Radial Glow Background · Blue

// Local module wrapper. The following JSX fragment is byte-identical to the included original.
// Preserve the adjacent MIT LICENSE when reusing it.
export default function Demo() {
  return (
<div className="min-h-screen w-full bg-[#0f172a] relative">
  {/* Blue Radial Glow Background */}
  <div
    className="absolute inset-0 z-0"
    style={{
      backgroundImage: `radial-gradient(circle 600px at 50% 50%, rgba(59,130,246,0.3), transparent)`,
    }}
  />
     {/* Your Content/Components */}
</div>
  );
}

/** Local sandbox host. Ready is a mount observation, never a verification result. */
import React, { Component, useEffect } from 'react';
import { createRoot } from 'react-dom/client';

declare global {
  interface Window {
    __STYLEGALLERY_PREVIEW__: { id: string; status: string; errors: string[] };
  }
}

export function mount(Demo: React.ComponentType, id: string) {
  const state = window.__STYLEGALLERY_PREVIEW__ = { id, status: 'loading', errors: [] as string[] };
  const send = (message: object) => parent.postMessage({ ...message, id }, '*');
  const report = (error: unknown) => {
    const message = error instanceof Error ? error.message : String(error);
    if (!state.errors.includes(message)) state.errors.push(message);
    state.status = 'error';
    document.body.dataset.previewStatus = 'error';
    send({ type: 'sg-preview-error', message });
  };
  window.addEventListener('error', (event) => report(event.error ?? event.message));
  window.addEventListener('unhandledrejection', (event) => report(event.reason));
  window.addEventListener('securitypolicyviolation', (event) => report(`Blocked by preview policy: ${event.violatedDirective}`));
  const theme = new URLSearchParams(location.search).get('theme') === 'dark' ? 'dark' : 'light';
  document.documentElement.classList.toggle('dark', theme === 'dark');
  document.documentElement.dataset.theme = theme;
  const observe = () => {
    const root = document.getElementById('root')!;
    const elements = Array.from(root.querySelectorAll('*'));
    const rect = root.getBoundingClientRect();
    const diagnostics = {
      textLength: (root.textContent ?? '').trim().length,
      elementCount: elements.length,
      visibleElementCount: elements.filter((element) => {
        const bounds = element.getBoundingClientRect();
        const style = getComputedStyle(element);
        return bounds.width > 0 && bounds.height > 0 && style.display !== 'none' && style.visibility !== 'hidden' && Number(style.opacity) !== 0;
      }).length,
      images: [],
      canvases: [],
      rootRect: { width: rect.width, height: rect.height },
      documentWidth: document.documentElement.scrollWidth,
      viewportWidth: innerWidth,
    };
    send({ type: 'sg-preview-observation', diagnostics });
  };
  class Boundary extends Component<{ children: React.ReactNode }, { error: string | null }> {
    state = { error: null as string | null };
    static getDerivedStateFromError(error: Error) { return { error: error.message }; }
    componentDidCatch(error: Error) { report(error); }
    render() { return this.state.error ? <p role="alert">This preview could not render: {this.state.error}</p> : this.props.children; }
  }
  function Ready() {
    useEffect(() => {
      const preference = matchMedia('(prefers-reduced-motion: reduce)');
      const syncSVG = () => document.querySelectorAll('svg').forEach((svg) => {
        if (preference.matches) svg.pauseAnimations?.();
        else svg.unpauseAnimations?.();
      });
      syncSVG();
      preference.addEventListener('change', syncSVG);
      let second = 0;
      let delayed = 0;
      const first = requestAnimationFrame(() => { second = requestAnimationFrame(() => {
        if (state.status !== 'error') {
          state.status = 'mounted';
          document.body.dataset.previewStatus = 'mounted';
          send({ type: 'sg-preview-ready' });
          observe();
          delayed = window.setTimeout(observe, 700);
        }
      }); });
      return () => {
        cancelAnimationFrame(first);
        cancelAnimationFrame(second);
        clearTimeout(delayed);
        preference.removeEventListener('change', syncSVG);
      };
    }, []);
    return <Demo />;
  }
  createRoot(document.getElementById('root')!).render(<Boundary><Ready /></Boundary>);
}

