What is mui-x?

MUI X is a collection of advanced React components built for applications that need to display and interact with large amounts of data. The main components are a Data Grid for showing tabular data, Date and Time Pickers, Charts, and a Tree View for hierarchical data. These are built by the same team behind Material UI, the widely used React component library, but MUI X focuses on more complex, feature-heavy pieces that go beyond basic UI building blocks. The project uses an open-core licensing model. A free Community tier is published under the MIT license and is free to use indefinitely. A paid Pro tier adds features like multi-column sorting and filtering, column resizing and pinning, date range pickers, and drag-and-drop tree reordering. A paid Premium tier adds further capabilities to the Data Grid including row grouping and the ability to export to Excel format. The Pro and Premium packages are separate npm packages installed alongside the free ones. For a team building an internal dashboard, an admin panel, or any interface where users sort through tables of records or pick date ranges, MUI X provides ready-built components that handle the interaction patterns and accessibility concerns that would otherwise take significant time to build from scratch. The components are designed to work within either a Material UI design system or a custom one. The README points to external documentation for installation steps and usage guides for each component. It also describes the project's support options, contribution process, and security policy. A public roadmap is maintained separately. The community version components are MIT licensed and the team has stated they will remain free permanently. Revenue from commercial licenses funds the engineering team that maintains all tiers of the project.