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fix(ui): scope tailwind preflight to [data-dg-agent] via plugin #27

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Merged
lukeocodes merged 1 commit into from
May 6, 2026
+31 −5
Merged

fix(ui): scope tailwind preflight to [data-dg-agent] via plugin #27

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5 changes: 4 additions & 1 deletion bun.lock
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3 changes: 2 additions & 1 deletion packages/ui/package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,8 @@
"class-variance-authority": "0.7.1",
"clsx": "2.1.1",
"lucide-react": "1.11.0",
"tailwind-merge": "3.5.0"
"tailwind-merge": "3.5.0",
"tailwindcss-scoped-preflight": "^4.0.6"
},
"peerDependencies": {
"react": ">=18.0.0",
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28 changes: 25 additions & 3 deletions packages/ui/src/styles.css
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Original file line number Diff line number Diff line change
@@ -1,5 +1,26 @@
@import "tailwindcss";
/* Tailwind v4 imports, granular so we can scope preflight.
*
* The full `@import "tailwindcss";` shortcut pulls preflight in at the global
* scope, which uses universal selectors (`*, ::before, ::after`, `html`, `body`)
* that bleed onto any host page that loads the bundle. The
* `tailwindcss-scoped-preflight` plugin rewrites every preflight rule with a
* `[data-dg-agent]` ancestor, so the reset only applies to widget descendants.
*
* Theme tokens and utilities stay global so embedders building their own
* widget layouts with @deepgram/ui components continue to get class-based
* styling via Tailwind utilities.
*
* Do NOT add `@import "tailwindcss";` back. Granular imports + the plugin are
* the contract that keeps the host page untouched.
*/
@layer theme, base, components, utilities;
@import "tailwindcss/theme.css" layer(theme);
@import "tailwindcss/utilities.css" layer(utilities);
@plugin "@tailwindcss/typography";
@plugin "tailwindcss-scoped-preflight" {
isolation-strategy: inside;
selector: [data-dg-agent];
}

/* Explicitly tell Tailwind v4 to scan component source files for class usage.
Without this, auto-detection may miss files in sibling repos / outside the project root. */
Expand Down Expand Up @@ -97,8 +118,9 @@
color-scheme: light;
}

/* Extended tokens without direct shadcn equivalents */
:root {
/* Extended tokens without direct shadcn equivalents.
* Scoped to [data-dg-agent] (not :root) so they do not leak to the host. */
[data-dg-agent] {
--primary-hover: color-mix(in srgb, var(--color-primary) 85%, #000);
--primary-active: color-mix(in srgb, var(--color-primary) 70%, #000);
--accent-active: #f3f4f6;
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