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Dash PaneSplit allows the page area to be split into Main and Sidebar sections. By combining multiple PaneSplits, a complex and flexible experience similar to Studio style can be achieved.




Dash PaneSplit

Dash PaneSplit allows the page area to be split into Main and Sidebar sections, and by combining multiple PaneSplits, a complex and flexible Studio-style experience can be achieved. It is based on the encapsulation and modification of split-pane-react and supports a richer set of features needed for practical projects.

Get started with:

  1. Install Dash and its dependencies:
  2. Run python
  3. Visit http://localhost:8050 in your web browser



Install dependencies

If you have selected install_dependencies during the prompt, you can skip this part.

  1. Install npm packages

    $ npm install
  2. Create a virtual env and activate.

    $ virtualenv venv
    $ . venv/bin/activate

    Note: venv\Scripts\activate for windows

  3. Install python packages required to build components.

    $ pip install -r requirements.txt
  4. Install the python packages for testing (optional)

    $ pip install -r tests/requirements.txt

Write your component code in src/lib/components/DashPaneSplit.react.js.

  • The demo app is in src/demo and you will import your example component code into your demo app.
  • Test your code in a Python environment:
    1. Build your code
      $ npm run build
    2. Run and modify the sample dash app:
      $ python
  • Write tests for your component.
    • A sample test is available in tests/, it will load and you can then automate interactions with selenium.
    • Run the tests with $ pytest tests.
    • The Dash team uses these types of integration tests extensively. Browse the Dash component code on GitHub for more examples of testing (e.g.
  • Add custom styles to your component by putting your custom CSS files into your distribution folder (dash_pane_split).
    • Make sure that they are referenced in so that they get properly included when you're ready to publish your component.
    • Make sure the stylesheets are added to the _css_dist dict in dash_pane_split/ so dash will serve them automatically when the component suite is requested.
  • Review your code

Create a production build and publish:

  1. Build your code:

    $ npm run build
  2. Create a Python distribution

    $ python sdist bdist_wheel

    This will create source and wheel distribution in the generated the dist/ folder. See PyPA for more information.

  3. Test your tarball by copying it into a new environment and installing it locally:

    $ pip install dash_pane_split-0.0.1.tar.gz
  4. If it works, then you can publish the component to NPM and PyPI:

    1. Publish on PyPI
      $ twine upload dist/*
    2. Cleanup the dist folder (optional)
      $ rm -rf dist
    3. Publish on NPM (Optional if chosen False in publish_on_npm)
      $ npm publish
      Publishing your component to NPM will make the JavaScript bundles available on the unpkg CDN. By default, Dash serves the component library's CSS and JS locally, but if you choose to publish the package to NPM you can set serve_locally to False and you may see faster load times.
  5. Share your component with the community!

    1. Publish this repository to GitHub
    2. Tag your GitHub repository with the plotly-dash tag so that it appears here:
    3. Create a post in the Dash community forum:


Did you know?

Socket installs a GitHub app to automatically flag issues on every pull request and report the health of your dependencies. Find out what is inside your node modules and prevent malicious activity before you update the dependencies.


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