Upgrade to Next.js 16 + React 19 + Tailwind CSS 4#2
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- next ^14 → ^16, react/react-dom ^18 → ^19, tailwindcss ^3 → ^4 - @types/react and @types/react-dom → ^19 - Remove autoprefixer and postcss (built into Tailwind 4) - Delete tailwind.config.ts and postcss.config.js - Migrate globals.css: replace @tailwind directives with @import "tailwindcss" - Add @theme block with PE design system colors and fonts - Convert @layer utilities/components to @Utility and plain classes Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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- Import tokens.css in globals.css and reference var(--pe-color-*) in @theme and :root - Replace inline style hex colors with `colors` import from design-system in TSX files - Replace Tailwind arbitrary hex classes (bg-[#hex], text-[#hex]) with theme classes - Add @policyengine/design-system as dependency Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Closing as stale (2 months without updates and likely conflicts with main). The framework upgrade goal here — Next 14 → 16, React 18 → 19, Tailwind 3 → 4 — is still valid and overlaps with the broader Next-modernization sweep happening across the org (see policyengine-ui-kit#28 → 0.8.0+0.9.0 and the consumer rollout). I'll re-open a fresh PR on top of current main when this repo's turn comes up. If you want it sooner, ping me. |
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Summary
autoprefixerandpostcssdevDependencies (built into TW4)tailwind.config.tsandpostcss.config.jsglobals.cssto TW4 format:@import "tailwindcss"+@theme {}block with PE design tokens@layer utilitiesto@utilitydirectives per TW4 specTest plan
bun run buildpasses with zero errors