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Editorial Team
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Asked: 2026-06-13T10:54:36+00:00

Suppose I have a table with fields Rank , Id and Name On clicking

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Suppose I have a table with fields

Rank, Id and Name

On clicking the Rank , the table gets sorted by rank in ascending order using this code

$(function() {
    $("#rank").click(function() {
        var rows = $("#rank_table tbody tr").get();
        rows.sort(sortTable);
        $.each(rows, function(index, row) {
            $("#rank_table").children("tbody").append(row);
        });
    });
});

function sortTable(a, b) {
    var A = parseInt($(a).children('td').eq(0).text());
    var B = parseInt($(b).children('td').eq(0).text());
    if (A < B) return -1;
    if (A > B) return 1;
    return 0;
}

Rank and Id are integers with id rank and st_id respectively.
So, What I want to achieve is that when I click on Rank field once, table gets sorted in ascending order and again clicking it sorts the table in descending order.

I want to do this for both the fields- rank and Id. For descending, do I need to use a different function other than ascending this ascending function.

How can I achieve this using jQuery and this sort() function(not plugins)?

Here is the html

<!Doctype html>
<html>
<head>
    <style>
        #thead {
            cursor: pointer;
            text-decoration: underline;
            text-align: center;
        }

        #tbody {
            text-align: center;
        }
    </style>
    <script src="libs/jquery-1.5.1.js" type="text/javascript"></script>
    <script src="table_sort.js" type="text/javascript"></script>
</head>

<body>
    <table id="rank_table">
        <thead id="thead">
            <tr>
                <th id="rank">Rank</th>
                <th id="st_id">Student_id</th>
                <th id="st_name">Name</th>
            </tr>
        </thead>
        <tbody id="tbody">
            <tr>
                <td>3</td>
                <td>2</td>
                <td>Ted</td>
            </tr>
            <tr>
                <td>2</td>
                <td>1</td>
                <td>John</td>
            </tr>
            <tr>
                <td>5</td>
                <td>4</td>
                <td>Neil</td>
            </tr>
            <tr>
                <td>1</td>
                <td>5</td>
                <td>Alex</td>
            </tr>
            <tr>
                <td>4</td>
                <td>3</td>
                <td>Nave</td>
            </tr>
        </tbody>
    </table>

</body>

</html>
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1 Answer

  1. Editorial Team

    If your current function sorts it ascending, you should only have to change your if statements to get it descending? 

    if (A > B) return -1;
if (A < B) return 1;

    This works the way you want:

    $(function() {
    $("#rank").on('click', function() {
        var rows = $("#rank_table tbody tr").get();
        rows.sort(sortTable);
        $.each(rows, function(index, row) {
            $("#rank_table").children("tbody").append(row);
        });
        if (ascending) {
            ascending = false;
        } else {
            ascending = true;
        }
    });
});

var ascending = false;

function sortTable(a, b) {
    var A = parseInt($(a).children('td').eq(0).text(), 10);
    var B = parseInt($(b).children('td').eq(0).text(), 10);


    if (ascending) {
        if (A > B) return 1;
        if (A < B) return -1;
    } else {
        if (A > B) return -1;
        if (A < B) return 1;
    }
    return 0;

}
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