add IS_WEB global for electron build

webpack.electron.config.js

@@ -3,6 +3,7 @@ const webpack = require('webpack');
 const merge = require('webpack-merge');
 const baseConfig = require('./webpack.base.config.js');
 const CopyWebpackPlugin = require('copy-webpack-plugin');
+const { DefinePlugin } = require('webpack');
 
 const STATIC_ROOT = path.resolve(__dirname, 'static/');
 const DIST_ROOT = path.resolve(__dirname, 'dist/');
@@ -94,6 +95,11 @@ const renderConfig = {
       },
     ],
   },
+  plugins: [
+    new DefinePlugin({
+      IS_WEB: JSON.stringify(false),
+    }),
+  ],
 };
 
 module.exports = [merge(baseConfig, mainConfig), merge(baseConfig, renderConfig)];