diff --git a/src/tools.ts b/src/tools.ts
index 218d4f7..2fa5619 100644
--- a/src/tools.ts
+++ b/src/tools.ts
@@ -1,4 +1,4 @@
-import { toRef, watch, WatchStopHandle } from 'vue'
+import { ref, toRef, watch, WatchStopHandle } from 'vue'
 
 type OptionSetter = (dst: any, key: string, value: any) => void
 
@@ -27,6 +27,17 @@ export function bindObjectProp(
   return watch(r, (value) => { applyObjectProps(dst, value, setter) })
 }
 
+export function bindObjectProps(
+  src: any,
+  dst: any,
+  apply = true,
+  setter?: OptionSetter
+): WatchStopHandle {
+  if (apply) applyObjectProps(dst, src, setter)
+  const r = ref(src)
+  return watch(r, (value) => { applyObjectProps(dst, value, setter) }, { deep: true })
+}
+
 export function setFromProp(o: Record<string, unknown>, prop: Record<string, unknown>): void {
   if (prop instanceof Object) {
     Object.entries(prop).forEach(([key, value]) => {