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The following code can be used to modify the grid's items to only include products listed as "In Stock". Only Applicable for WooCommerce Product Grids.

1. Get your grid's ID.

2. Add the following code to your theme's "functions.php" file, modifying the number "1" with your grid's ID.

add_filter('essgrid_modify_posts', 'eg_mod_posts', 10, 2);
 
function eg_mod_posts($posts, $grid_id) {
 
    // only process if Grid ID equals "1"
    if($grid_id == 1) {
 
        $products = array();
 
        foreach($posts as $post) {
 
            $id = $post['ID'];
            $meta = get_metadata('post', $id);
 
            if($meta['_stock_status'][0] == 'instock') {
 
                $products[] = $post;
 
            }
 
        }
 
        return $products;
 
    }
 
    return $posts;
 
}

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