Overview of the SharePoint Framework
Microsoft's edit ·
Microsoft's commit message in SharePoint/sp-dev-docs · commit 0ee8e59 · +3 −0 lines · also on GitHub
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If you work primarily with C#, you want to learn more about client-side JavaScript development. Most of your existing JavaScript knowledge related to SharePoint, however, is transferable, as the data models haven't changed, and you’ll use the same [REST services](../sp-add-ins/get-to-know-the-sharepoint-rest-service.md) depending on your requirements. If you're a C# developer, TypeScript is a nice transition into the JavaScript world. The choice of IDE is up to you. Many developers like to use the cross-platform IDE [Visual Studio Code](https://code.visualstudio.com).
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+> [!IMPORTANT]
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+> The SharePoint page [HTML DOM](https://www.w3.org/TR/WD-DOM/introduction.html) is not an API. You should avoid taking any dependencies on the page DOM structure or CSS styles, which are subject to change and potentially break your solutions. SharePoint Framework provides a rich API to customize the SharePoint experience in reliable ways and is the only supported means to interact with the SharePoint page HTML DOM.
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> [!NOTE]
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> All supported scenarios for SharePoint Framework are included in the documentation. Any scenario which is not covered in the documentation, is considered as unsupported. If you need to validate the supportability of your planned scenario, please use the available Microsoft support channels.
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