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    JavaScript diagramming library
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    JointJS - JavaScript diagramming library

    Build Status Code Quality: Javascript Total Alerts

    JointJS is a JavaScript diagramming library. It can be used to create either static diagrams or, and more importantly, fully interactive diagramming tools and application builders.

    Please see for more information, demos and documentation.

    Or check out our mind-map documentation.


    • basic diagram elements (rect, circle, ellipse, text, image, path)
    • ready-to-use diagram elements of well-known diagrams (ERD, Org chart, FSA, UML, PN, DEVS, ...)
    • custom diagram elements based on SVG or programmatically rendered
    • interactive elements and links
    • connecting diagram elements with links or links with links
    • customizable links, their arrowheads and labels
    • links smoothing (bezier interpolation)
    • magnets (link connection points) can be placed basically anywhere
    • hierarchical diagrams
    • serialization/deserialization to/from JSON format
    • highly event driven - you can react on any event that happens inside the paper
    • zoom in/out
    • touch support
    • plugin awareness
    • MVC architecture
    • ... a lot more

    Supported browsers

    • Latest Google Chrome (including mobile)
    • Latest Firefox
    • Latest Safari (including mobile)
    • Latest MSEdge
    • Latest Opera
    • IE 11
    • PhantomJS

    Any problem with JointJS in the above browsers should be reported as a bug in JointJS.

    Development Environment

    If you want to work on JointJS locally, use the following guidelines to get started.


    Make sure you have the following dependencies installed on your system:


    Clone this git repository:

    git clone

    Change into the joint directory:

    cd joint

    Install all NPM dependencies:

    npm install

    Generate build files from the source code:

    grunt install

    You are ready now to browse our demos:

    cd demo


    To run all tests:

    grunt test

    To run only the server-side tests:

    grunt test:server

    To run only the client-side tests:

    grunt test:client

    To run code style checks:

    grunt test:code-style

    Code Coverage Reports

    To output a code coverage report in HTML:

    grunt test:coverage

    To output a code coverage report in lcov format:

    grunt test:coverage --reporter="lcov"

    The output for all unit tests will be saved in the coverage directory.

    Building Distribution Files

    The dist directory contains pre-built distribution files. To re-build them, run the following:

    grunt dist


    The source for the JointJS documentation (plus geometry and Vectorizer libraries) are included in this repository; see the docs directory. The documentation can be built into stand-alone HTML documents like this:

    grunt build:docs

    The output of the above command can be found at build/docs.


    JointJS library is licensed under the Mozilla Public License, v. 2.0. Please see the LICENSE file for the full license.

    Copyright (c) 2013 client IO


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