How to detect if webpack-dev-server is running?

Either:

const isDevServer = process.argv[1].indexOf('webpack-dev-server') !== -1;

or:

const isDevServer = process.argv.some(v => v.indexOf('webpack-dev-server') !== -1);

or:

const isDevServer = process.argv.some(v => v.includes('webpack-dev-server'));

I've been using the latter to a great effect. One configuration FTW!

Update: The environment variable is changed to WEBPACK_SERVE.

The webpack dev server will now set the WEBPACK_DEV_SERVER environment variable, allowing for a more robust way to check.

const isDevServer = process.env.WEBPACK_DEV_SERVER;

Related