Add a database proxy

src/db.js

@@ -0,0 +1,27 @@
+(() => {
+	var local = {
+		get: (obj, cb) => {
+			if (typeof obj === 'string') {
+				setTimeout(() => cb(window.localStorage.getItem(obj)), 100);
+			} else {
+				const retVal = {};
+				Object.keys(obj).forEach(key => {
+					let val = window.localStorage.getItem(key);
+					retVal[key] =
+						val === undefined || val === null ? obj[key] : JSON.parse(val);
+				});
+				setTimeout(() => cb(retVal), 100);
+			}
+		},
+		set: (obj, cb) => {
+			Object.keys(obj).forEach(key => {
+				window.localStorage.setItem(key, JSON.stringify(obj[key]));
+			});
+			setTimeout(() => cb(), 100);
+		}
+	};
+	window.db = {
+		local: chrome && chrome.storage ? chrome.storage.local : local,
+		sync: chrome && chrome.storage ? chrome.storage.sync : local
+	};
+})();