fields-range.json

{
  "schema": {
    "range": {
      "type": "integer",
      "title": "Is JSON Form useful?",
      "description": "The field should appear as a range that accepts values between 0 (excluded) and 200 by steps of 20 on browsers that support the \"range\" input type.<br/>Note that the \"step\" constraint is not enforced when the form is submitted.",
      "default": 40,
      "minimum": 0,
      "exclusiveMinimum": true,
      "maximum": 200
    }
  },
  "form": [
    {
      "key": "range",
      "type": "range",
      "step": 20
    }
  ]
}