Underscore.js _.extendOwn() Function

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The _.extendOwn() function is used to copy only own properties over to the destination object. This function is similar to the _.extend() function.

Syntax:

_.extendOwn(destination, *sources)

Parameters: This function accept two parameters as mentioned above and described below:

destination: This parameter holds the destination object file.
sources: This parameter holds the source object file.

Return Value: It returns a copy of own properties over to the destination object.

Example 1:

<!DOCTYPE html> 
<html> 
  
<head> 
    <script type="text/javascript" src= 
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> 
    </script> 
</head> 
  
<body> 
    <script type="text/javascript"> 
  
        var obj1 = { 
            key1: 'Geeks', 
        }; 
  
        var obj2 = { 
            key2: 'zambiatek', 
        }; 
  
        console.log(_.extendOwn(obj1, obj2)); 
    </script> 
</body> 
  
</html> 

Output:

Example 2:

<!DOCTYPE html> 
<html> 
  
<head> 
    <script type="text/javascript" src= 
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> 
    </script> 
</head> 
  
<body> 
    <script type="text/javascript"> 
  
        var obj1 = { 
            key1: 'Geeks', 
        }; 
  
        var obj2 = { 
            key2: 'zambiatek', 
        }; 
  
        console.log(_.extendOwn({ 
            Company: 'zambiatek', 
            Address: 'Noida' 
        }, { 
            Contact: '+91 9876543210', 
            Email: 'abc@gfg.com' 
        }, { 
            Author: 'Ashok' 
        })); 
    </script> 
</body> 
  
</html> 

Output:

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