keyword super in babel and typescript

super-in-babel-typescript.js

"use strict";

class Point {
  getX() {
    console.log(this.x); // C
  }
}

class ColorPoint extends Point {
  constructor() {
    super();
    this.x = 2;
    super.x = 3;
    console.log(this.x)   // A
    console.log(super.x)  // B
  }
  
  m() {
    this.getX()
  }
}

const cp = new ColorPoint();
cp.m();

super-in-babel-typescript.md

	A	B	C
Chrome	3	undefined	3
babel	2	undefined	2
TypeScript	2	3	2

• Chrome 58.0.3029.110 64bit (V8 5.8.283.38)
• Babel Repl 6.24.2
• TypeScript 2.3