Vite fetches all the source files in production!

[vladmw5]

Context:
I have created a new react ts vite project, and I have noticed that when going to the Dev Tools Network tab and choosing All, all my .ts and .tsx source files are being fetched. This also happens in production, which is of course an undesirable behaviour

Is this a bug or something that I can fix in the config? How to prevent source files from being fetched in production?

Here is my current vite config:

export default defineConfig(async ({ mode }) => {
  const env = loadEnv(mode, process.cwd());

  const port = Number(env.VITE_DEV_SERVER_PORT) || 3333;

  return {
    plugins: [react(), checker({ typescript: true }), viteTsconfigPaths()],
    server: {
      port,
    },
    resolve: {
      alias: {
        '@': resolveApp('src'),
      },
    },
  };
});

here is my tsconfig.json:

{
  "compilerOptions": {
    "types": ["node"],
    "baseUrl": "./",
    "paths": {
      "@/*": ["src/*"]
    },
    "target": "ESNext",
    "useDefineForClassFields": true,
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "module": "ESNext",
    "skipLibCheck": true,
    "moduleResolution": "Bundler",
    "allowImportingTsExtensions": true,
    "allowSyntheticDefaultImports": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx",
    "strict": true,
    "noFallthroughCasesInSwitch": true,
    "strictNullChecks": true,
    "noImplicitAny": true,
    "noPropertyAccessFromIndexSignature": true,
    "forceConsistentCasingInFileNames": true,
    "useUnknownInCatchVariables": true
  },
  "include": ["src", "**.d.ts"],
  "references": [{ "path": "./tsconfig.node.json" }]
}

here is my tsconfig.node.json:

{
  "compilerOptions": {
    "composite": true,
    "skipLibCheck": true,
    "module": "ESNext",
    "moduleResolution": "bundler",
    "allowSyntheticDefaultImports": true,
    "strict": true
  },
  "include": ["vite.config.ts", "src/vite-env.d.ts"]
}

Node version: 20.11.11
package manager: yarn v1

this is how I build for production:
tsc && vite build

How to prevent source files from being fetched in production?