Doughnut Chart

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  "elmType": "div",
  "style": {
    "display": "=if(@currentField=='','none','flex')",
    "justify-content": "space-between",
    "padding": "0px 10px",
    "max-width": "100px"
  },
  "children": [
    {
      "elmType": "div",
      "style": {
        "min-width": "25px",
        "min-height": "25px",
        "position": "relative",
        "margin-right": "10px"
      },
      "children": [
        {
          "elmType": "svg",
          "style": {
            "fill": "currentColor",
            "position": "absolute",
            "top": "0",
            "right": "0"
          },
          "attributes": {
            "viewBox": "0 0 600 600",
            "class": "ms-fontColor-neutralQuaternaryAlt"
          },
          "children": [
            {
              "elmType": "path",
              "attributes": {
                "d": "M300,0 A300,300 0 1,1 299.9990166,0.0000016 L299.9995083,150.000001 A150,150 0 1,0 300,150 Z"
              }
            }
          ]
        },
        {
          "elmType": "svg",
          "style": {
            "fill": "currentColor",
            "position": "absolute",
            "top": "0",
            "right": "0",
            "display": "=if(@currentField < 0 , 'none' , '')"
          },
          "attributes": {
            "viewBox": "0 0 600 600",
            "class": "ms-fontColor-themePrimary"
          },
          "children": [
            {
              "elmType": "path",
              "attributes": {
                "d": "= 'M300,0 A300,300 0 ' + if(@currentField > 0.5 , '1,1 ' , '0,1 ') + (300 + 300 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 300 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' L' + (300 + 150 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 150 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' A150,150 0 ' + if(@currentField > 0.5 , '1,0 ' , '0,0 ') + ' 300,150 Z'"
              }
            }
          ]
        }
      ]
    },
    {
      "elmType": "div",
      "txtContent": "@currentField.displayValue",
      "style": {
        "text-overflow": "ellipsis",
        "overflow": "hidden"
      }
    }
  ]
}

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "position": "relative",
    "margin": "10px",
    "width": "75px",
    "height": "75px"
  },
  "children": [
    {
      "elmType": "svg",
      "style": {
        "fill": "currentColor",
        "position": "absolute",
        "top": "0",
        "right": "0"
      },
      "attributes": {
        "viewBox": "0 0 600 600",
        "class": "ms-fontColor-neutralQuaternaryAlt"
      },
      "children": [
        {
          "elmType": "path",
          "attributes": {
            "d": "M300,0 A300,300 0 1,1 299.998407846124,4.2249439502484165e-9 L299.99880588459297,75.00000000316868 A225,225 0 1,0 300,75 Z"
          }
        }
      ]
    },
    {
      "elmType": "svg",
      "style": {
        "fill": "currentColor",
        "position": "absolute",
        "top": "0",
        "right": "0",
        "display": "=if(@currentField < 0 , 'none' , '')"
      },
      "attributes": {
        "viewBox": "0 0 600 600",
        "class": "ms-fontColor-themePrimary"
      },
      "children": [
        {
          "elmType": "path",
          "attributes": {
            "d": "= 'M300,0 A300,300 0 ' + if(@currentField > 0.5 , '1,1 ' , '0,1 ') + (300 + 300 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 300 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' L' + (300 + 225 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 225 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' A225,225 0 ' + if(@currentField > 0.5 , '1,0 ' , '0,0 ') + ' 300,75 Z'"
          }
        }
      ]
    },
    {
      "elmType": "div",
      "style": {
        "position": "absolute",
        "width": "100%",
        "height": "100%",
        "display": "flex",
        "flex-direction": "column",
        "justify-content": "center",
        "align-items": "center",
        "cursor": "pointer"
      },
      "attributes": {
        "class": "ms-fontColor-themePrimary"
      },
      "customCardProps": {
        "directionalHint": "rightCenter",
        "isBeakVisible": true,
        "openOnEvent": "hover",
        "formatter": {
          "elmType": "div",
          "style": {
            "padding": "15px"
          },
          "children": [
            {
              "elmType": "div",
              "style": {
                "font-size": "25px",
                "font-weight": "bold"
              },
              "txtContent": "@currentField.displayValue",
              "attributes": {
                "class": "ms-fontColor-themePrimary"
              }
            }
          ]
        }
      },
      "children": [
        {
          "elmType": "div",
          "style": {
            "font-size": "30px"
          },
          "attributes": {
            "iconName": "HeartFill"
          }
        }
      ]
    }
  ]
}

