List Formatting: Is embed action supported for file previews in document libraries?

[tecchan1107]

What type of issue is this?

Question

What SharePoint development model, framework, SDK or API is this about?

Declarative list formatting

Target SharePoint environment

SharePoint Online

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

No response

Issue description

This is a question related to #10296 .

By applying the following embed action code to a document library, it is possible to preview files on a card. Is this method supported?

Column Formatting Sample Code

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "children": [
    {
      "elmType": "div",
      "style": {
        "border-radius": "50%",
        "cursor": "pointer",
        "font-size": "15px",
        "width": "27px",
        "height": "27px",
        "display": "flex",
        "justify-content": "center",
        "align-items": "center",
        "font-weight": "bold"
      },
      "attributes": {
        "class": "ms-bgColor-themeLighter ms-bgColor-themePrimary--hover ms-fontColor-neutralPrimary ms-fontColor-white--hover",
        "iconName": "View"
      },
      "customRowAction": {
        "action": "embed",
        "actionInput": {
          "src": "=if([$File_x0020_Type] == '' || [$File_x0020_Type] == 'aspx' || [$File_x0020_Type] == 'pdf', [$FileRef] , if([$File_x0020_Type] == 'docx' || [$File_x0020_Type] == 'dotx' || [$File_x0020_Type] == 'dotm' || [$File_x0020_Type] == 'docm' || [$File_x0020_Type] == 'docb' || [$File_x0020_Type] == 'pptx' || [$File_x0020_Type] == 'pptm' || [$File_x0020_Type] == 'potx' || [$File_x0020_Type] == 'potm' || [$File_x0020_Type] == 'ppam' || [$File_x0020_Type] == 'ppsx' || [$File_x0020_Type] == 'ppsm' || [$File_x0020_Type] == 'sldx' || [$File_x0020_Type] == 'sldm' || [$File_x0020_Type] == 'vsdx' || [$File_x0020_Type] == 'xlsx' || [$File_x0020_Type] == 'xlsm' || [$File_x0020_Type] == 'xltx' || [$File_x0020_Type] == 'xltm', @currentWeb +'/_layouts/15/WopiFrame.aspx?sourcedoc=' + [$FileRef] + '&action=view' , @currentWeb +'/_layouts/15/embed.aspx?UniqueId=' + [$UniqueId] + '&client_id=FileViewerWebPart&showNewWindow=true&embed={\"af\":false,\"p\":1,\"z\":\"width\"}&auth=readwrite'))",
          "height": "500",
          "width": "500"
        }
      }
    }
  ]
}

The reason for asking this question is that when I created a similar code in the past, it was restricted.
#8004

[tecchan1107]

When I did this test, I changed the HTML Field Security settings.

[Ashlesha-MSFT]

Hello @tecchan1107,
Thank you for bringing this issue to our attention. We will look into it and get back to you shortly.

[Ashlesha-MSFT]

@tecchan1107,
Just to add to this — the issue previously encountered with Embed.aspx (as noted in #9925), particularly affecting file previews, appears to have been resolved.

This could be the reason why file previews are now working correctly when using the embed action in list formatting to display them on cards.

[tecchan1107]

@Ashlesha-MSFT
Thanks for testing it! Am I correct in understanding that using the embed action to preview files is not a problem?

[tecchan1107]

@Ashlesha-MSFT
I forgot to mention something. Regarding issue #8004, the reason the file preview is no longer available is not a bug, but a restriction, as reported in MC397486 in the Microsoft 365 Admin Center.
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