SharePoint Online list - format group headers to remove column name when multiple columns are grouped

Question

I have been searching the web to try and find an answer to this question however, all pages seem to relate to just 1 column grouping.

I have a list of people who are grouped together as gangs and then for the company that they work for.

This page SharePoint Online list - format group headers to remove column name accomplishes the sort of view that I am looking for however, when I add the following JSON, the gang does not display:

    {
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/row-formatting.schema.json",
  "groupProps": {
    "headerFormatter": {
      "elmType": "div",
      "style": {
        "padding-left": "12px",
        "font-size": "16px",
        "font-weight": "400",
        "cursor": "pointer",
        "outline": "0px",
        "white-space": "nowrap",
        "text-overflow": "ellipsis"
      },
      "children": [
        {
          "elmType": "div",
          "children": [
            {
              "elmType": "span",
              "style": {
                "padding": "5px 5px 5px 5px"
              },
              "txtContent": "@group.fieldData.title"
            }
          ]
        },
        {
          "elmType": "div",
          "children": [
            {
              "elmType": "div",
              "style": {
                "display": "flex",
                "flex-direction": "row",
                "justify-content": "center"
              },
              "children": [
                {
                  "elmType": "div",
                  "txtContent": "=' (' + @group.count + ')'"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}

However, if I leave @group.fieldData.displayValue it displays as [Object] [Object].

What I am looking to achieve is the Company Name in a group without being preceded with "Company Name:" and also the Gang Name in a group without being preceded with "Gang Name:".

Answer 1

In case of lookup columns, use @group.fieldData.lookupValue like given in below JSON:

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/row-formatting.schema.json",
  "debugMode": true,
  "groupProps": {
    "headerFormatter": {
      "elmType": "div",
      "style": {
        "padding-left": "12px",
        "font-size": "16px",
        "font-weight": "400",
        "cursor": "pointer",
        "outline": "0px",
        "white-space": "nowrap",
        "text-overflow": "ellipsis"
      },
      "children": [
        {
          "elmType": "div",
          "children": [
            {
              "elmType": "span",
              "style": {
                "padding": "5px 5px 5px 5px"
              },
              "txtContent": "@group.fieldData.lookupValue"
            }
          ]
        },
        {
          "elmType": "div",
          "children": [
            {
              "elmType": "div",
              "style": {
                "display": "flex",
                "flex-direction": "row",
                "justify-content": "center"
              },
              "children": [
                {
                  "elmType": "div",
                  "txtContent": "=' (' + @group.count + ')'"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}

Output:

Before applying JSON:

After applying JSON: