diff --git a/env.d.ts b/env.d.ts
index 11abdf6..242da4e 100644
--- a/env.d.ts
+++ b/env.d.ts
@@ -1,21 +1,31 @@
-/**
- * fix code hint
- */
-type UnionType<T> = T | (string & {});
+export {}; // Make this a module
 
-declare namespace NodeJS {
-  interface ProcessEnv {
-    /**
-     * Node.js environment
-     */
-    NODE_ENV: UnionType<'development' | 'production'>;
-    /**
-     * development mode. The url of the vite dev server.
-     */
-    VITE_DEV_SERVER_URL?: string;
-    /**
-     * production mode. All js files in the dist directory, excluding index.js. It's to be a json string.
-     */
-    VITE_DIST_FILES?: string;
+declare global {
+  /**
+   * fix code hint
+   */
+  type UnionType<T> = T | (string & {});
+
+  namespace NodeJS {
+    interface ProcessEnv {
+      /**
+       * Node.js environment
+       */
+      NODE_ENV: UnionType<'development' | 'production'>;
+      /**
+       * `[vite serve]` The url of the vite dev server.
+       */
+      VITE_DEV_SERVER_URL?: string;
+      /**
+       * `[vite build]` All js files in the dist directory, excluding index.js. It's to be a json string.
+       */
+      VITE_DIST_FILES?: string;
+    }
   }
+
+  /**
+   *  `[vite serve]` Get the html of the development webview.
+   * @param options serverUrl: The url of the vite dev server.
+   */
+  function __getWebviewHtml__(options?: string | { serverUrl: string }): string;
 }