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High level application framework for Javascript (built on top of jquery-haml and modeled somewhat after SproutCore)
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Top Cloud

High level application framework for Javascript (built on top of haml-js and modeled somewhat after SproutCore)

I gave a 30 minute presentation to my local Ruby users group about TopCloud and related technologies. You can view it on vimeo

This framework is very much a work in progress. I'm giving a presentation on it at the local Dallas Ruby Group for October's meeting. I'll post a recording of the presentation if possible.

The source code to my example site is at the node-topcloud-chat repo.

Top Cloud is a MVC framework for the browser, much in spirit of SproutCore, but made to be embedded inside existing legacy apps.

Top Cloud uses the haml-js project for the dom-building aspect.


TopCloud has databinding at the controller level. The bound variables can optionally use proxy objects that can in turn proxy to model classes on the server side if desired.


This is an example View. This is written in the TopCloud interface language. There is a TextMate bundle for adding highlighting support included.

Dialog width: 400, height: 250
    minWidth: 300
    minHeight: 200
    title: "Code Samples"

    Panel left: 0, bottom: 0, right: 0, height: 40
        borderTop: 1

        Button left: 10, top: 10, width: 65, height: 20
            value: "Cancel"
            icon: "cancel"
            click: @cancel
        Button right: 10, top: 10, width: 68, height: 20
            value: "Submit"
            icon: "check"
            click: @submit

    DropDown left: 10, top: 10, right: 10, height: 20
        value: "ruby"
        options: {ruby: "Ruby", "javascript": "Javascript", "python": "Python"}

    TextEntry left: 10, top: 40, right: 10, bottom: 50
        value: @remote_text
        multiline: true


Controllers are javascript objects that are run in the browser. They provide the code behind the views and hold all interaction logic.

Here is an example controller:

TC.defineController("Dialogs.CodeSamples", function (lang) {

    this.bindData("remote_text", {
        proxy: new TextSource()

    this.cancel = function (button) {

    this.submit = function (button) {
        alert("TODO: Do some action");

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