1 files changed, 4 insertions, 0 deletions
diff --git a/system/include/emscripten/val.h b/system/include/emscripten/val.h
index 91becb4f..e2d35382 100644
--- a/system/include/emscripten/val.h
+++ b/system/include/emscripten/val.h
@@ -84,6 +84,10 @@ namespace emscripten {
             return *this;
         }
 
+        bool exist(const char* key) const {
+            return internal::_emval_has_property(handle, key);
+        }
+
         val get(const char* key) const {
             return val(internal::_emval_get_property(handle, key));
         }