dynamic.js

function Model(msg){
	this.message = msg;
}
r.Inheritor(Model, r.Observer);
let mp = Model.prototype;
mp.change = function(msg) {
	this.message = msg;
	this.emit("valchange");
}
mp.model = function() {
	let that = this;
	return {
		message: that.message
	}
}

let model = new Model("Hello!"),
		helloworld = new Vue({
			el: "#app",
			data: model.model()
		});

let dynModel = new Model("(dyn) Hello!"),
		dynhelloworld = new Vue({
			el: "#app2",
			data: dynModel.model()
		});
dynModel.on("valchange", () => {
	dynhelloworld.message = dynModel.model().message;
})

setTimeout(() => {
	dynModel.change("World!");
}, 2000);