--- page_type: sample products: - office-sp languages: - javascript - typescript extensions: contentType: samples technologies: - SharePoint Framework platforms: - react createdDate: 8/1/2017 12:00:00 AM --- # SharePoint Framework webpart sample using React, Redux and ImmutableJS ## Summary SharePoint Framework webpart which uses [Redux](http://redux.js.org/) to maintain a single state for the entire application and [ImmutableJS](https://facebook.github.io/immutable-js/) to create performant state trees. Redux AJAX actions are used together with the SharePoint REST API to display lists in your site. You can also add a new list to the site from this webpart. More details in my post here: [Using Redux Async Actions and ImmutableJS in SharePoint Framework](http://www.vrdmn.com/2017/07/using-redux-async-actions-and.html) ![](https://raw.githubusercontent.com/vman/sp-dev-fx-webparts/master/samples/react-redux-async-immutablejs/assets/react-redux-immutable.gif) ## Used SharePoint Framework Version ![drop](https://img.shields.io/badge/version-GA-green.svg) ## Applies to * [SharePoint Framework](https://docs.microsoft.com/sharepoint/dev/spfx/sharepoint-framework-overview) * [Office 365 tenant](https://docs.microsoft.com/sharepoint/dev/spfx/set-up-your-development-environment) ## Solution Solution|Author(s) --------|--------- React-Redux-RESTAPI | Vardhaman Deshpande [@vrdmn](https://twitter.com/vrdmn) ## Version history Version|Date|Comments -------|----|-------- 1.0|July 11, 2017|Initial release ## Disclaimer **THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.** --- ## Minimal Path to Awesome - Clone this repository - in the command line run: - `npm install` - `gulp serve` - Open the SharePoint Online version of the workbench: /_layouts/15/workbench.aspx ## Why Redux and ImmutableJS Every [Redux](http://redux.js.org/) action creates a copy of the state, changes the required properties in the copy and then returns the copy as a new state. This prevents bugs where the state is changed unknowingly. On the other hand, this can also be performance intensive as for changing only a single element, we have to copy the entire state tree in memory. Fortunately, [ImmutableJS](https://facebook.github.io/immutable-js/) comes to the rescue here. Using ImmutableJS, we can create new state trees in memory without duplicating the elements which are unchanged. When you create a new state object using ImmutableJS, the new object still points to the previous memory locations of unchanged elements. Only the properties which are changed are allocated new memory locations.