refactor: ECE utility for button UI interactions

[frosso]

Fixes #

Changes proposed in this Pull Request

In the "Tokenized Paymenr Request" implementation, we had a "Button UI" class, which allows to interact with the jQuery elements around the button and slimmed a bit the wcPayEce class from some methods: https://github.com/Automattic/woocommerce-payments/blob/0df81cc8f4ddf157dcb2a12c72a410e80ed2b9c3/client/tokenized-payment-request/button-ui.js

I'd like to bring it to the ECE implementation, so it can also be reflected in the Tokenized ECE implementation.

I didn't isolate these changes to the Tokenized ECE implementation for a couple of reasons:

• They seem on the safe side
• I'd like to keep the differences between the main ECE and the tokenized ECE at a minimum

I'll also copy the same changes to the tokenized ECE ( https://github.com/Automattic/woocommerce-payments/tree/develop/client/tokenized-express-checkout ), once this is merged.

Since this is just moving the methods in an isolated class, the same test coverage should be present as before.

Testing instructions

The changes don't affect block-based elements (like block-based cart/checkout). These changes affect product page, shortcode cart & checkout, pay-for-order.

• Ensure you have the "Enable Cart-Token implementation for ECE" feature flag disabled in the Dev Tools
• As a merchant, ensure you have GooglePay/ApplePay enabled in the WooPayments settings (for product pages, cart, checkout)
• As a customer, go to a product page for a simple product
• You should see the GooglePay button in Chrome
• Interact with the product quantities, the button should update
• You can click on the button and you should be able to interact with it
• Close the dialog, add the product to the cart
• Go to the shortcode cart page, you should be able to see the interact with the GooglePay button
• Go to the shortcode checkout page, you should be able to see the interact with the GooglePay button

---

• [x] 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.

[botwoo]

Test the build

Option 1. Jetpack Beta

• Install and activate Jetpack Beta.
• Use this build by searching for PR number 9744 or branch name refactor/express-checkout-button-ui-utility in your-test.site/wp-admin/admin.php?page=jetpack-beta&plugin=woocommerce-payments

Option 2. Jurassic Ninja - available for logged-in A12s

:rocket: Launch a JN site with this branch :rocket:

:information_source: Install this Tampermonkey script to get more options.

---

Build info:

• Latest commit: 3d046ddb298fd09cdfe2edc00b2afbbd32a7d838
• Build time: 2024-11-19 08:12:25 UTC

Note: the build is updated when a new commit is pushed to this PR.

[github-actions[bot]]

Size Change: +42 B (0%)

Total Size: 1.33 MB

Filename	Size	Change
release/woocommerce-payments/dist/express-checkout.js	14.9 kB	+42 B (0%)

