this is a mutable object.

thisIsMutable.js

const obj = {
  name: "Mikita",
  setName: function(name) {
    this.name = name;
  },
  asyncName: function() {
    const { name } = this;
    setTimeout(() => {
      console.log("async", name);
      console.log("async2", this.name);
    }, 1000);
  }
};

console.log(obj.name);
obj.asyncName();
obj.setName("Vlad");
console.log(obj.name);