JSFiddle - React, Tailwind, and code Playground

HTML

<body>
</body>

JavaScript

//model
 var Thing = Backbone.Model.extend({
 });
 
 //view
 var ThingView = Backbone.View.extend({
     el: $('body'),
     template: _.template('<h3><%= title %></h3> <a href="#/posts/<%= id %>">Post <%= id %></a>'),
     
     render: function(){
         var attributes = this.model.toJSON();
         this.$el.append(this.template(attributes));
         console.log(attributes);
     }
 });

  var DetailView = Backbone.View.extend({
     el: $('body'),
     template: _.template('this is detailview for <br><%= id %> <br>price <%= price %> <a href="index.htm">back</a>'),

     
     render: function(id){
         var attributes = this.model.toJSON();
         this.$el.append(this.template(attributes));
         console.log(attributes);
     }
 });

//collection
var ThingsList = Backbone.Collection.extend({
   //references model
   model: Thing
});

//model data
var things = [
  { title: "Macbook Air", price: 799, id: 1 },
  { title: "Macbook Pro", price: 999, id: 2 },
  { title: "The new iPad", price: 399, id: 3 },
  { title: "Magic Mouse", price: 50, id: 4 },
  { title: "Cinema Display", price: 799, id: 5 }
];

//instantiate collection
var thingsList = new ThingsList(things);

//collectionView
var ThingsListView = Backbone.View.extend({
   el: $('body'),


   render: function(){
     _.each(this.collection.models, function (things) {
            this.renderThing(things);
        }, this);
    },
    
  //references View  
  renderThing: function(things) {
    var thingView = new ThingView({ model: things }); 
    this.$el.append(thingView.render()); 
  }
  
});

/* router section */
    var AppRouter = Backbone.Router.extend({
        routes: {
           "posts/:id": "getPost",
            "*actions": "defaultRoute" // matches http://example.com/#anything-here
        }
    });
    // Initiate the router
    var app_router = new AppRouter;

    app_router.on('route:getPost', function (id) {
       this.item = thingsList.get(id);
       console.log(this.item);
 ...