WooCommerce Mix and Match Products

• Dev Feature: add filter for error quantity validation message
• Fix: numerical agreement in error messages

• New: Use _prime_post_caches() to boost speed of fetching child products.
• Fix: Only add indent wrapping div to product name if it doesn't already exist. Prevent multiple sub-arrows from displaying when coupons fail.
• Fix: Php 8 compat: Required parameter follows optional parameter.
• Fix: Fixed PHP warnings about admin notices.
• Fix: Add margin reset to in single product page.
• Dev: Add get_props_to_meta_keys() getter to data store class.

2020-12.07 - version 1.10.6

• Fix - Grand total calculations for containers + Product Addons.
• Fix - Prevent double discounts when discounting from sale price.
• Fix - Harden calls to init gallery on child product images to prevent Uncaught TypeError: .wc_product_gallery is not a function.
• Fix - Use wc_product_class() for opening child item divs/rows. Restores compat with filters mini-extension.
• Fix - Min/Max Quantities compatibility - ignore rules on variations too.
• Fix - Add RTL Language style data.

• Fix: ShipStation exports of per-item priced, packed-together containers reported the container line at double its value. Packaged child totals were aggregated into the container twice, introduced in 2.9.0.

• Update: Tested up to WooCommerce 11.1.0 and WordPress 7.1.0.
• Fix: Subscription details (e.g. "/ month") dropped from the container price string after any quantity change on a fixed-price container with a single forced subscription plan (Subscriptions 9 / All Products for Subscriptions).

• Fix: Undefined variable $child_order_item_id PHP warning in wc_mnm_get_order_item_container() on every uncached lookup, introduced by a stale merge in 2.9.0.
• Fix: Fatal error rendering any Print Invoices and Packing Lists document when PIP is older than 3.14.3, introduced by a stale merge in 2.9.0.
• Fix: wc_mnm_order_item_container_size_meta_value filter parameters corrected to container level $args, $container_item_hash.
• Fix: Remove unused $context param from is_in_stock() and is_purchasable() methods in the WC_MNM_Child_Item class.
• Fix: Add missing _wc_mnm_packing_mode meta key when creating a new order item for a Mix and Match product in the admin.

• Warning: WC_Product_MNM_Data_Store_CPT::query_containers_by_product() now returns a non-associative array.
• New: Optionally restrict products to sale only as part of Mix and Match bundles. Previously handled by Not Sold Separately mini-extension. If you were using this mini-extension, please disable it and run the data update routine.
• New: Category contents will automatically include variations of variable products in that selected category. Use add_filter( 'wc_mnm_category_child_items_include_variations', '__return_false' ); filter to disable this behavior. #551.
• Update: Tested up to WooCommerce 11.0.0.
• Update: Revamp Print Invoices and Packing Lists integration styles.
• Revamp Edit in Cart flow. Introduce wc_mnm_edit_in_cart_redirect_to_cart filter to disable redirecting to cart after editing price in cart. Disable by default if doing ajax. Hopefully this works better with side cart type plugins.
• Fix: Load frontend subscriptions compatibility scripts in Subscriptions 9.
• Fix: Failure to calculate subscription prices if a child item is not purchasable.
• Fix: Update query_containers_by_product() to handle when a product is using category contents. #577.
• Fix: Update add-to-cart/mnm-add-to-cart-button.php and mnm-container-status.php templates to hide Add to cart button when container is not purchasable. #597.
• Fix: Give thumbnails a minimum size. #598
• Fix: Suppress quantity change notifications for child items when modifying cart quantity of container. #596.
• Fix: Category-sourced container shows the wrong category heading when a category's items are all out of stock #606.
• Tweak: Use stock.php template to display child item status.
• Tweak: Convert frontend font characters to HTML characters. Removes need to load a font file for the frontend.

• Fix: Fatal error with Subscriptions 9.0. #609.

• Fix: All Products for WooCommerce Subscriptions wc-mnm-validation-status-changed event callback not firing, fixes hide/show of schemes.
• Fix: Do not display $0.00 price as Free! for per-item priced containers unless enabled via add_filter( 'wc_mnm_container_show_free_string', '__return_true' );
• Fix: Launch PayPal compatibility module to disable Smart Pay Buttons on Name Your Price products.
• Tweak: Replace wc_mnm_show_free_string with existing wc_mnm_container_show_free_string filter.

• Update: Tested up to WooCommerce 9.9.0 and WordPress 6.9.0.
• Fix: Incorrect quantities when editing from cart with an unlimited container size.
• Fix: Missing container script update when child item quantity is changed after reset, specifically if initial quantity was 1, reset to 0, then set to 1 again.
• Fix: Ignore wc_mnm_child_item_quantity_input_default_value when editing container in cart.
• Tweak: Add core hooks for woocommerce_remove_cart_item and woocommerce_restore_cart_item.
• Tweak: Align order of wc_mnm_cart_item_removed and wc_mnm_cart_item_restored hooks to core pattern.
• Tweak: Wrap child item titles in the classic cart in instead of .

