Javascript 像普通子方法一样通过子对象访问父原型方法

function assignNonEnumerable(target, source) {
    Object.keys(source).forEach(function (key) {
        Object.defineProperty(target, key, {
            value: source[key],
            configurable: true,
            writable: true,
            enumerable: false, // This is the default, but showing it here for emphasis
        });
    });
}

function Wall() {
}

assignNonEnumerable(Wall.prototype, {
    shouldShowWall: function () {
        return true;
    },

    show: function () {
        console.log("show called");
        if (!this.shouldShowWall()) {
            return;
        }

        // Do other stuff here
    },
});

function OtherWall() {
    this.item = "my_tracking_id";
    this.minutes = 30;
    // If you want to bind it to the instance:
    this.shouldShowWall = this.shouldShowWall.bind(this);
}

OtherWall.prototype = Object.create(Wall.prototype);
assignNonEnumerable(OtherWall.prototype, {
    constructor: OtherWall,
    shouldShowWall: function () {
        // You can't bind the instance here, see the constructor above
        console.log("shouldShowWall called");
        return Math.random() < 0.5;
    },
});

new OtherWall().show();