Add browser-specific entry point

src/platforms/browser.js

@@ -0,0 +1,36 @@
+import { Context, SAVE_KEY } from "../context.js";
+import { log } from "../shared.js";
+import { initializeApplication } from "../application";
+
+/**
+ * @typedef {import('../application.js').BirbSaveData} BirbSaveData
+ */
+
+export class LocalContext extends Context {
+
+	/**
+	 * @override
+	 * @returns {Promise<BirbSaveData|{}>}
+	 */
+	async getSaveData() {
+		log("Loading save data from localStorage");
+		return JSON.parse(localStorage.getItem(SAVE_KEY) ?? "{}");
+	}
+
+	/**
+	 * @override
+	 * @param {BirbSaveData} saveData
+	 */
+	async putSaveData(saveData) {
+		log("Saving data to localStorage");
+		localStorage.setItem(SAVE_KEY, JSON.stringify(saveData));
+	}
+
+	/** @override */
+	resetSaveData() {
+		log("Resetting save data in localStorage");
+		localStorage.removeItem(SAVE_KEY);
+	}
+}
+
+initializeApplication(new LocalContext());