• Fix: indent of child items on classic/non-block order received. Closes #590 and Print Invoices child item duplication.

• Fix: Incorrect calculation of min/max price strings for per-item-priced containers, introduced by 76182b865287063411d30a795cd253a43355f2c2.
• Fix: Add order=>include to get_terms() in Store API response to respect saved term order of child items.
• Tweak: Update Query Monitor compatibility module to use core QM functionality and styles.
• Tweak: Add styles for Twenty Twenty Five theme. Closes #586.
• Tweak: Give grid style to Variation for child products. Closes #587.

• Fix: Undefined WP_MNM_Cache class when using Not Sold Separately mini-extension.
• Fix: Order of child categories in Store API response respects saved order.
• New: Query Monitor compatibility module to log database queries made by Mix and Match Products. Requires Query Monitor plugin to be active.
• Tweak: Update admin strings from WooCommerce Mix and Match Products to Mix and Match Products for WooCommerce.

• Fix: Hide price of child items in cart block if not priced per item.
• Tweak: Add theme button class to edit selections button in cart block.
• Tweak: Improve Flatsome theme compatibility for plus/minus buttons.

• New: Introduce minimalist cart display mode for cart block and side cart blocks. Enable via add_filter( 'wc_mnm_enable_minimal_cart_display', '__return_true' );
• Fix: Fatal error: Uncaught Exception stock validtation in trait-wc-mnm-container-validation.php.
• Fix: Revert wc()->is_store_api_request() usage. It's giving false postives.
• Fix: Incorrect block theme detection logic was hiding full-width layouts for non-block themes.
• Fix: Incorrect context sent to wc_mnm_container_validation_context filter was forcing add to cart stock checking on woocommerce_check_cart_items.
• Tweak: Add theme button classes to View Cart error notice.

• IMPORTANT: PHP 7.4 is required | WordPress 6.2.0 is required | WooCommerce 8.2.0.
• Update: Please update any mini-extensions to their latest versions.
• Update: Tested up to WooCommerce 10.2.0.
• Update: Strings updated, please check your translations.
• New: Use transients to store DB queries. Improves single page and cart block performance.
• New: Introduce sanitize_configuration(), is_valid_configuration(), and validate_configuration() methods to WC_Product_Mix_and_Match class. Use these instead of WC_MNM_Cart methods.
• New: Add support for adding Mix and Match products to existing subscriptions where supported.
• Fix: When no quantity restrictions, still check for changes between add to cart|cart config and allowed config. Closes #555.
• Breaking: wc_mnm_child_item_quantity_name_prefix filter is deprecated with no exact replacement though wc_mnm_quantity_name_prefix will be similar with different args.
• Tweak: Reduce order notes created when editing containers is admin. Use add_filter( 'wc_mnm_log_container_config_changes_in_order_notes', '__return_false' ); to disable notes entirely. Closes #552.
• Tweak: Revert back to using wc_mnm_get_child_input_name() to generate input names. Child item class method get_input_name() is deprecated.
• Tweak: Update single-product/mnm/grid/mnm-items-wrapper-open.php and single-product/mnm/grid/mnm-items-wrapper-close.php template to use woocommerce_product_loop_start() and woocommerce_product_loop_end() respectively to open/close child item loops when those provide elements. Improves theme compatibility.
• Tweak: Default to removing .has-flex class from container grid. Use `add_filter( 'wc_mnm_grid_has_flex_layout', '__return_true' ); filter to re-enable. Should improve theme compatibility.
• Tweak: Remove layout override options from individual products unless currently in use. Can be restored with add_filter( 'wc_mnm_show_layout_override_options', '__return_true' );
• Tweak: Replace "Starting at $x" strings with core wc_get_price_html_from_text().
• Tweak: Stop showing discounts and sale ranges together by default, $5.00 – $9.00 $10.00 – $20.00. Can restore with add_filter( 'wc_mnm_container_show_discounted_range_price', '__return_true' );

• Fix: wc_current_theme_is_fse_theme() is deprecated, use wp_is_block_theme() if it exists.
• Fix: Untranslatable Free! string.
• Fix: Prevent updating container configuration from admin or customer subscription if there's no actual configuration change.
• Tweak: Simplify order notes when editing container configuration from admin or customer subscription editing.

• Fix: Fatal error in compatibility with Force Sells when displaying force sells on a child item product.
• Fix: Incorrect add to cart error when mix and match container has unsynced force sells.

