How to make a valid json with a onChange function ? about jsonform HOT 4 CLOSED

"onChange": "(evt,node)=>{let value=$(evt.target).val();let p=$(evt.target).attr('name').split('[');let n=p[0];let i=parseInt(p[1]);$(\"[value*='\"+n+\"']\").closest('.tab-pane').find('.tab-content').find(\"[data-idx='\"+i+\"'] >div >input \").val(value).trigger('change')}"

function parseData(data) {
    return JSON.parse(
      data,

      function (key, value) {
        if (typeof value === "string") {
          // only handle specified fields in jsonform
          switch (key) {
            case "onChange":
            case "onClick":
            case "onKeyUp":
              // get the function from the string
              // parens mean don't EXECUTE the function, just get its value
              value = eval("(" + value + ")");
              break;
          }
        }
        return value;
      }
    );
  }

// config socket events
  activesocket.on("json", function (incoming_json) {
    let data = parseData(incoming_json.slice(1, -1));
.
.
.
.
      // replace any form from last connection
      $("#result").html('<form id="result-form" class="form-vertical"></form>');
      // insert the new form
      $("#result-form").jsonForm(data);

//
// used by JSON.stringify
//
function tohandler(key, value) {
  if (typeof value === "function") {
    return value + ""; // implicitly `toString` it
  }
  return value;
}
//
// used by JSON.parse
//
function fromhandler(key, value) {
  if (
    value &&
    typeof value == "string" &&
    (value.startsWith("(") || value.startsWith("function(")) &&
    value.endsWith("}")
  ) {
    return eval("(" + value + ")");
  }
  return value;
}