1 files changed, 29 insertions, 0 deletions
diff --git a/src/lib/hmr-stores.js b/src/lib/hmr-stores.js
new file mode 100644
index 0000000..9cd6d0e
--- /dev/null
+++ b/src/lib/hmr-stores.js
@@ -0,0 +1,29 @@
+// Customized HMR-safe stores
+// Based off https://github.com/svitejs/svite/blob/ddec6b9/packages/playground/hmr/src/stores/hmr-stores.js
+import { writable } from 'svelte/store'
+
+/**
+ * @type { Record<string, import('svelte/store').Writable<any>> }
+ */
+let stores = {}
+
+/**
+ * @template T
+ * @param { string } id
+ * @param { T } initialValue
+ * @returns { import('svelte/store').Writable<T> }
+ */
+export function getStore(id, initialValue) {
+  return stores[id] || (stores[id] = writable(initialValue))
+}
+
+// preserve the store across HMR updates
+if (import.meta.hot) {
+  if (import.meta.hot.data.stores) {
+    stores = import.meta.hot.data.stores
+  }
+  import.meta.hot.accept()
+  import.meta.hot.dispose(() => {
+    import.meta.hot.data.stores = stores
+  })
+}