Underscore.js _.keys() Function

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The _.keys() function is used to return the list of all keys of the given object.

Syntax:

_.keys( object )

Parameters: This function accept a single parameter as mentioned above and described below:

object: It contains the object elements.

Return Value: This function returns the list of all key of the given object.

Below examples illustrate the _.Keys() function in Underscore.js
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 obj = { 
            Company: "zambiatek", 
            Address: "Noida", 
            Contact: "+91 9876543210", 
            Email: "abc@gfg.com" 
        } 
        console.log(_.keys(obj)); 
    </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 key = _.keys({ 
            Name: "Ashok", 
            Address: "Noida", 
            Mobile: "+91 9876543210", 
            Email: "zambiatek@gmail.com" 
        }); 
  
        console.log(key); 
    </script> 
</body> 
  
</html> 

Output:

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