WordPress at a glance
filter is not described

woocommerce_order_item_class filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_order_item_class', 'filter_function_name_3788', 10, 3 );
function filter_function_name_3788( $string, $item, $order ){
	// filter...

	return $string;
}
$string
-
$item
-
$order
-

Where the hook is called

In file: /templates/emails/email-order-items.php
woocommerce_order_item_class
woocommerce/templates/emails/email-order-items.php 40
<tr class="<?php echo esc_attr( apply_filters( 'woocommerce_order_item_class', 'order_item', $item, $order ) ); ?>">
woocommerce/templates/checkout/form-pay.php 40
<tr class="<?php echo esc_attr( apply_filters( 'woocommerce_order_item_class', 'order_item', $item, $order ) ); ?>">
woocommerce/templates/order/order-details-item.php 26
<tr class="<?php echo esc_attr( apply_filters( 'woocommerce_order_item_class', 'woocommerce-table__line-item order_item', $item, $order ) ); ?>">

Where in WP core the hook is used WooCommerce

Usage not found.