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Load comment-reply.js Only When Needed

Stops the threaded comments script from loading on pages that have no open comments or where threading is turned off.

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Code

add_action( 'wp_enqueue_scripts', function () {
    $needed = is_singular() && comments_open() && get_option( 'thread_comments' );

    if ( ! $needed ) {
        wp_dequeue_script( 'comment-reply' );
    }
}, 100 );

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