Vérité
Par Gilsoub le 08/10/2015, 05:05 - Lien permanent
La vérité si je mens, Babel c’est bien ! Agade ce simple code en ES6 :
'use strict'; class Vehicle { constructor(brand) { this.brand = brand; } } class Car extends Vehicle { constructor(brand,model) { super('Mercedes'); this.model = model; } } let myCar = new Car('Mercedes','300SL'); console.log(myCar);
Converti en version 5 par Babel :
'use strict'; var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } }; function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var Vehicle = function Vehicle(brand) { _classCallCheck(this, Vehicle); this.brand = brand; }; var Car = (function (_Vehicle) { _inherits(Car, _Vehicle); function Car(brand, model) { _classCallCheck(this, Car); _get(Object.getPrototypeOf(Car.prototype), 'constructor', this).call(this, 'Mercedes'); this.model = model; } return Car; })(Vehicle); var myCar = new Car('Mercedes', '300SL'); console.log(myCar);
Y’a pas photo !