1 files changed, 9 insertions, 0 deletions
diff --git a/crates/shirabe-external-packages/src/react/promise/promise_interface.rs b/crates/shirabe-external-packages/src/react/promise/promise_interface.rs
new file mode 100644
index 0000000..bb604a8
--- /dev/null
+++ b/crates/shirabe-external-packages/src/react/promise/promise_interface.rs
@@ -0,0 +1,9 @@
+use shirabe_php_shim::PhpMixed;
+
+pub trait PromiseInterface {
+    fn then(
+        &self,
+        on_fulfilled: Option<Box<dyn FnOnce(Option<PhpMixed>) -> Option<PhpMixed>>>,
+        on_rejected: Option<Box<dyn FnOnce(Option<PhpMixed>) -> Option<PhpMixed>>>,
+    ) -> Box<dyn PromiseInterface>;
+}