deobfuscated.js

(function () {
  class c {
    constructor(d) {
      this.target = d;
    }
    greet() {
      console.log("Hello " + this.target);
    }
    setTarget(e) {
      this.target = e;
    }
  }
  const f = new c("world");
  f.greet();
  f.setTarget("reader");
  f.greet();
}());