68 lines
2.8 KiB
Markdown
68 lines
2.8 KiB
Markdown
---
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page_type: sample
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products:
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- office-sp
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languages:
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- javascript
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- typescript
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extensions:
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contentType: samples
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technologies:
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- SharePoint Framework
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platforms:
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- react
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createdDate: 8/1/2017 12:00:00 AM
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---
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# SharePoint Framework webpart sample using React, Redux and ImmutableJS
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## Summary
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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.
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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.
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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)
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## Used SharePoint Framework Version
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## Applies to
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* [SharePoint Framework](https://docs.microsoft.com/sharepoint/dev/spfx/sharepoint-framework-overview)
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* [Office 365 tenant](https://docs.microsoft.com/sharepoint/dev/spfx/set-up-your-development-environment)
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## Solution
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Solution|Author(s)
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--------|---------
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React-Redux-RESTAPI | Vardhaman Deshpande [@vrdmn](https://twitter.com/vrdmn)
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## Version history
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Version|Date|Comments
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-------|----|--------
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1.0|July 11, 2017|Initial release
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## Disclaimer
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**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.**
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---
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## Minimal Path to Awesome
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- Clone this repository
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- in the command line run:
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- `npm install`
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- `gulp serve`
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- Open the SharePoint Online version of the workbench: /_layouts/15/workbench.aspx
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## Why Redux and ImmutableJS
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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.
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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.
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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.
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<img src="https://telemetry.sharepointpnp.com/sp-dev-fx-webparts/samples/react-redux-async-immutablejs" />
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