Update index.ts

Author: lxsmnsyc

src/index.ts

@@ -260,7 +260,7 @@ export default function solidPlugin(options: Partial<Options> = {}): Plugin {
     },
 
     configResolved(config) {
-      needHmr = config.command === 'serve' && config.mode !== 'production' && (options.hot !== false && !options.refresh.disabled);
+      needHmr = config.command === 'serve' && config.mode !== 'production' && (options.hot !== false && !options.refresh?.disabled);
     },
 
     resolveId(id) {