diff --git a/src/js/async.mbt b/src/js/async.mbt
index c120c6d..5daae28 100644
--- a/src/js/async.mbt
+++ b/src/js/async.mbt
@@ -37,6 +37,17 @@ pub fn Promise::new[T](op : async () -> T!) -> Promise {
   Promise::new_ffi(fn() { Value::cast_from(op!!()) })
 }
 
+///|
+pub fn spawn_detach[T, E : Error](op : async () -> T!E) -> Unit {
+  async_run(fn() {
+    try {
+      op!!() |> ignore
+    } catch {
+      _ => ()
+    }
+  })
+}
+
 ///|
 extern "js" fn Promise::new_ffi(op : async () -> Value!) -> Promise =
   #| (op) => new Promise((k, ke) => op(k, ke))
diff --git a/src/js/js.mbti b/src/js/js.mbti
index b8350fd..dbb6433 100644
--- a/src/js/js.mbti
+++ b/src/js/js.mbti
@@ -19,6 +19,8 @@ let iterator : Symbol
 
 fn require(String, keys~ : Array[String] = ..) -> Value
 
+fn spawn_detach[T, E : Error](() -> T!E) -> Unit
+
 fn suspend[T, E : Error](((T) -> Unit, (E) -> Unit) -> Unit) -> T!E
 
 // Types and methods