ES Class constructor spread operator arguments

demo.js

//Let's create some arguments as functions
let message = () => "hello"
let content = () => "world"
let text = () => "lorem"

//Let's change the function internal name value...
Object.defineProperty(text, "name", {writable:true});
text.name = "book"

//Now we create a class
//Arguments needs to be a function with a name and a return value.
class SmartClass {
  //Use spread to catch every arguments...
  constructor(...stuff) {
  	console.log(stuff) // 0 indexed array with our functions as value
    console.log(arguments) // Object
    this.what = Object.entries(arguments).map(([key, arg], i) => this[arg.name] = arg())
  }
   logArgs (){
     console.log(this.message) // "Hello"
     console.log(this.content) // "World"
     console.log(this.text) // undefined
     console.log(this.book) // "lorem"
     console.log(this.what) // ["hello", "world", "lorem"]
  }
}

let smart = new SmartClass(message, content, text)
smart.logArgs()

Thanks. I was looking for a way to use spread to copy the properties from an object passed in to a constructor to this. Seems it is not possible to do that. Your line 17 made me think maybe this.what was some kind of magic javascript property that would allow me to assign to it using spread and have all the properties from the object magically get added to the prototype of this. Your line 17 would be less complicated if that were possible, you could then just write this.what = ...stuff. I was hoping for something like this = {...this, ...stuff} but doesn't work because you cannot assign to this.