• Update: Tested up to WooCommerce 9.9.0.
• New: Force Sells for WooCommerce compatibility.
• Fix: Incorrect class instantiation in admin when product is not mix-and-match type.
• Fix: Escape any remaining translatable strings.
• Change: Move woocommerce_after_cart_item_quantity_update callback to earlier priority for Force Sells compatibility.
• Change: wc-add-to-cart-mnm script params use booleans instead of yes|no strings. Advanced script integrations should re-test.
• Tweak: Update sass files to use Dart Sass.

• Fix: Write error to WooCommerce>Status>Logs if child item cannot be saved to DB.
• Fix: Show an admin notice in product editor if child items cannot be saved.
• Fix: Show update notice in product metabox.
• Tweak: Harden foreign key checking on update.

• Update: Tested up to WooCommerce 9.2.0.
• Fix: Remove image link from thumbnail if theme does not support wc-product-gallery-lightbox.
• Fix: Set validation context to cart if $_GET['update-container'] is set. Fixes display of button text in mobile footer plugin when editing in cart.
• Fix: Change form validation context to edit when switching subscriptions.

• Fix: Cart validation error when adding multiples of pack with same configuration.

• Fix: Show parent thumbnail for variations without thumbnail.

• New: Introduce styling for Mix and Match products in Receipt Rendering engine.
• Fix: Resolved a fatal error triggered with WooCommerce 9.1, when tracking and legacy Order data storage were enabled.
• Fix: Harden validation of mix and match container that's already in cart.
• Fix: Show placeholder image if child product has no thumbnail.
• Tweak: Slight simplification to add to cart validation error strings( "You have selected too many items" and "You have selected too few items"). Double check your translations for to

• Fix: Incorrect quantity input value when editing a mix and match container in cart. #536.
• Fix: Remove permalinks from child items in the cart block.
• Tweak: As a last resort, attempt to get posted quantity from string inputs, ie: "mnm_quantity[99]" which commonly happens when themes attempt ajax add to cart.
• Tweak: Rename wp.hooks action wc-mnm-initialize.${product_type} to wc.mnm.initialize.${product_type}
• Tweak: Tell wc-add-to-cart script params to redirect to cart when editing a container in the cart.

• Fix: When creating duplicate product, limit duplicating child items to custom DB table if using products as contents source.
• Fix: Missing container contents list in checkout block on initial page load.
• Fix: Fix pay-for-order conflict with WooPayments.

• New: Introduce wc_mnm_container_get_cart_edit_link filter and add APFS subscription parameters to edit in cart link.
• Fix: Handle missed dynamic properties missed in 2.7.0 objects.
• Tweak: Update edit-container.php template.
• Tweak: Parameter for wc.mnm.initialize.${type} wp.hook is now an object.

• Important: Requires WordPress 5.0.
• New: Eliminated dynamic properties on objects. Resolves warning notices in PHP 8.2+. (Important! If using Not Sold Separately, you will need to upgrade to 2.4 of later: https://github.com/kathyisawesome/wc-not-sold-separately/releases/latest)
• New: Introduce wp.hooks actions wc-mnm-initialize.${product_type} and wc.mnm.container.container-updated and filter wc.mnm.container.update_order_item_data for compatibility with mini-extensions. NB: This replaces the experimental wc_mnm_update_container_order_item_data triggerHandler and the Javascript wc-mnm-initialize.${product_type} custom event in the order metabox scripts.
• Fix: Show child item availability/stock status if container has insufficient stock.
• Tweak: Add grayscale effect to out of stock child items.
• Tweak: Style compatibility tweak for quantity input alignment in Twenty TwentyFour theme.

• Fix: Adding/editing container contents in Order admin.

• Fix: Properly close markup after edit in cart link.

• Fix: Incorrect validation always preventing packs containing any sold individually child item from being added to cart. #516.
• Tweak: Use wc_mnm_is_product_container_type() in store API class for future extensibility.
• Tweak: Always add the validation context as data attribute on to the form.

• Update: Tested up to WooCommerce 8.2.0.
• Fix: Update all templates for safer string escaping.
• Fix: Update KIA Customizer Range Input package to better limit number of columns in Customizer input.
• Fix: Prevent overfilling of pack on pre-filled packes (pre-filled by URL param).
• Fix: Enqueue order editing scripts on Subscriptions page when using HPOS.
• Tweak: Use admin theme colors in product edit admin.
• Tweak: Slight change to when global mix and match product object is generated in edit screen.

• Fix: Format the container line total for per-item priced containers with correct decimal setting in the cart block.
• Fix: Order item editing script not loaded on HPOS new order page.
• Fix: Introduce WC_MNM_Core_Compatibility::get_post_or_object_meta() to better support older versions of WC.
• Fix: Suppress item removed popup notifications for child items in Cart Block when Container is removed. #505.
• Tweak: Important: The 'Form Location' option is no longer supported when using a block theme. Use the following snippet to force its use: 'add_filter( 'wc_mnm_has_legacy_product_template', '__return_true' );' #503.
• Tweak: Hide points and rewards message when container has a minimum of 0 points.
• Tweak: Rename css class for child items in documents generated by Print Invoices and Packing lists.

