move utility methods to @/utils

src/utils/useLocalStorage.ts

@@ -0,0 +1,25 @@
+/**
+ * Retrieeves the value of a key from localStorage.
+ * @param key the key to read from local storage
+ * @returns A javascript object representing the value stored in local storage
+ */
+export function readLocalStorage(key: string) {
+  return JSON.parse(localStorage.getItem(key));
+}
+
+/**
+ * Stores a value in localStorage.
+ * @param key the key to store the value in local storage
+ * @param value the value to store in local storage
+ * @returns true if the value was successfully stored, false otherwise
+ * @throws if the value is not a valid JSON string
+ */
+
+export function writeLocalStorage(key: string, value: any) {
+  try {
+    localStorage.setItem(key, JSON.stringify(value));
+    return true;
+  } catch (e) {
+    return false;
+  }
+}