Capitalize background scripts

src/background/infrastructures/MemoryStorage.js

@@ -0,0 +1,19 @@
+const db = {};
+
+export default class MemoryStorage {
+  set(name, value) {
+    let data = JSON.stringify(value);
+    if (typeof data === 'undefined') {
+      throw new Error('value is not serializable');
+    }
+    db[name] = data;
+  }
+
+  get(name) {
+    let data = db[name];
+    if (!data) {
+      return undefined;
+    }
+    return JSON.parse(data);
+  }
+}