• Fix: Problem with plus/minus buttons not being able to reset back to 0.
• Fix: Default to using Astra's plus/minus buttons when active.

• Fix: Prevent double display of "Edit Selections" button that was introduced by WooCommerce 7.8.

• Fix: PHP Fatal error: Uncaught Error: Attempt to modify property "data" in REST API product response in PHP 8.1.

• Update: Tested up to WooCommerce 7.7.0.
• Fix: Use registerCheckoutFilters graduated filter in Blocks plugin.
• Fix: Use WC_MNM_Helpers:get_supported_product_types() to define excluded product types automatically in metabox product selector.
• Fix: Allow input quantity to decrease if the container is overfill for any reason.
• Fix: Update single-product/mnm/mnm-product-quantity.php template to remove errant markup.
• Fix: Legacy meta class fatal error when trying to read Pre-1.10 data.
• Fix: Hide child item's stock remaining when parent is out of stock. #499.
• Dev: Rename wc_mnm_supported_products filter to wc_mnm_supported_product_types

• Fix: Compatibility with Astra theme's quick view feature.
• Dev: Move conditional logic for customizer settings to their respective callback functions for broader compatibility.

• Fix: Vertical alignment of quantity inputs in grid mode (for most themes).
• Fix: Tweak WoodMart theme module to support different column numbers.

• Fix: Previous quantity is not correctly calculated when it's 0. #495.
• Fix: Declare table display for table element.

• New: Add string to prompt users to change configuration when editing container.
• Fix: Switch admin notes check to a daily schedule.

• New: Optional mobile-optimized layout for small screens, see settings in Customizer.
• New: Optional plus/minus buttons, see settings in Customizer.
• New: Display category description when listing child products by category.
• Fix: Reapply discounts/coupons after editing a Mix and Match product in order admin.
• Dev: Move category title text to a template.
• Dev: Move template includes from after_setup_theme to template_redirect hook for better compat with Customzier.
• Dev: Refactor WC_Mix_and_Match_Stock_Manager and WC_MNM_Child_Item classes. Eliminate need to re-instantiate product objects and easier extensibility for validating in other contexts (such as weight). But extreme caution if you were using these classes for any custom purposes.

• Fix - Fixed double subscription discount on container cart prices when using per-item pricing. #434.

• IMPORTANT: PHP 7.2 is required.
• Update: Tested up to WooCommerce 7.3.0.
• New: Separate out "X in stock" remaining text and display in child item details, updated single-product/mnm/mnm-product-quantity.php template.
• Fix: Correctly parse hierarchical child category IDs. Closes #470.
• Fix: Add static className to item data for better blocks compat. Closes #468.
• Fix: Missing export data for layout override and weight calculation.
• Fix: Flatsome compatibility for equal-height product images.
• Fix: Disable per-product overrides when viewing customizer.
• Fix: Default value of customizer settings for show thumbnails/short-description.
• Fix: Fixed a fatal error that was triggered when using PHP v8 and using Cart/Checkout Blocks.
• Fix: Rename tabular layout 'product-name' header cell to 'product-details'.
• Tweak: Audit CSS styles to remove as much explicit padding/margin as possible.
• Tweak: Add a close icon to font family for use by mini-extensions.
• Tweak: Add woocommerce_product_loop_title_classes filter for parity with core.
• Tweak: Adjust front-end styles for mobile first.
• Tweak: Center align quantity inputs in Storefront theme.
• Tweak: container.child_items in script is now an ARRAY. Please check if doing very advanced custom Javascript modifications.
• Dev: Rename WC_MNM_Container.validation_context property to validation_mode.
• Dev: Re-key wc_mnm_child_item_data_attributes to not use 'data-' prefix. It will be auto-added.
• Dev: Introduce wc_mnm_center_align_quantity filter.

• Fix: Double-charging for child items when ordering again. #466.
• Fix: Front-end validation allow overfilled container to be reduced. #461.
• Fix: Child Category IDs are not imported. #467.
• Tweak: Make get_child_item_by_product_id() method public.

• Tweak: Use core cart functions for detecting parent/child relationships in cart item filters.
• Tweak: Add wrapping when doing wc_ajax_mnm_update_container_order_item. For compat with mini-extensions.
• Tweak: Admin edit orders, handle updates with no changes.

• Fix: Fatal error in update cart validation via CoCart
• Tweak: Add check that product still exists in update cart validation.

• New: Child item step validation on the front-end.
• Fix: Quantity input should default to child minimum if one exists.
• Fix: Add aria-live="polite" on status message.
• Fix: Apply Flatsome compatibility classes only in grid layout.
• Tweak: Animate toast-style error notices for individual child items.
• Tweak: Add query_id parameter to wc_get_products() params when querying child items by category.