ℹ️ View Unchanged

| Filename | Size | | :--- | :---: | | `release/woocommerce-payments/assets/css/admin.css` | 1.37 kB | | `release/woocommerce-payments/assets/css/admin.rtl.css` | 1.37 kB | | `release/woocommerce-payments/assets/css/success.css` | 182 B | | `release/woocommerce-payments/assets/css/success.rtl.css` | 184 B | | `release/woocommerce-payments/dist/blocks-checkout-rtl.css` | 2.66 kB | | `release/woocommerce-payments/dist/blocks-checkout.css` | 2.66 kB | | `release/woocommerce-payments/dist/blocks-checkout.js` | 52.7 kB | | `release/woocommerce-payments/dist/cart-block.js` | 16.8 kB | | `release/woocommerce-payments/dist/cart.js` | 5.73 kB | | `release/woocommerce-payments/dist/checkout-rtl.css` | 1.23 kB | | `release/woocommerce-payments/dist/checkout.css` | 1.23 kB | | `release/woocommerce-payments/dist/checkout.js` | 33 kB | | `release/woocommerce-payments/dist/express-checkout-rtl.css` | 229 B | | `release/woocommerce-payments/dist/express-checkout.css` | 229 B | | `release/woocommerce-payments/dist/frontend-tracks.js` | 854 B | | `release/woocommerce-payments/dist/index-rtl.css` | 52.6 kB | | `release/woocommerce-payments/dist/index.css` | 52.5 kB | | `release/woocommerce-payments/dist/index.js` | 302 kB | | `release/woocommerce-payments/dist/multi-currency-analytics.js` | 1.08 kB | | `release/woocommerce-payments/dist/multi-currency-rtl.css` | 4.46 kB | | `release/woocommerce-payments/dist/multi-currency-switcher-block.js` | 60.6 kB | | `release/woocommerce-payments/dist/multi-currency.css` | 4.46 kB | | `release/woocommerce-payments/dist/multi-currency.js` | 57.3 kB | | `release/woocommerce-payments/dist/order-rtl.css` | 730 B | | `release/woocommerce-payments/dist/order.css` | 730 B | | `release/woocommerce-payments/dist/order.js` | 42 kB | | `release/woocommerce-payments/dist/payment-gateways-rtl.css` | 1.32 kB | | `release/woocommerce-payments/dist/payment-gateways.css` | 1.32 kB | | `release/woocommerce-payments/dist/payment-gateways.js` | 38.4 kB | | `release/woocommerce-payments/dist/plugins-page-rtl.css` | 386 B | | `release/woocommerce-payments/dist/plugins-page.css` | 386 B | | `release/woocommerce-payments/dist/plugins-page.js` | 20.1 kB | | `release/woocommerce-payments/dist/product-details-rtl.css` | 433 B | | `release/woocommerce-payments/dist/product-details.css` | 436 B | | `release/woocommerce-payments/dist/product-details.js` | 12.1 kB | | `release/woocommerce-payments/dist/settings-rtl.css` | 11.6 kB | | `release/woocommerce-payments/dist/settings.css` | 11.5 kB | | `release/woocommerce-payments/dist/settings.js` | 224 kB | | `release/woocommerce-payments/dist/subscription-edit-page.js` | 703 B | | `release/woocommerce-payments/dist/subscription-product-onboarding-modal-rtl.css` | 524 B | | `release/woocommerce-payments/dist/subscription-product-onboarding-modal.css` | 524 B | | `release/woocommerce-payments/dist/subscription-product-onboarding-modal.js` | 20.2 kB | | `release/woocommerce-payments/dist/subscription-product-onboarding-toast.js` | 730 B | | `release/woocommerce-payments/dist/subscriptions-empty-state-rtl.css` | 120 B | | `release/woocommerce-payments/dist/subscriptions-empty-state.css` | 120 B | | `release/woocommerce-payments/dist/subscriptions-empty-state.js` | 19.3 kB | | `release/woocommerce-payments/dist/tokenized-express-checkout-rtl.css` | 229 B | | `release/woocommerce-payments/dist/tokenized-express-checkout.css` | 229 B | | `release/woocommerce-payments/dist/tokenized-express-checkout.js` | 14.8 kB | | `release/woocommerce-payments/dist/tos-rtl.css` | 235 B | | `release/woocommerce-payments/dist/tos.css` | 235 B | | `release/woocommerce-payments/dist/tos.js` | 21.8 kB | | `release/woocommerce-payments/dist/woopay-direct-checkout.js` | 6.13 kB | | `release/woocommerce-payments/dist/woopay-express-button.js` | 24.5 kB | | `release/woocommerce-payments/dist/woopay-rtl.css` | 4.52 kB | | `release/woocommerce-payments/dist/woopay.css` | 4.49 kB | | `release/woocommerce-payments/dist/woopay.js` | 71.6 kB | | `release/woocommerce-payments/includes/subscriptions/assets/css/plugin-page.css` | 625 B | | `release/woocommerce-payments/includes/subscriptions/assets/js/plugin-page.js` | 814 B | | `release/woocommerce-payments/vendor/automattic/jetpack-assets/build/i18n-loader.js` | 2.46 kB | | `release/woocommerce-payments/vendor/automattic/jetpack-assets/build/jetpack-script-data.js` | 767 B | | `release/woocommerce-payments/vendor/automattic/jetpack-assets/build/react-jsx-runtime.js` | 553 B | | `release/woocommerce-payments/vendor/automattic/jetpack-assets/src/js/i18n-loader.js` | 1.02 kB | | `release/woocommerce-payments/vendor/automattic/jetpack-assets/src/js/script-data.js` | 69 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/babel.config.js` | 163 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/identity-crisis.css` | 2.45 kB | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/identity-crisis.js` | 14.2 kB | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/identity-crisis.rtl.css` | 2.45 kB | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-admin-create-user.css` | 198 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-admin-create-user.js` | 280 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-admin-create-user.rtl.css` | 198 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-login.css` | 625 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-login.js` | 333 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-login.rtl.css` | 626 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-users.js` | 417 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/tracks-ajax.js` | 521 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/tracks-callables.js` | 584 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-admin-create-user.css` | 215 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-admin-create-user.js` | 521 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-login.css` | 721 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-login.js` | 412 B | | `release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-users.js` | 621 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/about.css` | 1.04 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/admin-empty-state.css` | 294 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/admin-order-statuses.css` | 408 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/admin.css` | 3.59 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/checkout.css` | 301 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/modal.css` | 746 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/view-subscription.css` | 574 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/wcs-upgrade.css` | 414 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/admin-pointers.js` | 543 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/admin.js` | 9.4 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/jstz.js` | 6.78 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/jstz.min.js` | 3.84 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/meta-boxes-coupon.js` | 545 B | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/meta-boxes-subscription.js` | 2.52 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/moment.js` | 22.2 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/moment.min.js` | 11.7 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/payment-method-restrictions.js` | 1.29 kB | | `release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/wcs-meta-boxes-order.js` | 507 B | | 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