{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "position": "relative",
    "display": "=if(@currentField, 'inherit', 'none')"
  },
  "attributes": {
    "title": "@currentField"
  },
  "children": [
    {
      "elmType": "div",
      "attributes": {
        "iconName": "HeartFill",
        "class": "='ms-fontColor-' + if(@currentField=='Positive', 'red', if(@currentField=='Negative', 'blue', 'neutral'))"
      },
      "style": {
        "font-size": "36px"
      }
    },
    {
      "elmType": "div",
      "attributes": {
        "iconName": "=if(@currentField=='Positive', 'Heart', if(@currentField=='Negative', 'HeartBroken', 'Health'))",
        "class": "ms-fontColor-black"
      },
      "style": {
        "font-size": "36px",
        "position": "absolute",
        "top": "0",
        "left": "0"
      }
    }
  ]
}