• Fix: Double-application of taxes in front-end status price display.
• Fix: Replace deprecated jQuery.isFunction()

• Update: Tested up to WooCommerce 6.7.0.
• New: Filter woocommerce_subscriptions_switch_link_text in Subs 4.5.0
• New: Add wc_mnm_editing_container_in_order_configuration filter.
• Fix: Add validation to editing container configuration in order admin.
• Fix: Only apply switch link changes to Mix and Match products.
• Fix: Quantity input display when min=max. #438.
• Fix: Fatal error in admin notices - WC_MNM_Install does not exist when WooCommerce is not active.
• Fix: One Page Checkout compatibility with full-width display. #441.
• Tweak: Make reset link behaves more like "clear".
• Tweak: Remove duplicate value attribute from add to cart button.
• Tweak: Add alt class to reset button.
• Dev: Add support for changing frontend validation messages based on context.

• Fix: Fatal error in cart, undefined function esc_html__x().
• Fix: version_compare() with null as first param is deprecated in php 8.1 #436
• Fix: Metabox link to run upgrade, will actually run upgrade and not scroll to top. #435
• Fix: Do not prompt upgrade routine on new installs.

• New: Introduce subscription switching text string setting for customizing text of subscription switch link for Mix and Match products.
• Fix: Support displaying SVG icons directly in metabox, better support for alternative layouts.
• Fix: Reorder validation so max messages are used when min=0 and max=X.
• Fix: Magic getter passthrough for product methods on child item object.

• Fix: Limit loop classes in OceanWP theme compat to grid layout.

• Important: Slight spacing tweaks in a few strings. Double-check translations.
• New: Introduce Flatsome theme compat module. Closes #350.
• Fix: Min/Max Quantities compat - unset group by quantity as minimum. Closes #316.
• Fix: Don't run foreign key ALTER sql when updating if foreign keys already exist. Removes DB error in log. Closes #426.
• Fix: Update foreign keys to use database prefix.
• Tweak: Add [Frontend] context to customer-facing translatable strings.

• Fix: When discounting from sale price, use regular price to calculate discounted price if product has empty sale price. Restores strikethrough discount html.
• Fix: PHP notice for undefined $price variable in sale price filter.
• Fix: Support grid styles in quickview modal in Storefront theme.
• Tweak: Change strings and buttons to use "edit|reset selections" instead of "configuration"
• Tweak: Astra support for mobile grids.
• Tweak: Use h4 headings for child product titles.
• Tweak: Remove styles from reset button, inherit from theme button styles.
• Tweak: Refine Mix and Match configuration display in cart block.

• Fix - Load order/dependencies for the Cart and Checkout blocks scripts.
• New - Display container config in mini cart.

• Fix: Missing child item configuration in ShipStation.
• Fix: Incorrect cumulative package weight calculation when packed together.

• Fix: Fatal error with All Products for WooCommerce Subscriptions < 3.2.
• Tweak: Apply style rules by class only and not by list elements.
• Tweak: Add compatibility module for WoodMart theme.
• Tweak: Remove wrapping div from add to cart button.
• Tweak: Change success class to woocommerce-message.
• Dev: Add wc_mnm_grid_has_flex_layout filter.

• Fix: Fatal error not enough parameters sent to woocommerce_paypal_payments_product_supports_payment_request_button callback.
• Fix: Update zip build routine to always include the block scripts!

• Update: Tested up to WooCommerce 6.5.0.
• Fix: Import/export of child variations.
• Dev: Add update warning notice for when 2.0 is released.

• Update: Tested up to WooCommerce 6.1.0.
• Note: This release is largely targeted towards improved compatibility with mini-extensions. If you are using any mini-extensions, please look to see if there's an update.
• Dev: Frontend refactor container config to be array of objects. container.api.get_container_config( 'v2' ) to fetch new array[]{ product_id: 99, product_qty: 3 } .
• Dev: Add parameter to wc_mnm_template_add_to_cart() to optionally call add to cart template for a specific product. Improved compatibility with mini-extensions, ie: Grouped MNM.
• Dev: Revamp frontend price/rounding formatting functions to accept custom args.
• Dev: Frontend calculate totals and subtotals from config instead of HTML inputs. This will allow for compat with custom layouts, ie: Select Layouts.
• Dev: Pass false to 'wc-mnm-reset-configuration' triggerHandler to disable update_container(). Also related to compat for custom layouts.

• Fix: Missing action parameter in add to cart form element.
• Fix: Completely remove WooCommerce Payments payment request buttons for Mix and Match products.

• Fix: Load RTL stylesheets when not in SCRIPT_DEBUG mode.
• Fix: Load correct stylesheet when in QuickView Modal.
• Tweak: Moved 'add-to-cart' input value to button.

