Method constructor

tests/test_code/js/classes/classes.js:6–12

(height, width)

class Rectangle {
  constructor(height, width) {
    this.height = height;
    this.width = width;
    this.i = 0;
    print_hi();
    this.calcArea()
  }
  calcArea() {
    this.incr();
    return this.height * this.width