first commit.

src/utils/storage.ts

@@ -0,0 +1,21 @@
+const localStorage = window.localStorage;
+
+export default {
+  set(key: string, value: any) {
+    localStorage.setItem(key, JSON.stringify(value));
+  },
+  get(key: string) {
+    const content = localStorage.getItem(key);
+    if (content) {
+      return JSON.parse(content);
+    } else {
+      return null;
+    }
+  },
+  remove(key: string) {
+    localStorage.removeItem(key);
+  },
+  clear() {
+    localStorage.clear();
+  },
+};