• Update: Tested up to WooCommerce 5.9.0.
• Fix: Hide PayPal Payments payment request buttons for Mix and Match products.
• Fix: Hide WooCommerce Payments payment request buttons for Mix and Match products.
• Tweak: Display quantity in child product title if min and max allowed quantities are the same.
• Tweak: Wrap main quantity input and add to cart button in div element.

• Update: Tested up to WooCommerce 5.6.0.
• Fix: Add woocommerce_product_has_options core filter to WC_Product_Mix_and_Match class.
• Fix: Only validate container stock if config is still valid. Resolves issue with empty containers getting added to cart via ajax.
• Fix: Quick view support for products with "after summary" forms.
• New: Add wc_mnm_show_edit_it_cart_link filter. Return false to hide "edit" link in cart. Requires Quick View 1.5.0.

• Update: Tested up to WooCommerce 5.4.0.
• New: Enable support for Stripe payment requests in carts that contain a Mix and Match product.
• Fix: Compatibility with PayPal Express Smart buttons. Requires WooCommerce PayPal Express gateway plugin v1.6.21.

• Fix: 1.10.0 database upgrade routine failures when updating 20+ Mix and Match products.

• Update: Tested up to WooCommerce 4.7.0.
• Fix: Support Min/Max Quantities Variation level min/max rules.
• Fix: CoCart integration configuration support for variation IDs in container.
• Fix: Fix compatibility with Validate by Weight mini-extension.

• Update: Tested up to WooCommerce 4.6.0.
• Fix: Restore compatibility with One Page Check single product template.
• Fix: Harden is_child_supported_product_type() helper in case $product is false (ie, product no longer exists,etc)
• Fix: pass container object to wc-mnm-container-quantities-updated trigger in front end script

• New: Add ability to configure the contents of a Mix and Match container in editable/manually-created subscriptions.
• Fix: PHP notice when adding to cart with any child products out of stock.

• Update: Tested up to WooCommerce 4.5.0.
• New: add has_options() method to product class for better compat with blocks.
• Fix: Elementor style rule, force Elementor to display MNM form as a block instead of flex layout.
• Fix: Fix incorrect shipping state on child items in manually created orders.
• Tweak: Add confirm alert to clear selections button.
• Tweak: Change "Clear selection" to "Clear selections".

• Fix: Validate stock against quantity already in the cart.

• IMPORTANT: Includes a Database update so please make a database backup before proceeding.
• New: REST API support for Mix and Match properties in product and order responses.
• New: Compatibility with CoCart plugin. Props @seb86!
• Dev: Change boot method so that class_exists('WC_Mix_and_Match') reliably determines if the plugin is active.
• Dev: Deprecate woocommerce_mnm_order_item_part_of_meta_name filter
• Dev: Change "Container size", "Part of", and "Purchased with" order item meta keys to "mnm_container_size", "mnm_part_of", and "mnm_purchased_with"
• Fix: Repair mnm_data meta data save routine.

• Fix: Update plugin header with tested up to WooCommerce 4.3.0.

• Fix: Delete accidental logging when container is not purchasable.

• Fix: Add parameter to wc_mnm_price_format() to return string without HTML. Resolves html in dropdown for All Products with Subscriptions (with bridge plugin).

• Fix: Make reset button work when editing quantities in cart/after add to cart.
• Tweak: Deprecate maybe_sync() method. Check handled by sync().

• Fix: Exclude build tools from zip file. Reducing zip file size.
• Fix: Force saving the base price if it doesn't exist.

• Fix: Stray comma causing parse error in thumbnail template.

• Update: Tested up to WooCommerce 4.2.0.
• Fix: Add product ID as value attribute to add to cart button. Better compatibility with some ajax add to cart theme scripts.
• Fix: Incorrect display in cart price column for products with per-item pricing.
• New: Add wc_mnm_product_thumbnail_link_classes filter for changing lightbox trigger classes.

• Fix: Incorrect initialization of the photoSwipe scripts!
• Fix: Prevent linking to thumbnails if theme does not support wc-product-gallery-lightbox.
• Fix: Inherit thumbnail of variable product when variation does not have a thumbnail.

• New: Add lightbox on thumbnails if theme supports wc-product-gallery-lightbox.

• Fix: Remove orphaned child products from cart if parent container is removed.

• Fix: Update Product Addons totals when quantity config changes.

• Tweak: Switch mnm-quantity class to itself.

• Update: Tested up to WooCommerce 4.1.0.
• Fix: Child products losing style indent when cart it updated.
• Tweak: Stop center-aligning product details. Inherit styles from theme.

• Fix: Check if cart is set before trying to access cart_contents.
• Fix: Use native functions to get parent container versus searching cart directly.
• Tweak: Add product_id as data attribute to add to cart button, to help some themes that add ajax add to cart.
• Tweak: Auto load certain properties if not defined.
• Tweak: Instead of resetting to minium quantity value, set to original value attribute.
• Tweak: Add broader support for checkbox/dropdown input types.

