feat: 网站favicon工具添加下载功能， debgu

src/utils/url.ts

@@ -11,4 +11,10 @@ export function isUrl(str: string): boolean {
     '^(https?:\\/\\/)?'+ // protocol  
     '((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,})','i'); // fragment locator  
   return urlPattern.test(str);  
-}  
+}
+
+const UrlUtils = {
+  isUrl
+}
+
+export default UrlUtils