zhongwei/gh-djankies-claude-configs-tailwind-4

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Zhongwei Li 735ed8d1d7 Initial commit

2025-11-29 18:22:33 +08:00

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Step-by-Step Migration Checklist

Pre-Migration

Create new git branch: git checkout -b upgrade-tailwind-v4
Commit all current changes
Document current Tailwind version
Backup tailwind.config.js
Review custom plugins in use
Check browser support requirements
Note any CSS preprocessor usage

Phase 1: Dependencies

Update Package Dependencies

Update Tailwind CSS to v4

npm install tailwindcss@next

Install appropriate build tool plugin

For Vite:

npm install @tailwindcss/vite

For PostCSS:

npm install @tailwindcss/postcss

For CLI:

npm install @tailwindcss/cli

Remove deprecated dependencies

npm uninstall autoprefixer postcss-import @tailwindcss/container-queries

Update package.json

{
  "dependencies": {
    "tailwindcss": "^4.0.0"
  },
  "devDependencies": {
    "@tailwindcss/vite": "^4.0.0"
  }
}

Phase 2: Build Configuration

Vite Configuration

Update vite.config.js

import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import tailwindcss from '@tailwindcss/vite';

export default defineConfig({
  plugins: [react(), tailwindcss()],
});

Remove PostCSS config if using Vite plugin
Test build: npm run build

PostCSS Configuration

Update postcss.config.js

export default {
  plugins: {
    '@tailwindcss/postcss': {},
  },
};

Remove autoprefixer and postcss-import
Test build: npm run build

Next.js Configuration

Ensure postcss.config.js exists

export default {
  plugins: {
    '@tailwindcss/postcss': {},
  },
};

Test: npm run dev

Phase 3: CSS Configuration

Migrate tailwind.config.js to @theme

Open tailwind.config.js
Open main CSS file (e.g., src/index.css)
Replace @tailwind directives

Old:

@tailwind base;
@tailwind components;
@tailwind utilities;

New:

@import 'tailwindcss';

Convert theme.extend to @theme

Example conversion:

tailwind.config.js:

module.exports = {
  theme: {
    extend: {
      colors: {
        brand: '#3b82f6',
        accent: '#a855f7',
      },
      fontFamily: {
        sans: ['Inter', 'sans-serif'],
      },
      spacing: {
        18: '4.5rem',
      },
    },
  },
};

CSS:

@import 'tailwindcss';

@theme {
  --font-sans: 'Inter', sans-serif;
  --color-brand: oklch(0.65 0.25 270);
  --color-accent: oklch(0.65 0.25 320);
  --spacing-18: 4.5rem;
}

Convert hex colors to oklch() using https://oklch.com/
Test: colors render correctly

Content Detection

Remove content array (automatic detection)
Add @source directives if needed

@source "../packages/ui";
@source not "./legacy";

Verify all template files are detected
Check .gitignore excludes node_modules

Custom CSS

Migrate @layer components to CSS

@layer components {
  .btn {
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-blue-600);
    border-radius: var(--radius-md);
  }
}

Convert @layer utilities to @utility

Old:

@layer utilities {
  .content-auto {
    content-visibility: auto;
  }
}

New:

@utility content-auto {
  content-visibility: auto;
}

Phase 4: Utility Class Updates

Opacity Modifiers

Search for opacity utilities

grep -r "bg-opacity-" src/
grep -r "text-opacity-" src/
grep -r "border-opacity-" src/
grep -r "ring-opacity-" src/

Replace with slash syntax

Find and replace:

bg-{color} bg-opacity-{value} → bg-{color}/{value}
text-{color} text-opacity-{value} → text-{color}/{value}
border-{color} border-opacity-{value} → border-{color}/{value}

Example:

<div class="bg-black bg-opacity-50"></div>
→
<div class="bg-black/50"></div>

Test: opacity values render correctly

Flex Utilities

Search for flex utilities

grep -r "flex-shrink" src/
grep -r "flex-grow" src/

Replace with new names

Find and replace:

flex-shrink-0 → shrink-0
flex-shrink → shrink
flex-grow-0 → grow-0
flex-grow → grow

Shadow Utilities

Search for shadow-sm

grep -r "shadow-sm" src/

Replace with shadow-xs

shadow-sm → shadow-xs

Ring Utilities

Search for bare ring class

grep -r 'class="[^"]*ring[^-"]' src/

Add explicit width if expecting 3px default

<input class="ring" />
→
<input class="ring-3" />

Border Utilities

Search for bare border class

grep -r 'class="[^"]*border[^-"]' src/

Add explicit color if expecting gray

<div class="border"></div>
→
<div class="border border-gray-200"></div>

Phase 5: Arbitrary Values

Space Handling

Search for arbitrary values with commas

grep -r "grid-cols-\[.*,.*\]" src/

Replace commas with underscores

<div class="grid-cols-[1fr,500px,2fr]"></div>
→
<div class="grid-cols-[1fr_500px_2fr]"></div>

Phase 6: Testing

Build Tests

Run development build: npm run dev
Check console for errors
Verify styles load
Run production build: npm run build
Check build output
Test production bundle

Visual Testing

Test home page
Test all major pages
Check responsive breakpoints
Verify dark mode (if used)
Test hover states
Test focus states
Check form inputs
Verify buttons
Check modals/overlays
Test animations

Component Testing

Test each component in isolation
Verify colors match
Check spacing
Test typography
Verify shadows and borders
Check opacity values

Browser Testing

Safari 16.4+
Chrome 111+
Firefox 128+
Mobile Safari
Mobile Chrome

Phase 7: Cleanup

Remove Old Files

Delete tailwind.config.js
Remove old PostCSS config (if using Vite plugin)
Clean node_modules

rm -rf node_modules package-lock.json
npm install

Update Documentation

Update README.md
Document new setup process
Update contribution guide
Note new browser requirements

Code Review

Review all changed files
Check for missed migrations
Verify no broken styles
Run linter: npm run lint
Run tests: npm test

Phase 8: Deploy

Pre-Deploy Checks

All tests passing
No console errors
Production build successful
Visual regression tests pass
Performance metrics acceptable

Deploy

Merge PR to main
Deploy to staging
Test staging environment
Deploy to production
Monitor for issues

Post-Deploy

Verify production site
Check analytics for errors
Monitor performance
Gather feedback

Common Issues Checklist

Styles not applying → Check @import syntax
Build errors → Verify PostCSS/Vite config
Colors different → Convert hex to oklch
Borders wrong color → Add explicit border color
Placeholders wrong → Check preflight changes
Buttons wrong cursor → Add cursor-pointer
Missing utilities → Check for typos
Dark mode broken → Verify class strategy

Rollback Plan

If migration fails:

Revert git branch: git checkout main
Delete branch: git branch -D upgrade-tailwind-v4
Reinstall dependencies: npm install
Document issues encountered
Plan remediation

Success Criteria

All pages render correctly
No console errors
Production build successful
All tests passing
Performance maintained or improved
No visual regressions
Browser support verified
Documentation updated

Estimated Timeline

Pre-migration: 1 hour
Dependencies & build config: 1-2 hours
CSS migration: 2-4 hours
Utility updates: 4-8 hours
Testing: 4-8 hours
Cleanup & documentation: 1-2 hours
Deploy: 1-2 hours

Total: 14-27 hours depending on project size

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