Function and usage of comments_popup_script() in wordpress


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    The comments_popup_script() function in WordPress is designed for use with themes that feature a pop-up window for comments. This function displays the necessary JavaScript to enable a pop-up window when a user clicks on the comments link.

    Detailed Explanation:

    • Purpose: comments_popup_script() is used to generate and include JavaScript that opens a new pop-up window for displaying comments. This is particularly useful for themes where comments are not shown on the main post page but in a separate pop-up window.

    • Usage: Typically, this function is called in the header of the WordPress theme (header.php) so that the JavaScript is available throughout the site.

    • Parameters: It accepts two optional parameters:

      1. width: The width of the pop-up window in pixels.
      2. height: The height of the pop-up window in pixels.

      These parameters allow you to control the size of the comment pop-up window.

    • Return Value: The function does not return a value; it directly outputs the JavaScript.

    Sample Usage:

    To use comments_popup_script(), you would typically include it in your theme’s header.php file. Here’s a basic example:

    <!DOCTYPE html>
    <html <?php language_attributes(); ?>>
        // Including the comments popup script
        comments_popup_script(600, 400); // width = 600px, height = 400px

    In this example, the comments_popup_script() function is called with a width of 600 pixels and a height of 400 pixels. This means that when a user clicks on the comments link in a post, a new pop-up window will open with these dimensions to show the comments.


    • Theme Compatibility: It’s important to note that this function is somewhat outdated and may not be compatible with all modern WordPress themes, especially those that are fully responsive or use AJAX for comments.

    • Pop-up Blockers: Many modern browsers have pop-up blockers that might prevent the comment pop-up window from appearing. It’s essential to keep this in mind as it might affect user experience.

    • Alternative Approaches: Modern WordPress themes tend to use AJAX and other more seamless methods for displaying comments without the need for a separate pop-up window. Therefore, the usage of comments_popup_script() has declined in recent years.

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