diff --git a/Cargo.lock b/Cargo.lock
index 116b9e8..9b0bc1e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -195,7 +195,7 @@ dependencies = [
 
 [[package]]
 name = "respo"
-version = "0.1.6"
+version = "0.1.7"
 dependencies = [
  "cirru_parser",
  "js-sys",
diff --git a/respo/Cargo.toml b/respo/Cargo.toml
index e176807..9b0d4fe 100644
--- a/respo/Cargo.toml
+++ b/respo/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "respo"
-version = "0.1.6"
+version = "0.1.7"
 edition = "2021"
 description = "a tiny virtual DOM library migrated from ClojureScript"
 license = "Apache-2.0"
diff --git a/respo/src/node.rs b/respo/src/node.rs
index 273eaec..ca8712e 100644
--- a/respo/src/node.rs
+++ b/respo/src/node.rs
@@ -190,15 +190,21 @@ pub trait RespoAction {
     })
   }
 
+  /// builder for intent actions
   fn build_intent_action(op: Self::Intent) -> Self
   where
-    Self: Sized;
+    Self: Sized,
+  {
+    todo!("build_intent_action need to be implemented when intent({:?}) is used ", op)
+  }
 
   /// a builder for states change
   fn states_action(a: RespoUpdateState) -> Self;
 
   /// handle intent seperately since it might contain effects
-  fn detect_intent(&self) -> Option<Self::Intent>;
+  fn detect_intent(&self) -> Option<Self::Intent> {
+    None
+  }
 }
 
 impl<T> DispatchFn<T>