sp-property-pane
This package exposes the SharePoint property pane for usage by third-party components such as web parts. The property pane is an editing surface that provides common UI controls such as labels, buttons, checkboxes, sliders etc., The interface is designed to ensure compatibility with any rendering framework and visual consistency with any SharePoint release.
This package is part of the SharePoint Framework, which is a collection of NPM packages that empower developers to create client-side experiences for Microsoft SharePoint. For more information, including complete API documentation and code samples, please visit the SharePoint Framework web site.