polyfill codes

src/libs/browser.js

@@ -1,3 +1,5 @@
+import { CLIENT_EXTS, CLIENT_USERSCRIPT, CLIENT_WEB } from "../config";
+
 /**
  * 浏览器兼容插件，另可用于判断是插件模式还是网页模式，方便开发
  * @returns
@@ -12,3 +14,6 @@ function _browser() {
 
 export const browser = _browser();
 export const client = process.env.REACT_APP_CLIENT;
+export const isExt = CLIENT_EXTS.includes(client);
+export const isGm = client === CLIENT_USERSCRIPT;
+export const isWeb = client === CLIENT_WEB;