is-explicit/lib/is-subclass-of.js

Combines instance of operator and typeof operator in a way that works seamlessly with objects and literals.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _is = _interopRequireWildcard(require("./is"));

var _isInstanceable = _interopRequireDefault(require("./is-instanceable"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

/******************************************************************************/
// Prototype Test

/******************************************************************************/
function isConstructorOrInstanceOf(prototype, type) {
  return prototype.constructor === type || prototype instanceof type;
}
/******************************************************************************/
// Main

/******************************************************************************/


function isSubclassOf(value, type) {
  if (this != null && this !== _is.default) type = this;
  const arrayOfTypes = Array.isArray(type);
  if (!(0, _is.typeIsValid)(type, arrayOfTypes)) throw new Error('is.subclassOf requires at least one type.');
  if (!(0, _isInstanceable.default)(value)) return false;
  const {
    prototype
  } = value;
  if (!arrayOfTypes) return isConstructorOrInstanceOf(prototype, type);

  for (const t of type) if (isConstructorOrInstanceOf(prototype, t)) return true;

  return false;
}
/******************************************************************************/
// Exports

/******************************************************************************/


var _default = isSubclassOf;
exports.default = _default;