• New: add wc_mnm_before_sync hook
• New: Prepare for compatibility with PayPal Express Smart buttons when PayPal Express gateway plugin updates.
• Fix: Fix broken woocommerce_product_add_to_cart_text core filter.
• Tweak: Simplify error message HTML markup in mnm-add-to-cart-wrap.php template.
• Tweak: Hide error message on load if JS is enabled.
• Dev: Add configuration to add to cart button as data attribute for potential ajax add to cart usage.

• Update: Tested up to WooCommerce 4.0.0.
• Fix: Script errors when multiple forms are on the same page.
• New: Quantity inputs are empty by default, use WC4 placeholders.
• New: Filter for getting the posted configuration.
• New: Dynamic filter for validating container based on context.
• New: Script supports passing custom configuration when triggering container update.
• New: Filter the child item's configuration data.
• Fix: Check child cart item is set in cart before accessing.

• Update: Tested up to WooCommerce 3.9.0.
• Fix: Add min/max size keys to WPML config.
• Fix: Fatal error when all child contents are out of stock and out of stock products are hidden.
• Fix: Fatal error calculating prices when all child contents are out of stock.
• Fix: Do not show add to cart button when no contents are available.
• Fix: Hide quantity inputs when the parent container is not available.
• New: Introduce woocommerce_mnm_content_loop hook.

• Fix min/max compat. Only restore original values when "ignore min/max" rules is set.

• Fix - Fatal error from incorrectly named Wishlists compatibility module.
• Update: Tested up to WooCommerce 3.7.0.

• New - Add ability to configure the contents of a Mix and Match container in editable/manually-created orders.

• Important - Added support for WooCommerce 3.7+.
• Important - PHP 5.6.20+ is now required.
• Fix: Incorrect error message when 1 quantity is selected.
• Fix: Manually trigger product type change event in metabox on load.
• Tweak - Ignore 'woocommerce_before_cart_item_quantity_zero' action under WC 3.7+.

• Fix: Print Invoice Compatibility - Do not remove bulk "Order #" headlines.
• Tweak: Limit Name Your Price checkbox display control via "per-item pricing" to only Mix and Match products.

• Important: Dropped support for WooCommerce 3.0.
• Important: Added support for WooCommerce 3.6+.
• Tweak: Removed old WooCommerce Helper dependencies.
• New: Stop saving "Part of" meta key. Use add_filter( 'woocommerce_mnm_order_item_legacy_part_of_meta', '__return_true' ); to continue saving.
• Fix: Correct discount calculations when not discounting product from regular price.

• Fix: Incorrect display in WooCommerce Print Invoices & Packing Lists

• New: Script auto-support any quantity type input
• Fix: Script errors for custom quantity config
• Fix: Script error for left/right space currency settings

• NOTICE: Add to cart script heavily refactored. If extending, please test integrations in staging environment before updating.
• New: Support a percentage container discount when in per-item pricing mode.
• New: Ability to edit a container's configruation from the cart.
• New: WooCommerce Print Invoices & Packing Lists compatibility.
• New: Scripts support handling of price suffix with front-end calculation of taxes.
• New: Filter woocommerce_mnm_child_quantity_input_args to change args for only Mix and Matched item quantity selector.
• Fix: Order Again support for WooCommerce 3.5 .
• Fix: Add discount, layout, form location fields to import/export.
• Fix: Handling of Mix and Match content data during import/export.
• Fix: Incorrect price strings in certain instances
• Tweak: Vertical alignment of quantity inputs

• Fix: Fatal error with Product Addons 3.0, insufficient arguments passed to woocommerce_add_cart_item_data
• Fix: Fatal call to undefined method error on product save when updating constant is defined.
• Fix: Hide reset link when item has not been configured

• New: Cache calculated prices at runtime
• New: Add content in WP Privacy Policy Guide
• Fix: Replace deprecated WC()->cart->get_cart_url()
• Fix: Explicitly declare grid style inputs as block elements for theme's that don't
• Fix: Add missing parameters to 'woocommerce_get_price_suffix' filter
• Fix: Mobile cart styles
• Tweak: Change thumbnail size to woocommerce_thumbnail.

• Fix: Replace deprecated WC()->cart->get_cart_url()

• New: Added woocommerce_mnm_tabular_column_headers filter to control table column headers

• Important - WooCommerce 2.X support dropped
• New: New layout option, Grid layout!
• New: New option for changing location of add to cart form.
• New: Add support for WooCommerce product import/export.
• Fix: wc_get_product() should include Mix and Match products
• Fix: Shipstation integration.
• Fix: Add blog ID to background updater to resolbve issues with DB updating in a WP MultiSite environment - see https://github.com/woocommerce/woocommerce/pull/18060
• Fix: Remove from MNM product title

• New: Add support for new WooCommerce updater.
• Fix: PHP 7.1 warnings in cart/checkout.
• Fix: Chrome change event bug.
• Fix: Load plugin textdomain on init hook as recommended by Codex.
• Fix: Re-ordering logic.
• Fix: PHP Warning for illegal offset type in isset or empty in class-wc-product-mix-and-match.php.
• Tweak: Middle-align MNM table cells.

