Unsuccessful shot at using localStorage

It might work in a browser but not server side

src/lib/stores/todos.js

@@ -1,3 +1,31 @@
+import { onMount } from 'svelte';
 import { writable } from "svelte/store";
 
+const localStore = (key, initial) => {
+    const toString = (value) => JSON.stringify(value, null, 2);
+    const toObject = JSON.parse;
+
+    if(process.browser) {
+        if (localStorage.getItem(key) === null) {
+            localStorage.setItem(key, toString(initial))
+        }
+
+        const saved = toObject(localStorage.getItem(key));
+
+        const { subscribe, set, update } = writable(saved);
+
+        return {
+            subscribe,
+            set: value => {
+                // both return and save in the local storage
+                localStorage.setItem(key, toString(value));
+                return set(value)
+            },
+            update
+        }
+    }
+}
+
+// export const todos = localStore('todo-store', []);
+console.log("here we are: " + typeof window);
 export const todos = writable([]);