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backbone-bindings-sample.js

Backbone.Bindings = {
    setModel: function(model, bindings) {
        var view = this;

        bindings || (bindings = (this.bindings || {}));

        if(this.model) {
            this.model.unbind();
        }

        _.each(bindings, function(i, selector) {
            var property = bindings[selector];

            model.bind("change:" + property, function() {
                view.$(selector).val(model.get(property));
            });

            view.$(selector).unbind("change");
            view.$(selector).bind("change", function(event) {
                var $this = $(event.target);
                var hash = {};
                hash[property] = $this.val();
                model.set(hash);
            });
        });

        this.model = model;
    }
};

var BindedView = Backbone.View.extend(Backbone.Bindings);


var TheModel = Backbone.Model.extend({
});

var TheView = BindedView.extend({
    el: "div#target",
    bindings: {"#name": "name", "#weight": "weight"},
    render: function() {
        $(this.el).html("<input id='name' /><br/><input id='weight'/>");
    }
});

var view = new TheView();
var model = new TheModel();

view.render();
view.setModel(model);

model.set({name: "Hello", weight: 100});