casting in JS code example

Example 1: javascript casting objects

class Person {
  constructor(obj) {
    obj && Object.assign(this, obj);
  }

  getFullName() {
    return `${this.lastName} ${this.firstName}`;
  }
}

Example 2: casting in javascript

JavascriptExecutor js = (JavascriptExecutor) driver;  
js.executeScript(Script,Arguments);