1 files changed, 11 insertions, 0 deletions
diff --git a/examples/06-custom-effects/src/app.ffi.mjs b/examples/06-custom-effects/src/app.ffi.mjs
new file mode 100644
index 0000000..c401b99
--- /dev/null
+++ b/examples/06-custom-effects/src/app.ffi.mjs
@@ -0,0 +1,11 @@
+import { Ok, Error } from "./gleam.mjs";
+
+export function read_localstorage(key) {
+  const value = window.localStorage.getItem(key);
+
+  return value ? new Ok(value) : new Error(undefined);
+}
+
+export function write_localstorage(key, value) {
+  window.localStorage.setItem(key, value);
+}