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Underscore.js _.chain() Function

Last Updated : 23 Jul, 2025
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Underscore.js _.chain() function is an inbuilt function in the Underscore.js library of JavaScript which is used to find a wrapped object. Moreover, invoking the methods on this object will continue to return the wrapped objects until the value is invoked.

Syntax:

_.chain(obj);

Parameters:

  • obj: It is the stated object.

Return Value:

This method returns a wrapped object.

Example 1: In this example, we are using the Underscore.js _.chain() function.

HTML
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" 
          content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!DOCTYPE html>
    <html>

    <head>
        <script src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
        </script>
    </head>

    <body>
        <script>
            console.log(_.chain([99, 3, 4, 6]).push(100)); 
        </script>
    </body>

    </html>

</body>

</html>

Output:

[99, 3, 4, 6, 100]

Example 2: In this example, we are using the Underscore.js _.chain() function.

javascript
<!DOCTYPE html>
<html>

<head>
    <script src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
    </script>
</head>

<body>
    <script>
        let author_article = [
            { author: 'Nidhi1352', articles: 792 },
            { author: 'Nisha95', articles: 590 },
            { author: 'Rohit01', articles: 450 }
        ];

        let experienced = _.chain(author_article)
            .sortBy(function (author_article) { return author_article.article; })
            .map(function (author_article) {
                return author_article.author +
                    ' wrote ' + author_article.articles
                    + ' articles! ';
            })
            .first()
            .value();
        console.log(experienced); 
    </script>
</body>

</html>

Output:

Nidhi1352 wrote 792 articles!

Reference: https://underscorejs.org/#chain


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