Web / Desktop

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• Android
• iOS
• JavaScript
• UWP

#4305 tracks this issue for .NET

Author or host

This is issue seen in the empty text playlod in Adaptive Card.

Version of SDK

1.2.5

Details

For empty text blocks – there is too much spacing rendered on Mobile as compared to Desktop (example in images below). Empty text block elements should not be rendered at all.

JSON for these cards attached

Desktop:

Mobile:

This issues in see in empty text block in Adaptive Card.

Payload :

{
  "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
  "type": "AdaptiveCard",
  "version": "1.0",
  "body": [
    {
      "type": "Container",
      "items": [
          {
          "type": "TextBlock",
          "text": "before"
        },
        {
          "type": "TextBlock",
          "text": ""
        },
        {
          "type": "TextBlock",
          "text": ""
        },
        {
          "type": "TextBlock",
          "text": "after"
        },
        {
          "type": "Image",
          "url": "http://adaptivecards.io/content/cats/1.png"
        }
      ]
    }
  ]
}

Input from @Susan Shen :

@Vikrant Singh Checked the SDK code and I’m seeing that if the text is an empty string, the SDK renderer returns null for the object, and therefore, the TextBlock is not rendered. The behavior in Web/Desktop holds in the Adaptive Card Designer as well - you can use the same payload and then select Preview Mode to see that there’s no spacing between the before and after.

I think the overall behavior should be that if the developer wants to display an empty text block, they can create one by setting the text to " " (one space) instead of an empty string.

This look like a discrepancy where for Desktop client A.C SDK Returns the null instance instead of a new line for empty strings?