casting in javascript

console.log(10+"1"); //101   both will be string
console.log(10-"1"); //9     string will be taken as numberclass Person {
  constructor(obj) {
    obj && Object.assign(this, obj);
  }

  getFullName() {
    return `${this.lastName} ${this.firstName}`;
  }
}JavascriptExecutor js = (JavascriptExecutor) driver;  
js.executeScript(Script,Arguments);