Some refactoring

client/components/parameter.js

@@ -5,7 +5,9 @@ import * as taskQueue from "../task-queue";
 
 const component = {
   view: vnode => {
-    const param = vnode.attrs.device[vnode.attrs.parameter];
+    const device = vnode.attrs.device;
+    const parameter = vnode.attrs.parameter;
+    const param = device[parameter];
     if (!param || !param.value) return m("span.na", "N/A");
     let value = param.value[0];
     if (param.value[1] === "xsd:dateTime")
@@ -20,10 +22,8 @@ const component = {
           onclick: () => {
             taskQueue.stageSpv({
               name: "setParameterValues",
-              device: vnode.attrs.device["DeviceID.ID"].value[0],
-              parameterValues: [
-                [vnode.attrs.parameter, param.value[0], param.value[1]]
-              ]
+              device: device["DeviceID.ID"].value[0],
+              parameterValues: [[parameter, param.value[0], param.value[1]]]
             });
           }
         },