woocommerce_ajax_variation_threshold │ filter-hook │ WC 9.7.0

Allows you to change the variation-count threshold after which product variations are loaded via AJAX rather than immediately.

Default behavior:

• If there are < 30 variations:

  • The drop-down lists (such as “Color” and “Size”) are dynamic.
  • After selecting one attribute, the others update through AJAX and show only available options.

• If there are ≥ 30 variations:

  • The drop-down lists are static — they show all options, including unavailable ones.
  • Selecting an unavailable combination shows an error message: “Sorry, no products matched your selection. Please choose a different combination”.

This limitation is intended to optimize performance on sites with many variations.

This filter lets you change the limit from 30 to another number, for example, 100:

add_filter( 'woocommerce_ajax_variation_threshold', fn() => 100 );

Usage

add_filter( 'woocommerce_ajax_variation_threshold', 'wp_kama_woocommerce_ajax_variation_threshold_filter', 10, 2 );

/**
 * Function for `woocommerce_ajax_variation_threshold` filter-hook.
 * 
 * @param  $30      
 * @param  $product 
 *
 * @return 
 */
function wp_kama_woocommerce_ajax_variation_threshold_filter( $30, $product ){
	// filter...
	return $30;
}

$threshold(int)

Maximum number of variations to load upfront.

$product(WC_Product)

Product object.

Examples

#1 Change the number of product variations displayed at once

add_filter( 'woocommerce_ajax_variation_threshold', 'custom_wc_ajax_variation_threshold', 10, 2 );
function custom_wc_ajax_variation_threshold( $qty, $product ) {
	return 40;
}