backbone-lazyview is a Backbone plugin writtern in JavaScript. It watches the scroll event of the window object and triggers an appear event on a lazyview object when it's el property appeared on the screen.

Include required js libraries and backbone.lazyview.js into your HTML.

<script src="jquery.js"></script>
<script src="underscore.js"></script>
<script src="backbone.js"></script>
<script src="lazyview.js"></script>

You can use appear event as well as other DOM events.

var MyLazyView = Backbone.LazyView.extend({
    events: {
        appear: 'appearEventHandler'
    },
    appearEventHandler: function () {
        /* do something */
    }
});
var view = new LazyView({el: '#element'});

See Demo.

Licensed under MIT