1class C4 {
2  constructor() {
3    //Uncaught TypeError: Cannot set property foo of #<C4> which has only a getter
4    this.foo = "test";
5  }
6  get foo() {}
7}
8
9let obj3 = new C4();

 1class C1 {
 2  constructor() {
 3    // Uncaught TypeError: Cannot set property foo of #<C2> which has only a getter
 4    this.foo = "test";
 5  }
 6}
 7
 8class C2 extends C1 {
 9  get foo() {}
10}
11
12let obj = new C2();