How to persist svelte store

You can manually create a subscription to your store and persist the changes to localStorage and also use the potential value in localStorage as default value.

Example

<script>
  import { writable } from "svelte/store";
  const store = writable(localStorage.getItem("store") || "");

  store.subscribe(val => localStorage.setItem("store", val));
</script>

<input bind:value={$store} />