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Thumbnail/preview of pages and files in SharePoint

Summary

A web part showcasing how to call the Microsoft Graph Thumbnails API to generate a preview image for files and pages in SharePoint. The sample illustrates how to craft the preview URL both from a search result as well as from a SharePoint item object.

Note that a preview for all file formats (eg. Excel) might not currently be available.

The sample calls the Microsoft Graph API directly directly via the _api/2.0 endpoint in SharePoint Online, but can easily be changed to call the Graph API endpoint directly for scenarios outside of SharePoint as long as an access token is retrieved.

The goal of the sample is to illustrate a single call calling pattern for the thumbnail with the following calling pattern:

<img src="<endpoint>/sites/<site id>/lists/<list id>/items/<item id>/driveItem/thumbnails/0/<custom size>/content">

Token	Description
endpoint	graph.microsoft.com/v1.0 tenant.sharepoint.com/_api/v2.0
site id	Site object id - GUID.
list id	List object id - GUID.
item id	ListItem object id or unique id - Integer/GUID.
custom size	See Requesting custom thumbnail sizes in the official Microsoft Graph documentation.

Compatibility

⚠️ Important
Every SPFx version is only compatible with specific version(s) of Node.js. In order to be able to build this sample, please ensure that the version of Node on your workstation matches one of the versions listed in this section. This sample will not work on a different version of Node.
Refer to https://aka.ms/spfx-matrix for more information on SPFx compatibility.

Applies to

Contributors

Mikael Svenson

Version history

Version	Date	Comments
1.0	January 21st, 2020	Initial release

Minimal Path to Awesome

Local testing

Clone this repository
In the command line run:
- npm install
- gulp serve

Deploy

gulp clean
gulp bundle --ship
gulp package-solution --ship
Upload the js-msgraph-thumbnail.sppkg file from sharepoint\solution to your tenant App Catalog
- E.g.: https://<tenant>.sharepoint.com/sites/AppCatalog/AppCatalog
Add the web part Thumbnail to a site collection where you have files in the Shared Documents folder, and test it on a page.
Change const libraryPath = "Shared Documents"; if you want to target SitePages or a different library.

Help

We do not support samples, but we this community is always willing to help, and we want to improve these samples. We use GitHub to track issues, which makes it easy for community members to volunteer their time and help resolve issues.

If you're having issues building the solution, please run spfx doctor from within the solution folder to diagnose incompatibility issues with your environment.

You can try looking at issues related to this sample to see if anybody else is having the same issues.

You can also try looking at discussions related to this sample and see what the community is saying.

If you encounter any issues while using this sample, create a new issue.

For questions regarding this sample, create a new question.

Finally, if you have an idea for improvement, make a suggestion.

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.

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