Scala.js: Support running tests in Node 17

[davesmith00000]

Node 17 prevented Scala.js versions prior to 1.8.0 from running tests in sbt without a workaround or adding a support library. This was fixed in Scala.js 1.8.0 (presumably in the sbt plugin).

Details of the issue are here: scala-js/scala-js-js-envs#12

Under Mill, using Scala.js 1.8.0 does not resolve the problem, and the following workaround is required:

  object test extends Tests {
    ...
    override def jsEnvConfig = T(JsEnvConfig.NodeJs(args = List("--dns-result-order=ipv4first")))
  }

Otherwise you see an error similar to:

Scala.js Com failed: Error: connect ECONNREFUSED

[davesmith00000]

Excellent! Thanks all! 😄