chore: fix precompiled variables

close #235

scripts/webpack.base.conf.js

@@ -9,7 +9,10 @@ const { IS_DEV, styleRule } = require('./utils');
 const MINIFY = true;
 const DIST = 'dist';
 const definePlugin = new webpack.DefinePlugin({
-  'process.env.DEBUG': IS_DEV ? 'true' : 'false', // whether to log message errors
+  'process.env': {
+    NODE_ENV: JSON.stringify(process.env.NODE_ENV),
+    DEBUG: IS_DEV ? 'true' : 'false', // whether to log message errors
+  },
 });
 
 function resolve(dir) {