docs: textfield-based component analysis docs #5741

rise-erpelding · 2025-09-18T15:45:49Z

Description

Creates AI-generated migration documentation to analyze component differences to guide SWC migration to S2, with human vetting. The documentation serves as a bridge between the migrated Spectrum 2 CSS work and the corresponding web components, in order to help engineers understand what needs to be implemented, updated, or aligned between the two systems to guide the development of 2nd generation web components.

This batch is for the barebones components: Textfield/Textarea, Number field, Search, and Color field (which does not exist in CSS or S2 design spec)

Motivation and context

Clear development roadmap: Provides comprehensive feature gap analysis for building 2nd generation web components
Implementation requirements: Identifies all features and capabilities that need to be implemented to match Spectrum 2 CSS and design specs
Breaking change transparency: Establishes implementation requirements and design changes that may lead to breaking changes and/or API changes for the next major version
Adoption planning: Enables developers and consuming teams to plan for 2nd gen web component adoption and understand migration effort required

Related issue(s)

SWC-1208

Screenshots (if appropriate)

Author's checklist

I have read the CONTRIBUTING and PULL_REQUESTS documents.
I have reviewed at the Accessibility Practices for this feature, see: Aria Practices
~~I have added automated tests to cover my changes.~~
~~I have included a well-written changeset if my change needs to be published.~~
I have included updated documentation if my change required it.

Reviewer's checklist

Includes a Github Issue with appropriate flag or Jira ticket number without a link
Includes thoughtfully written changeset if changes suggested include patch, minor, or major features
Automated tests cover all use cases and follow best practices for writing
Validated on all supported browsers
All VRTs are approved before the author can update Golden Hash

Manual review test cases

Documentation Quality

All files follow template structure with proper collapsible sections
CSS => SWC mapping tables use correct status values
Summary sections are concise and actionable
No broken markdown syntax

Cross-Reference Accuracy

CSS selectors match actual metadata.json files
SWC attributes match actual TypeScript source files
DOM structure comparisons match template files
Implementation gaps are complete and accurate

Device review

Did it pass in Desktop?
Did it pass in (emulated) Mobile?
Did it pass in (emulated) iPad?

changeset-bot · 2025-09-18T15:45:53Z

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Latest commit: 80b94b8

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github-actions · 2025-09-18T15:50:25Z

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When a visual regression test fails (or has previously failed while working on this branch), its results can be found in the following URLs:

Deployed to Azure Blob Storage: pr-5741

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github-actions · 2025-09-18T15:53:30Z

Tachometer results

Currently, no packages are changed by this PR...

rise-erpelding · 2025-09-23T14:52:11Z

migration-roadmap/README.md

Adding this to hopefully provide some context!

rise-erpelding · 2025-09-23T19:23:46Z

migration-roadmap/README.md

+
+### The bigger picture
+
+When an SWC developer picks up Spectrum 2 implementation work, this documentation provides:


Hmmm, maybe:

Suggested change

When an SWC developer picks up Spectrum 2 implementation work, this documentation provides:

When Spectrum web engineer picks up next-gen implementation work, this documentation provides:

rise-erpelding · 2025-09-23T19:25:43Z

migration-roadmap/README.md

+
+### Why we do this analysis
+
+The migration roadmap addresses a critical need in the Spectrum 2 development process:


Should we use "next-gen" rather than "Spectrum 2" anytime we're talking about SWC development? Maybe even in a couple of places above this?

Suggested change

The migration roadmap addresses a critical need in the Spectrum 2 development process:

The migration roadmap addresses a critical need in the next-gen development process:

rise-erpelding · 2025-09-23T19:26:38Z

migration-roadmap/README.md

+
+The migration roadmap addresses a critical need in the Spectrum 2 development process:
+
+- **Development roadmap**: Provides clear guidance for building 2nd generation web components


next-gen? 2nd gen?

rise-erpelding · 2025-09-23T19:31:56Z

migration-roadmap/README.md

+The analysis surfaces:
+
+- **Missing from WC**: CSS features without web component equivalents
+- **Missing from CSS**: Web component features without CSS support


Probably not super relevant, I've been removing these as I see them, so might remove this here as well.

rise-erpelding · 2025-09-23T19:57:55Z

migration-roadmap/README.md

+### For SWC developers
+
+1. **Start here**: Review the component's migration roadmap document
+2. **Check specifications**: Understand all CSS selectors and SWC features
+3. **Review DOM changes**: Identify structural changes needed in render methods
+4. **Analyze mapping table**: Find features that need implementation or removal
+5. **Read summary**: Get focused overview of required changes


Hmmm, do we want this?

rise-erpelding · 2025-09-23T19:59:46Z

migration-roadmap/README.md

+## Current components
+
+The following components have migration documentation:
+
+- Alert Banner (`alert-banner.md`)
+- [Add other completed components here]


Probably will take this out because maintaining it wouldn't be very fun.

rise-erpelding requested a review from a team as a code owner September 18, 2025 15:45

rise-erpelding added Documentation ready-for-review labels Sep 18, 2025

rise-erpelding added 4 commits September 18, 2025 10:47

docs(textfield): add component analysis docs

9e4d527

docs(search): add component analysis docs

8c24f6f

docs(numberfield): add component analysis docs

6cc9b51

docs(colorfield): add component analysis docs

2c217ea

rise-erpelding force-pushed the rise-erpelding/swc-1208-component-analysis-docs branch from 830facd to 2c217ea Compare September 18, 2025 15:48

rise-erpelding self-assigned this Sep 18, 2025

docs: add README for migration roadmap

80b94b8

rise-erpelding commented Sep 23, 2025

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migration-roadmap/README.md

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Adding this to hopefully provide some context!

rise-erpelding commented Sep 23, 2025

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marissahuysentruyt self-requested a review September 23, 2025 21:20

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docs: textfield-based component analysis docs #5741

docs: textfield-based component analysis docs #5741

rise-erpelding commented Sep 18, 2025 •

edited by marissahuysentruyt

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		### The bigger picture

		When an SWC developer picks up Spectrum 2 implementation work, this documentation provides:

	When an SWC developer picks up Spectrum 2 implementation work, this documentation provides:
	When Spectrum web engineer picks up next-gen implementation work, this documentation provides:


		### Why we do this analysis

		The migration roadmap addresses a critical need in the Spectrum 2 development process:


		The migration roadmap addresses a critical need in the Spectrum 2 development process:

		- Development roadmap: Provides clear guidance for building 2nd generation web components

docs: textfield-based component analysis docs #5741

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Description

Motivation and context

Related issue(s)

Screenshots (if appropriate)

Author's checklist

Reviewer's checklist

Manual review test cases

Documentation Quality

Cross-Reference Accuracy

Device review

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rise-erpelding commented Sep 18, 2025 •

edited by marissahuysentruyt

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