Fixes #9080

Changes proposed in this Pull Request

Disables the ECE element on the following scenarios:

• Pages: Product, Cart and Checkout pages. Except Pay for order.
• Conditions:
  • If the product (or cart according to the page) doesn't require shipping
  • and tax amount is calculated based on the shopper's billing address.

This is to avoid charging the shopper a different amount than what was presented on the payment sheet. More on that here.

Testing instructions

Test product, cart and checkout pages

• Go to WooCommerce > Settings > General.
  • Then Enable taxes and save changes.
• Go to WooCommerce > Settings > Tax.
  • Set "Calculate tax based on": "Customer billing address" and save changes.
• Make sure ECE is enabled.
  • You can enable with following command: wp option update _wcpay_feature_stripe_ece 1
• Create a simple virtual product.
• Visit the product page you just created.
• ✅ Notice there's no ECE button rendered.
• Add the product to the cart then go to the cart page.
• ✅ Notice there's no ECE button rendered.
• Go to the checkout page.
• ✅ Notice there's no ECE button rendered.
• Set "Calculate tax based on": "Customer shipping address" and save changes.
• Visit the product page you created on previous steps.
• ✅ Notice the ECE button is rendered.
• Add the product to the cart and go to the cart page.
• ✅ Notice the ECE button is rendered.
• Go to the checkout page
• ✅ Notice the ECE button is rendered.

Test Pay for order page is unaffected

• Go to WooCommerce > Settings > General.
  • Then Enable taxes and save changes.
• Go to WooCommerce > Settings > Tax.
  • Set "Calculate tax based on": "Customer billing address" and save changes.
• Go to WooCommerce > Orders
  • Click "Add order" to create a new order.
  • Click "Add items" the "Add product(s)" to add the virtual product create steps above.
  • Click "Create"
  • Copy the link "Customer payment page →" and open it in another browser instance.
  • ✅ Notice the ECE button is rendered.
• Pay using ECE.
• ✅ Order should be processed and amount should be correct.

• Run npm run changelog to add a changelog file, choose patch to leave it empty if the change is not significant. You can add multiple changelog files in one PR by running this command a few times.
• Covered with tests (or have a good reason not to test in description ☝️)
• Tested on mobile (or does not apply)

Post merge

• Link to testing instructions from release testing doc following these instructions : Add link here / 'QA Testing Not Applicable'
• Add or update critical flows and testing instructions for critical flows, if applicable.
• Add what's changed (description, screenshot, demo videos etc.) to the release announcement post, if applicable.