Can update device general information

central_frontend/src/utils/StringsUtils.ts

@@ -0,0 +1,8 @@
+import { LenConstraint } from "../api/ServerApi";
+
+/**
+ * Check whether a string length is valid or not
+ */
+export function lenValid(s: string, c: LenConstraint): boolean {
+  return s.length >= c.min && s.length <= c.max;
+}