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Code Assistant for TypeScript

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CATS is an IDE for the TypeScript developer. CATS is open source software released under the Apache 2.0 license and runs on Linux, Windows and OS X. CATS itself is written in TypeScript and even being developed using CATS as the IDE.

Right now CATS already has built-in support for the following features:


In order to build CATS, ensure that you have Git and Node.js installed.

Clone a copy of the CATS repo:

git clone

Change to the cats directory:

cd cats

Install Nodewebkit, TypeScript, Jake and the module dependencies:

npm install -g nodewebkit
npm install -g typescript
npm install -g jake
npm install

Use one of the following to build:

jake lib/main.js            # Builds the main frontend module for CATS
jake lib/tsworker.js        # Builds the Web workers module
jake clean                  # Cleans the compiler output, declare files, and tests
jake default                # Builds the full CATS application
jake -T                     # List the above commands. 


From the cats directory run


There are some option you can use. For example to open CATS with a specific project, use:

nodewebkit --project </path/projectDirectory>

Although you can use a relative path for specifying the project directory, please notice it is relative to the CATS installation directory and not the directory you are currently in. So normally better to use a full path.

To open CATS with the same project as last time use the --restore option:

nodewebkit --restore

With CATS you also get a samples directory with some small projects you can try out. Of course you can also open a directory that contains your own project.

nodewebkit --project samples/greeter


CATS will look for a file in the project directory called: ".settings/config.json". If found, CATS will use the values configured in this file, otherwise it will use some sensible default values. You can edit this file (or the default values if you don't have this file yet) from the main menu.


One of the main goals of CATS is to make the developer that is used to IDE's like Eclipse, NetBeans, Visual Studio or IntelliJ, feel right at home. So the same support you got from your IDE when you developed in Java or C#, is now available for TypeScript projects.

However a lot of effort is spent to assure CATS deosn't become a resource hog. So while designing and developing CATS, performance is one of the key aspects. In fact, CATS runs fine on older hardware.

Bugs and Issues

In case you encounter an issue, you can open a ticket on Github. Also enhancement requests can be entered here: Github issue tracker

Couldn't have done it without ....

There is not a lot of documentation yet explaining the structure of CATS and how the different parts work together. So the more surprised we were when we received some pull request that added functionality or fixed some bugs. So thanks to everyone who already contributed to this project.

And of course some of the main 3rd party components that we have used within CATS and couldn't have done without:


The todo list items are tracked as enhancement requests on GitHub. You can check them out at:

Todo List

There is also a milestone planning in there when some enhancements should be delivered.