chore(ui): migrate more code to typescript

ui/src/Common/Device.ts

@@ -1,4 +1,4 @@
-function IsMobile() {
+function IsMobile(): boolean {
   return window.innerWidth < 768;
 }
 

ui/src/Common/Fetch.ts

@@ -14,7 +14,13 @@ const FetchRetryConfig = {
   maxTimeout: 5000,
 };
 
-const FetchGet = async (uri, options, beforeRetry) =>
+type PreRetryCallback = (number: number) => void;
+
+const FetchGet = async (
+  uri: string,
+  options: RequestInit,
+  beforeRetry: PreRetryCallback
+) =>
   await promiseRetry(
     (retry, number) =>
       fetch(

ui/src/Common/Query.ts

@@ -14,7 +14,7 @@ const StaticLabels = Object.freeze({
   SilenceID: "@silence_id",
 });
 
-function FormatQuery(name, operator, value) {
+function FormatQuery(name: string, operator: string, value: string) {
   return `${name}${operator}${value}`;
 }
 

ui/src/Common/Select.js

@@ -1,5 +0,0 @@
-const NewLabelName = (v) => `New label: ${v}`;
-
-const NewLabelValue = (v) => `New value: ${v}`;
-
-export { NewLabelName, NewLabelValue };

ui/src/Common/Select.ts

@@ -0,0 +1,5 @@
+const NewLabelName = (v: string) => `New label: ${v}`;
+
+const NewLabelValue = (v: string) => `New value: ${v}`;
+
+export { NewLabelName, NewLabelValue };