Question (1)  if the data is send by controller to js using ajax using format json
      then in js how to access array json data 

	$data['state'] = $state;
        $data['city'] = $city;
        $data['streetaddress'] = $streetaddress;
        $data['pincode'] = $pincode;
	print_r(json_encode($data));


Answer  (1)

	jQuery.ajax({
                        type: "POST",
                        dataType: "json",
                        url: baseUrl + 'index/geolocationaccess', 
                        data: JSON.stringify(requestData),
                        success: function(response) {
                            document.getElementById("sel1").value = response.state;
                            document.getElementById("street_add").value = response.streetaddress;
                            document.getElementById("pin_code").value = response.pincode;
                            LAT1 = response.LAT1;
                            LNG1 = response.LNG1;
                            LAT2 = response.LAT2;
                            LNG2 = response.LNG2;
                            getChangeAreaForGeolocation(LAT1,LNG1,LAT2,LNG2);
                            

                        }
                    });
Q no 2   if  Data is returned by Ajax request is  like this (ABOVE)
               {"pincode_details":{"aadhaar_pincode_id":"1","aadhar_pincode":"231501",
               "pincode_devision":"Mirzapur","pincode_region":"Allahabad","pincode_area":"Sadar",
               "pincode_district":"Mirzapur","pincode_circle_name":"Uttar Pradesh",
               "pincode_remarks":"Local","pincode_circle_code":"UK",
              "pincode_gst_state_code":"UP"},"status":"success"}

Ans To display at front end 
              response.pincode_details['pincode_devision'];                    
                

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