VIP30/Ts-类/js/2_继承.js

var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
//继承： 类与类之间的继承
//A继承了B类，A叫子类，B叫父类
//一旦有的继承的关系 就会出现父子类
(function () {
    //定义一个类
    var Animal = /** @class */ (function () {
        function Animal() {
        }
        Animal.prototype.run = function (distance) {
            console.log("animal run " + distance);
        };
        return Animal;
    }());
    //继承
    var Dog = /** @class */ (function (_super) {
        __extends(Dog, _super);
        function Dog() {
            return _super !== null && _super.apply(this, arguments) || this;
        }
        Dog.prototype.cry = function () {
            console.log('wang wang!');
        };
        return Dog;
    }(Animal));
    var dog = new Dog();
    dog.cry();
    dog.run('100'); //可以调用从父中继承的方法
    //这里 dog是一个派生类 它派生自Animal的基类  通过extends 关键词
})();