improve code a bit

Author: Stefania

home.html

@@ -23,17 +23,19 @@
                 jsonMsg = JSON.parse(msg);
                 portsListing = jsonMsg.Ports;
             } catch {
+                // no valid json
             }
 
             var startsWithList = msg.indexOf('list') == 0;
 
             if (listenabled.checked || (!portsListing && !startsWithList)) {
                 let printMsg = msg;
                 if (jsonMsg.Ports) {
+                    const validKeys = ['Name', 'SerialNumber', 'IsOpen', 'VendorID', 'ProductID'];
                     if (jsonMsg.Network) {
-                        printMsg = `<b>Network Ports</b>:<br>${JSON.stringify(jsonMsg.Ports, ['Name', 'SerialNumber', 'IsOpen', 'VendorID', 'ProductID'], 2)}`
+                        printMsg = `<b>Network Ports</b>:<br>${JSON.stringify(jsonMsg.Ports, validKeys, 2)}`
                     } else {
-                        printMsg = `<b>Serial Ports</b>:<br>${JSON.stringify(jsonMsg.Ports, ['Name', 'SerialNumber', 'IsOpen', 'VendorID', 'ProductID'], 2)}`
+                        printMsg = `<b>Serial Ports</b>:<br>${JSON.stringify(jsonMsg.Ports, validKeys, 2)}`
                     }
                 } else if (Object.keys(jsonMsg).length !== 0) {
                     printMsg = `${JSON.stringify(jsonMsg, undefined, 2)}`;