static properties are undefined

[tobiasmuecksch]

Hey there,

I tried the following snippet:

class Car {
  startEngine() {
    console.log("Engine started!");
  }
}

class Ferraro extends Car {
  static myStaticProp = 21;

  logStatic() {
    console.log(this.myStaticProp);
  }
}



var car1 = new Ferraro();
car1.logStatic();

I compiled it via babel with es2015 and stage-0. When I run the resulting code, the last line echoes undefined.

[dozoisch]

What happens if you do Ferraro.myStaticProp instead. I don't think static are accessible from the instance directly.

[tobiasmuecksch]

@dozoisch Well, that is contradictory to the static properties one might be used to in other languages like Java.

I can't think of any case this bug/feature might be useful.

[Marsup]

This is exactly like that in C# and C++, maybe Java is the exception and not the norm.

[tobiasmuecksch]

@Marsup Thank you for the clarification. Sometimes one is tempted to believe Java is the overall standard 😐