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "position": "relative",
    "margin": "10px",
    "width": "75px",
    "height": "75px"
  },
  "children": [
    {
      "elmType": "svg",
      "style": {
        "fill": "currentColor",
        "position": "absolute",
        "top": "0",
        "right": "0"
      },
      "attributes": {
        "viewBox": "0 0 600 600",
        "class": "ms-fontColor-neutralQuaternaryAlt"
      },
      "children": [
        {
          "elmType": "path",
          "attributes": {
            "d": "M300,0 A300,300 0 1,1 299.998407846124,4.2249439502484165e-9 L299.99880588459297,75.00000000316868 A225,225 0 1,0 300,75 Z"
          }
        }
      ]
    },
    {
      "elmType": "svg",
      "style": {
        "fill": "currentColor",
        "position": "absolute",
        "top": "0",
        "right": "0",
        "display": "=if(@currentField < 0 , 'none' , '')"
      },
      "attributes": {
        "viewBox": "0 0 600 600",
        "class": "ms-fontColor-themePrimary"
      },
      "children": [
        {
          "elmType": "path",
          "attributes": {
            "d": "= 'M300,0 A300,300 0 ' + if(@currentField > 0.5 , '1,1 ' , '0,1 ') + (300 + 300 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 300 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' L' + (300 + 225 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 225 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' A225,225 0 ' + if(@currentField > 0.5 , '1,0 ' , '0,0 ') + ' 300,75 Z'"
          }
        }
      ]
    },
    {
      "elmType": "div",
      "style": {
        "position": "absolute",
        "width": "100%",
        "height": "100%",
        "display": "flex",
        "flex-direction": "column",
        "justify-content": "center",
        "align-items": "center"
      },
      "attributes": {
        "class": "ms-fontColor-themePrimary"
      },
      "children": [
        {
          "elmType": "div",
          "style": {
            "width": "70%",
            "text-align": "center",
            "font-size": "15px",
            "font-weight": "bold"
          },
          "txtContent": "@currentField.displayValue"
        }
      ]
    }
  ]
}

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  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "position": "relative",
    "margin": "10px",
    "width": "75px",
    "height": "75px"
  },
  "children": [
    {
      "elmType": "svg",
      "style": {
        "fill": "currentColor",
        "position": "absolute",
        "top": "0",
        "right": "0"
      },
      "attributes": {
        "viewBox": "0 0 600 600",
        "class": "ms-fontColor-neutralQuaternaryAlt"
      },
      "children": [
        {
          "elmType": "path",
          "attributes": {
            "d": "M300,0 A300,300 0 1,1 299.998407846124,4.2249439502484165e-9 L299.99880588459297,75.00000000316868 A225,225 0 1,0 300,75 Z"
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        }
      ]
    },
    {
      "elmType": "svg",
      "style": {
        "fill": "currentColor",
        "position": "absolute",
        "top": "0",
        "right": "0",
        "display": "=if(@currentField < 0 , 'none' , '')"
      },
      "attributes": {
        "viewBox": "0 0 600 600",
        "class": "ms-fontColor-themePrimary"
      },
      "children": [
        {
          "elmType": "path",
          "attributes": {
            "d": "= 'M300,0 A300,300 0 ' + if(@currentField > 0.5 , '1,1 ' , '0,1 ') + (300 + 300 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 300 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' L' + (300 + 225 * sin(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ',' + (300 - 225 * cos(360 * if(@currentField > 1 , 1 , @currentField) * (3.14159 / 180))) + ' A225,225 0 ' + if(@currentField > 0.5 , '1,0 ' , '0,0 ') + ' 300,75 Z'"
          }
        }
      ]
    },
    {
      "elmType": "div",
      "style": {
        "position": "absolute",
        "width": "100%",
        "height": "100%",
        "display": "flex",
        "flex-direction": "column",
        "justify-content": "center",
        "align-items": "center"
      },
      "attributes": {
        "class": "ms-fontColor-themePrimary"
      },
      "children": [
        {
          "elmType": "div",
          "style": {
            "font-size": "18px",
            "margin-bottom": "2px"
          },
          "attributes": {
            "iconName": "SkypeCircleCheck"
          }
        },
        {
          "elmType": "div",
          "style": {
            "width": "70%",
            "text-align": "center",
            "font-size": "12px",
            "font-weight": "bold"
          },
          "txtContent": "@currentField.displayValue"
        }
      ]
    }
  ]
}