• Fix: Sanitize NaN child quantity inputs.
• Fix: Return product title when multi-ship items aren't MNM

• Fix: Incorrect MnM sale price strings.
• Fix: Missing contents data of MnM containers and missing child product attributes when importing orders in Shipstation (Shipstation Integration v4.1.13 required).

• Fix: Infinite loop when exporting order data to Shipstation/Shipwire under WC 3.0. Triggered when 'WC_Mix_and_Match_Order::get_order_items' is used as a 'woocommerce_order_get_items' filter callback.

• Fix: Parse error on activation.
• Fix: Fatal error calling method on undefined variable in legacy files

• Important: WooCommerce 3.0 support added.
• Important: WooCommerce 2.3 support dropped.
• Dev Feature - New global functions for establishing MnM parent/child cart/order item relationships.
• Feature: Container size may now vary between a minimum/maximum value (feature previously available with the "WooCommerce Mix and Match Min/Max" mini-extension).
• Feature: It is now possible to save MnM containers as virtual or physical at will. Child items can be shipped individually without being coupled to the "Virtual" status of their container.
• Feature: It is now possible to save MnM containers as downloadable.
• Important: Data exported to Shipstation is now physically accurate, based on the shipping configuration of MnM products. Child items are no longer exported as individual items to Shipstation when "Per-Item Shipping" is enabled. Instead, their value (and optionally, weight) is aggregated with the value of their container (assuming it is shipped/non-virtual). Fixes issues with incorrect shipping rate calculations.
• Tweak: MnM child products that are physically packaged in their container now show up as individual list/option items grouped under their parent in Shipstation packing slips.

• Fix: "Fatal error: Function name must be a string in /includes/class-wc-mnm-cart.php on line 879"

• Fix: Container quantity validation when ordering multiple quantities of same container
• Tweak: Add minimum attribute to admin quantity input

• Dev: Filter the product types that are allowed in a container
• Dev: Javascript trigger for price updates

• Fix: calculate min/max price/regular_price meta for per-item priced products based on raw, unfiltered prices
• Tweak: rename Non-Bundled Shipping to Per-Item Shipping

• Fix: Shipstation import issues due to PHP warnings in XML file.

• Fix: NaN if casting to int when qty input doesn't exist
• Fix: unified handling of non-purchasable children (display with temporarily unavailable message)
• Tweak: prevent total quantity from ever being higher than container limit

• Tweak: extra JS validation for sold-individually items to prevent inputs from accepting quantities higher than 1

• Fix: incorrect error message for containers

• Tweak: leave class "quantity" in place on quantiy input wrapper for better compatibility with themes

• Fix: quantity validation with no JS
• Tweak: better compatibility with Product Addons for per-item pricing MNM products

• Fix: Parent containers are sold individually, if contain a product that is sold individually
• Dev Feature: add meta fields via hook for better extending via satellite plugins
• Dev Feature: add filter for container size in order item meta

• Feature: Ability to define a base price.
• Fix - Validate quantities on update cart if container includes any items sold individually.
• Fix - Limit quantity input max to container size.
• Fix - MnM product prices incl/excl tax according to the 'Display Prices in the Shop' option state.

• Feature: - Unlimited Size Containers. Set the container quantity to 0 to allow customers to purchase as many items as they want.
• Fix: Cart fatal error when a MnM product in the cart is changed to another product type.
• Fix: Shipstation integration.
• Dev: Add filters for container and child item validation.

• Fix: Quantity formatting in order-details templates.
• Fix: Ignore is_purchasable() for child items in container with static pricing.
• Tweak: better animation of WooCommerce messages.
• Tweak: better formatting of attribute labels.

• Fix: get_price_suffix() strict standards error with WC 2.4.
• Tweak: add woocommerce-info class to mnm_message div that communicates quantity and totals required.
• Tweak: add cart_group class to form.cart for better Product Addons support.

• Fix: Correct template version numbers.
• Fix: Revised indentation of bundled items in cart/orders, etc.
• Fix: Improved compatibility with weight/value-based shipping methods.
• Fix: ShipStation compatibility.
• Dev Feature: When "Non-Bundled Shipping" is unchecked, allow mixed products' weights to be added to the container weight by using the 'woocommerce_mnm_item_has_bundled_weight' filter.
• Fix: Price Filter widget range now takes into account MnM prices correctly.

• Fix: PHP 5.2 compatibility.

• Initial Release.