CODEWITHSUNDEEP
javascriptbackbone.jsunderscore.jslisten
Aryabhatt
Aryabhatt

Reputation: 657

How to listeTo a particular options in backbone.js?

I have view which is initialized as below 

app.OfferMenuView = Backbone.View.extend({
    events: { },
    initialize: function(options) { 
        this.options = options || {};
    }
});

I create an instance of it along with an option - 

this.offermenu = new app.OfferMenuView({offer_heading:-1});

Now I want to bind a listenTo to listen to the change in the value of the options.offer_heading .

I have tried with writing this:

this.offermenu.listenTo(this.offermenu,'change:options',this.offermenu.render);

But this does not go to render function on change of offer_heading. What is the correct way of binding a listenTo for change in an options value ?

Thanks in advance.

Upvotes: 0

Views: 41

Answers (1)

Khang Pham
Khang Pham

Reputation: 24

example:

app.OfferMenuView = Backbone.View.extend({
    events: { },
    initialize: function() {   
        this.listenTo(this.model,'change:options', this.render);
    }
});

app.Model = Backbone.Model.extend({ 
    defaults: {
        //options
        foo: 'bar',
        //....
    }
});

var newModel = new app.Model();

this.offermenu = new app.OfferMenuView({model: newModel});

view -> listenTo (model)

you can see this page: http://backbonejs.org/#Events-listenTo

view.listenTo(model, 'change', view.render);

Upvotes: 1

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