Output: class field arrow method vs prototype method, each extracted and called standalone

1class Button {
2  label = 'ok';
3  arrow = () => this.label;
4  proto() {
5    return this === undefined ? 'no this' : this.label;
6  }
7}
8const b = new Button();
9const { arrow, proto } = b;
10console.log(arrow());
11console.log(proto());
12console.log(b.proto());
13console.log(Object.hasOwn(b, 'arrow'), Object.hasOwn(b, 'proto'));