Elemental is an open-source React & CSS UI Framework designed for building web applications, developed by Thinkmill. The project's latest version is 0.6.1, and its primary focus was to provide a modular set of UI components built to natively implement React patterns, particularly for use with KeystoneJS. While the original vision included being 'currently under development' and responsive to feedback for API experimentation and styling transitions, the project has not seen updates since around 2017, making it effectively abandoned. It supported older React versions (0.14 and 15) and leveraged LESS for styling, requiring a LESS compiler in the build process. Key differentiators included its unopinionated default style and flexible theming capabilities, built upon React.js, LESS, Babel, and Gulp.
npm install elementalVerified import paths — ran on the pinned version, not inferred.
This quickstart demonstrates rendering a Button, an Alert, and a Spinner component from Elemental UI in a basic React application, including toggling the alert visibility. It highlights the need for LESS compilation for styles.
Use Elemental UI with a compatible React environment (React 0.14.x or 15.x) or consider migrating to a actively maintained UI library. Backporting to newer React versions is highly complex and not recommended.
Ensure your project's build configuration includes a LESS compiler (e.g., `npm install less less-loader --save-dev` and configure Webpack to handle `.less` files). Then, import the main stylesheet: `@import '~elemental/less/elemental.less';` in your global CSS/LESS file.
For new projects, avoid Elemental UI. For existing projects, plan for migration to a currently maintained React UI library (e.g., Ant Design, Material UI, Elemental Plus - a separate project for Vue).
This issue is inherent to using an abandoned library with old dependencies. The most robust fix is migrating to a modern UI library. If strictly adhering to Elemental, ensure all specified peer dependencies are installed, even if deprecated.
Verify that your `react` and `react-dom` peer dependencies exactly match the `^0.14.0 || ^15.0.0` range specified by Elemental. Downgrade your React versions if necessary, or use `npm install --legacy-peer-deps` (if applicable) to force install compatible versions.
Ensure `less-loader` is installed and properly configured in your Webpack (or equivalent) setup to handle `.less` files. Add `@import '~elemental/less/elemental.less';` to your main stylesheet. Verify `node_modules` is included in your loader paths.
While `prop-types` package can polyfill this for *some* cases, the fundamental incompatibility with modern React due to other API changes remains. The only true fix is to use Elemental with `react@<15.5` or migrate to a new UI library.