On the application _javascript skill of hasOwnProperty method

The hasOwnProperty function method in JavaScript is to return a Boolean value that indicates whether an object has a property of the specified name.

How to use:
Object.hasownproperty (Proname)

Where the Parameter object is a required option. An instance of an object.
Proname is a required option. A string value for a property name.

If object has a property of the specified name, then the hasOwnProperty function method in JavaScript returns True, and vice versa. This method cannot check whether the object's prototype chain has this property, which must be a member of the object itself. In the following example, all String objects share a common split method. The following code prints false and true.

var s = new String ("JScript");
Print (S.hasownproperty ("split"));
Print (String.prototype.hasOwnProperty ("split"));