As of Dash 2, the development of dash-html-components has been moved to the main Dash repo

This package exists for backward compatibility


Vanilla HTML components for Dash

Install dependencies

  1. Create a virtual env and activate.

    $ virtualenv venv
    $ venv/bin/activate

    Note: venv\Scripts\activate for Windows

  2. Install Python packages required to build components.

    $ pip install -r dev-requirements.txt
  3. Generate components and install npm packages

    $ npm install

Generating HTML Components

The components in src/components, as well as the export index in src/index.js are programmatically generated from element definitions in scripts/. To regenerate:

$ npm run generate-components

The list of attributes is regenerated by scraping the MDN HTML attribute reference.

Note: This step will have already been done for you when you ran npm install


Testing your components in Dash

  1. Watch for changes

     $ npm run build:watch
  2. Install module locally (after every change)

     # Generate metadata, and build the JavaScript bundle
     $ npm run install-local
     # Now you're done. For subsequent changes, if you've got `npm run build:watch`
     $ python install
  3. Run the Dash layout you want to test

     # Import dash_html_components to your layout, then run it:
     $ python

Installing Python package locally

Before publishing to PyPi, you can test installing the module locally:

# Install in `site-packages` on your machine
$ npm run install-local

Uninstalling Python package locally

$ npm run uninstall-local


See the contributing guide for guidelines on contributing to this project.

Create a production build and publish:

  1. Build your code:

    $ npm run build
  2. Create a Python tarball

    $ python sdist

    This distribution tarball will get generated in the dist/ folder

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

    $ pip install dash-html-components-<new-version>.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 servers the component library's CSS and JS from the remote unpkg CDN, so if you haven't published the component package to NPM you'll need to set the serve_locally flags to True (unless you choose False on publish_on_npm). We will eventually make serve_locally=True the default, follow our progress in this issue.