ecmascript 6 how to call a static class methode by reflection

Question

So I would like to call an es 6 static class method By reflection using a string className and a string method name. I have tried several ways. unfortunately I don’t seem to find the correct way to do this.

By the way (as mentioned in the comments below) I am looking for a solution where I will get the name of the class and the name of the method from dom attributes so they need to be a string.

Can anybody help?

class a{
 static b(nr){
   alert('and the answer is' + nr)
  }
}

let aClassName = 'a',
  aMethodeName = 'b',
    theCompleteCall = 'a.b',
    anArgument = 42;

//Reflect.apply(theCompleteCall,anArgument);
//window[aClassName][aMethodeName](anArgument);
//window[theCompleteCall](anArgument);

score 3 · Accepted Answer · answered Feb 01 '18 at 09:15

Because of the fact that let and class not being declared in a global scope as you'd expect (read more), you need to declare your class in a scope accessible, like so:

window.a = class a{
    static b(nr){
    alert('and the answer is' + nr)
  }
}

let aClassName = 'a',
        aMethodeName = 'b',
    theCompleteCall = 'a.b',
    anArgument = 42;

Then, you can call with reflection, like so:

window[aClassName][aMethodeName](anArgument)

So, the solution, is to provide a scope when declaring them, and access them through that scope.

score -2 · Answer 2 · answered Feb 01 '18 at 09:10

-2

You're setting your variables to strings instead of the reference to your objects.

answered Feb 01 '18 at 09:10

hdennen

57
8

yes that is true and that is just the problem i like to solve I will get the strings for attributes out of my dom I'll edit my question to make this more clear thanks – J.V. Feb 01 '18 at 09:11

ecmascript 6 how to call a static class methode by reflection

2 Answers2