.. _Object.watch:

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Object.watch
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   void **watch** (:ref:`string` **name**, :ref:`Function` **func**)


Parameters
----------

+----------+--------------------------------------------------------------------+
| **name** | The name of the property to watch.                                 |
+----------+--------------------------------------------------------------------+
| **func** | The function to be called when the value of this property changes. |
+----------+--------------------------------------------------------------------+



Description
-----------

Adds a watch function to a property, which is called when the value changes.

This function can accept, modify, or reject a new value that the user, application, or a script has attempted to place in a property.