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Component Lab / ecommerce / cart-and-checkout-inventory-substitution-flow

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Inventory Substitution Flow · Cart and checkout

Offers meaningful replacements when selected stock disappears for cart review, delivery, payment, and confirmation; it is designed to keep itemized cost and retained choices visible through commitment. Alternatives compare compatibility, price, delivery, and explicit consent. The cart and checkout variant is specialized for payment and connectivity failure must not destroy the order state. Users can keep itemized cost and retained choices visible through commitment while understanding the current state, available choices, and resulting consequence.

Lab tested Responsive Dark mode Interactive
Version
1.0.0
Updated
2026-08-08
Dependencies
Zero
Preparing the interactive workbench…

Implementation field notes

Use inventory substitution flow · cart and checkout confidently.

The preview and source are only the starting point. Use these notes to decide where the component fits, preserve its accessibility contract, and verify the adapted result.

Good fit for

  • Cart and checkout
  • Cart and checkout
  • Users can keep itemized cost and retained choices visible through commitment while understanding the current state, available choices, and resulting consequence.

This cart and checkout pattern works best when its purpose is clear in the surrounding page hierarchy.

Accessibility contract

  • The primary purpose and current state remain available as text and do not depend on color, motion, pointer position, or visual geometry.
  • Every interaction has keyboard equivalence, visible focus, predictable Escape behavior where applicable, and appropriately scoped status announcements.
  • Reduced-motion, 200% zoom, long-content, narrow-container, and forced-color behavior are part of the implementation acceptance criteria.

Integration plan

  1. Copy the standalone HTML and scoped CSS into an isolated page.
  2. Adapt primary accent, secondary accent, canvas surface, primary text through the Inspector.
  3. Connect the defensive JavaScript, then test every control with a keyboard.
  4. Review the result at 375, 768, 1024, and 1440 pixels before shipping.

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