Is there any way to make a function's return accessible via a property?

Question

I\'m a JS dev, experimenting with functional programming ideas, and I\'m wondering if there\'s anyway to use chains for synchronous functions in the way the promise chains are w

Answer 1

You can set square and num as a property of square call`

function square (num) {

  if (!this.square) {
    this.square = square;
    this.num = num || 0;
  };
  
  if (num === undefined) {
    this.num *= this.num
  }
  else if (!isNaN(num)) {  
   this.num *= num;
  };
  return this;
  
}

let foo = 2;
let c = new square(foo).square().square();
console.log(c.num);