The new programming language for web apps
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This is the readme for v1.0.0-beta. For other versions, see Visit for more information!


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if ruby and react had an indentation-based child, what would it look like? Imba is a new programming language for the web that compiles to performant and readable JavaScript. It has language level support for defining, extending, subclassing, instantiating and rendering dom nodes. For a semi-complex application like TodoMVC, it is more than 20 times faster than React with less code, and a much smaller library.


To get started with Imba, we recommend reading through the official guide. All snippets are editable and executable. If you have any questions, please join our gitter channel.


Get Node.js and npm, then:

  • npm install -g imba

Regular code will run fine without any dependencies, but if you intend to use tags and selectors, remember to include the Imba library. On the server you should do npm install imba --save in your project, and require 'imba' in your application. For a simple example see hello-world



Imba ships with a basic node wrapper for running imba-scripts. Use imba the same way you would use node. Call imba without arguments to see available options.

imba app.imba will compile and execute app.imba


The imbapack utility is a convenient wrapper around webpack, which preprocesses your config to include the necessary configurations for loading .imba files. It supports all the same options as webpack and will work with webpack.config.js files directly. When you use imbapack you do not need to declare an imba-loader and resolveExtensions in your configs.

imbapack app.imba bundle.js compiles the file app.imba, and all required files into a webpack bundle named bundle.js. This file can be included in a html page like any other js-file. See webpack for more details.

imbapack --watch app.imba bundle.js same as above, but recompiles whenever app.imba or any related files change.


The imbac utility is for compiling your scripts to js. When working on client-side projects you should rather use imbapack (see above). Call imbac without arguments to see available options. If you are not able to use imba to run your project, or you really need to precompile the code (for running on node), you can use imbac.


We currently recommend Sublime Text for Imba, since this is the only editor with a solid plugin so far. The sublime-plugin can be installed through Sublime Package Manager. It is highly recommended to use Sublime Text 3 for best highlighting and annotations.


Contributors are always welcome. To start with, you should clone the repository and try to get somewhat familiar with the codebase. Please shoot me a message on github if you have any comments or questions, and I will try to get back to you asap.