What do these two setTimeout callbacks log for this.label?

var label = "window";
 
const timer = {
  label: "timer",
  start() {
    setTimeout(function () {
      console.log("function:", this.label);
    }, 0);
    setTimeout(() => {
      console.log("arrow:", this.label);
    }, 0);
  },
};
 
timer.start();