@import "tailwindcss";
@custom-variant dark (&:where(.dark, .dark *));

@theme inline {
  --color-foreground: var(--foreground);
}

:root {
  --foreground: #172033;
  background: #f8fafc;
  color: var(--foreground);
  color-scheme: light;
  font-family: Arial, sans-serif;
}

:root.dark {
  --foreground: #e2e8f0;
  background: #0f172a;
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
}

#root {
  min-height: 100vh;
}

#root[data-kind="spinner"] {
  align-items: center;
  box-sizing: border-box;
  display: flex;
  justify-content: center;
  padding: 24px;
}

.spinner-sampler {
  display: grid;
  gap: 36px 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 600px;
  width: 100%;
}

.spinner-sample {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: center;
  min-width: 0;
}

.spinner-label {
  font-family: ui-monospace, monospace;
  font-size: 11px;
  overflow-wrap: anywhere;
  text-align: center;
}

noscript {
  display: block;
  padding: 24px;
}

@media (min-width: 480px) {
  .spinner-sampler {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-play-state: paused !important;
  }
}

react 19.1.1 — LICENSE

MIT License

Copyright (c) Meta Platforms, Inc. and affiliates.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


========================================================================

react-dom 19.1.1 — LICENSE

MIT License

Copyright (c) Meta Platforms, Inc. and affiliates.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


========================================================================

scheduler 0.26.0 — LICENSE

MIT License

Copyright (c) Meta Platforms, Inc. and affiliates.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

{
  "id": "21st-cd00cba61362",
  "sourceRevision": "1550af7903f50b4f19a1b44786f27ca01f3ef6ab",
  "license": "MIT",
  "files": [
    {
      "file": "blue-radial-glow.jsx",
      "sha256": "6e41caf5fff73ee1d5d7cb3506db5704ff336b8fdba698a96793c5a002ee77e7",
      "kind": "jsx-fragment",
      "sourcePath": "src/data/patterns.ts"
    },
    {
      "file": "LICENSE",
      "sha256": "939281af86bbfb04989214783a8c502ea263c5b7e4439fbcac6b02d0792120ca",
      "kind": "license",
      "sourcePath": "LICENSE"
    }
  ],
  "adaptations": [
    "The original JSX fragment is wrapped in a React function without changing its JSX, classes, or inline styles."
  ],
  "runtimeDependencies": {
    "react": "19.1.1",
    "react-dom": "19.1.1",
    "scheduler": "0.26.0"
  },
  "runtime_verified": false
}

# Radial Glow Background · Blue

Original implementation revision: `1550af7903f50b4f19a1b44786f27ca01f3ef6ab`. Preserve the included MIT LICENSE. Original modules are byte-identical to their acquired sources. Usage.tsx and runtime/* are local integration support.

- The original JSX fragment is wrapped in a React function without changing its JSX, classes, or inline styles.

The standalone HTML includes all runtime JavaScript, CSS, and dependency notices. Open it directly to view the example; add ?theme=dark or ?theme=light to select the host theme. The two radial backgrounds keep their original fixed colors in either host theme. No external requests, storage, cookies, navigation, or provider app is needed.

To integrate source, use React 19, Tailwind CSS 4, and the included Usage.tsx. Kibo Spinner also needs lucide-react, clsx, and tailwind-merge; resolve @repo/shadcn-ui/ to packages/shadcn-ui/ and @/lib/utils to packages/shadcn-ui/lib/utils.ts. The supplied runtime styles define foreground tokens and the demo layout. Runtime dependency versions are recorded in provenance.json and their notices in THIRD-PARTY-LICENSES.txt.

The ready bridge signals a React mount, not verified behavior. Compilation and source integrity have been checked; browser behavior and accessibility remain unverified here.