The JavaScript WeakMap Constructor property is used to return the constructor function for the weakmap object. For JavaScript WeakMaps the constructor property returns: function WeakMap() { [native code] }.

The WeakMap constructor's return value is a reference value to the function, not the name of the function.

Syntax

Following is the syntax of JavaScript WeakMap Constructor property −

weakmap.constructor

Here, weakmap is a weakmap.

Return value

This property returns the constructor function for the specified weakmap.

Example

The following example demonstrates the basic usage of JavaScript WeakMap constructor property −

<html>
<body>
   <script>
      const myWeakMap = new WeakMap();
      const constructor = myWeakMap.constructor;
      document.write(constructor);
   </script>
</body>
</html>

If we execute the above program, it returns the constructor function for the provided weakmap.