Revert "remove an unused method"

This reverts commit 7300ba73d3004b8d5c69bd8e3dfbc971c3147ad8.

2 files changed, 8 insertions, 0 deletions

diff --git a/src/embind/emval.js b/src/embind/emval.js
index eb2cae0e..e8ee6baf 100644
--- a/src/embind/emval.js
+++ b/src/embind/emval.js
@@ -57,6 +57,10 @@ function __emval_new_cstring(str) {
     return __emval_register(Pointer_stringify(str));
 }
 
+function __emval_has_property(handle, k) {
+    return _emval_handle_array[handle].value.hasOwnProperty(k);
+}
+
 function __emval_get_property(handle, k) {
     k = Pointer_stringify(k);
     return __emval_register(_emval_handle_array[handle].value[k]);
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));
         }