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Underscore.js _.bind() Function

Last Updated : 12 Jul, 2025
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Underscore.js _.bind() function is used to bind a function to an object. When the function is called, the value of this will be the object.

Syntax:

_.bind(function, object, *arguments);

Parameters:

  • function: This parameter holds the function that needs to be executed.
  • object: This parameter holds the object elements.
  • arguments: This parameter needs to add some symbols between the elements.

Return Value:

It returns the value that binds a function to an object.

Example 1: The below code example is the basic implementation of the _.bind() function in underscore.js.

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">

        let fun = function (Geeks) {
            return 'Company Name : ' + this.Company
                + '\nAddress : ' + this.Address
                + '\nContact : ' + this.Contact
        };

        fun = _.bind(fun, {
            Company: 'GeeksforGeeks',
            Address: 'Noida',
            Contact: '+91 9876543210'
        });

        console.log(fun()); 
    </script>
</body>

</html>

Output:

Example 2: The below code is another implementation of the _.bind() method.

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">
        const obj = {
            Name: "GeeksforGeeks",
            Address: "Noida"
        };

        let fun = function (Geeks) {
            return 'Welcome to ' + this.Name
                + '\nAddress: ' + this.Address
        };

        fun = _.bind(fun, obj);

        console.log(fun()); 
    </script>
</body>

</html>

Output:


A
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