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src/libs/client.js

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+import { CLIENT_EXTS, CLIENT_USERSCRIPT, CLIENT_WEB } from "../config";
+
+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;