Underscore.js _.allKeys() Function

Last Updated : 25 Nov, 2021
The _.allKeys() function is used to return all keys of the object and inherited properties. Syntax: 
_.allKeys( object )
Parameters: This function accept oa single parameter as mentioned above and described below:
  • object: It contains the object element that holds the elements of key and value pair.
Return Value: It returns all key of the object and inherited properties. Below examples illustrate the _.allKeys() function in Underscore.js: Example 1: html 
<!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: "GeeksforGeeks",
            Address: "Noida",
            Contact: "+91 9876543210",
            Email: "abc@gfg.com"
        }
        console.log(_.allKeys(obj));
    </script>
</body>

</html>
Output: Example 2: html 
<!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">

        function Geeks(name) {
            return this.name = name;
        }

        Geeks.prototype.GeeksforGeeks = true;

        console.log(_.allKeys(new Geeks("Company")));
    </script>
</body>

</html>
Output:
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