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

// Cross-origin isolation headers so SharedArrayBuffer (WASM threads, used by
// the threaded BLIS method) is available during local dev/preview. In
// production on GitHub Pages these can't be set as headers, so the app also
// ships public/coi-serviceworker.js (registered from index.html).
const coopCoep = {
  'Cross-Origin-Opener-Policy': 'same-origin',
  'Cross-Origin-Embedder-Policy': 'require-corp',
}

// https://vite.dev/config/
export default defineConfig({
  plugins: [react()],
  base: './',
  server: { headers: coopCoep },
  preview: { headers: coopCoep },
})