Properties.js

var Point = /** @class */ (function () {
    function Point(_x, _y) {
        this._x = _x;
        this._y = _y;
    }
    Point.prototype.draw = function () {
        console.log("X: " + this._x + ", Y: " + this._y);
    };
    Point.prototype.getX = function () {
        return this.x;
    };
    Point.prototype.setX = function (value) {
        if (value < 0)
            throw new Error("value cannot be less than 0");
        this._x = value;
    };
    Object.defineProperty(Point.prototype, "x", {
        get: function () {
            return this._x;
        },
        set: function (value) {
            if (value < 0)
                throw new Error("value cannot be less than 0");
            this._x = value;
        },
        enumerable: false,
        configurable: true
    });
    return Point;
}());
var point = new Point(1, 2);
// let x = point.getX();
// point.setX(10);
var x = point.x;
point.x = 10;
point.draw();