How to check if js.Any value is a number in ScalaJS

Question

If you have a js.Any value, is there an easy way to check if it is a number?

(this question was originally asked in a crashing room and is being recorded here)

+3

scala.js

BenjaminJackman Jul 19 15 at 15:44

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1 answer

BenjaminJackman · Answer 1 · 2015-07-19T15:49:50+0000

This question raises 2 points.

js. Generally should be avoided. Prefer to use scala instead. Any
Anyway, if you are stuck with js.Any, somehow raise it to scala. Anyone then do the usual pattern matching:

def isNumber (x: js.Any): Boolean = {
  (x: Any) match {
     case x: Double => true
     case _ => false
  }
}