WebsiteDesignOutsource.com research

Component Inventories for Site Migrations

Why cataloging templates and components reduces migration surprises.

Component Inventories for Site Migrations editorial illustration

An inventory gives a redesign team a shared map of templates, modules, states, and dependencies. It also exposes where a screenshot-based handoff is hiding behavior.

What to record

List component name, purpose, source locations, content fields, variants, responsive states, accessibility rules, analytics dependencies, owner, and destination. Mark unknowns rather than silently guessing.

Methodology

This process note synthesizes component, accessibility, and migration documentation. It is intended for planning and review, not as a claim about project savings.

Key Stats

  • WCAG 2.2 is organized around four principles (W3C)
  • The HTML specification defines native interactive elements and states (WHATWG)
  • Key Takeaways

  • Inventory behavior as well as visual appearance.
  • Record ownership and unresolved questions.
  • Reconcile the inventory with post-build QA.
  • Sources

    1. WCAG 2.2 Accessibility criteria.

    2. HTML standard Native web behavior.

    3. ARIA APG Interaction patterns.

    4. USWDS Component example.

    5. GOV.UK Design System Component example.

    6. Storybook Component documentation.

    7. Google site moves Migration guidance.

    8. Schema.org Structured data.

    9. Nielsen design systems System overview.

    10. MDN web components Component concepts.

    Further reading

    Design-system handoff controls

    Content migration quality controls

    Related Research

    Related reading

    Related reading

    Related reading

    Frequently asked questions

    Is a component inventory only for large sites?

    No. Even a small site benefits from knowing which repeated patterns must remain consistent.

    What happens to unknowns?

    Give each one an owner and resolution date; do not turn an assumption into an undocumented requirement.

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