. We previously used process.env.WEBPACK_SERVE to see, if a project asks for a watch config or not. We'd like to keep a similar functionality without having every project to do add a process env on their own, before they call webpack-dev-serve. Maybe there could be a process.env.WEBPACK_DEV_SERVER flag.

https://github.com/webpack-contrib/webpack-serve#setting-the-config-mode

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FYI: This template says " Please note that we are NOT accepting FEATURE requests at this time." while in https://github.com/webpack-contrib/webpack-serve it's said "Please use webpack-dev-server (he is in support and update mode again). Feel free to create a issue if some features are not implemented in webpack-dev-server." ⚠

[alexander-akait]

@donaldpipowitch PR welcome