LegacyOptions Type — vite Architecture

Source Code

packages/vite/src/node/config.ts lines 590–614

export interface LegacyOptions {
  /**
   * In Vite 6.0.8 and below, WebSocket server was able to connect from any web pages. However,
   * that could be exploited by a malicious web page.
   *
   * In Vite 6.0.9+, the WebSocket server now requires a token to connect from a web page.
   * But this may break some plugins and frameworks that connects to the WebSocket server
   * on their own. Enabling this option will make Vite skip the token check.
   *
   * **We do not recommend enabling this option unless you are sure that you are fine with
   * that security weakness.**
   */
  skipWebSocketTokenCheck?: boolean
  /**
   * Opt-in to the pre-Vite 8 CJS interop behavior, which was inconsistent.
   *
   * In pre-Vite 8 versions, Vite had inconsistent CJS interop behavior. This was due to
   * the different behavior of esbuild and the Rollup commonjs plugin.
   * Vite 8+ uses Rolldown for both the dependency optimization in dev and the production build,
   * which aligns the behavior to esbuild.
   *
   * See the Vite 8 migration guide for more details.
   */
  inconsistentCjsInterop?: boolean
}