JavaScript Closures with Functions as Parameters. In this example you can see that work with closure. You can define a function and execute when pass the rules of the other function. In this example you can create a vehicle if the road previously exist.

closure-with-function-as-parameter.js

/**
 * Title: JavaScript Closures with Function as Parameter.
 *
 * Description: In this example you can see that work with closure. You can define
 *              a function and execute when pass the rules of the other function.
 *              In this example you can create a vehicle if the road previously exist.
 * 
 * More Info: https://developer.mozilla.org/es/docs/Web/JavaScript/Closures
 */

// Define Anonymous Function for encapsulate from Root Scope.
(function () {

  // Create Main Closure Function for Road Element.
  function road() {

    // Set default properties and values.
    let status = 'not exist';

    // Contructor for return all instance.
    function constructor () {
      return this;
    }

    // Function for check if can execute "func" param or not. If can execute it, a vehicle will be buy.
    this.control = function (func) {
      if (status === 'exist') return func; else throw Error('The road not exist and is required.');
    }

    // Toggle and Get Status Method.
    this.toggleStatus = function () {
      return status === 'not exist' ? status = 'exist' : status = 'not exist';
    }
    this.getStatus = function () {
      return status;
    }

    return constructor();
  }

  // Create Main Closure Function for Vehicle Element.
  function vehicle(road) {

    // Set default properties and values.
    let status = 'not buyed';

    // Contructor for return all instance.
    function constructor () {
      // When constructor is executed the vehicle status change to "buyed".
      this.toggleStatus();
      return this;
    }

    // Toggle and Get Status Door Methods.
    this.toggleStatus = function () {
      return status === 'not buyed' ? status = 'buyed' : status = 'not buyed';
    }
    this.getStatus = function () {
      return status;
    }

    // Control for that you can buy a vehicle only if the road exist.
    return road.control(constructor);
  }

  // Create Road Element.
  const roadA = road();
  /**
   * If you comment the follow line the road not exist, then the vehicle not can be created.
   */
  roadA.toggleStatus();
  
  try {
    // Show if exist or not the road.
    console.log('Exist the Road?:', roadA.getStatus());

    // Define Vehicle (A) with Vehicle Object.
    const vehicleA = vehicle(roadA)();

    // Get Status Vehicle when exist a road.
    console.log('Get status Vehicle:', vehicleA.getStatus());

    // Toggle and Get Status Vehicle method.
    console.log('Change status Vehicle:',vehicleA.toggleStatus());
    console.log('Get status Vehicle:', vehicleA.getStatus());
  } catch (err) {
    console.log(err.message);
  }
})();