refactor: use spread (#3498)

Author: anshumanv

examples/api/simple/server.js

@@ -5,9 +5,7 @@ const WebpackDevServer = require('../../../lib/Server');
 const webpackConfig = require('./webpack.config');
 
 const compiler = Webpack(webpackConfig);
-const devServerOptions = Object.assign({}, webpackConfig.devServer, {
-  open: true,
-});
+const devServerOptions = { ...webpackConfig.devServer, open: true };
 const server = new WebpackDevServer(devServerOptions, compiler);
 
 server.listen(8080, '127.0.0.1', () => {

examples/util.js

@@ -23,7 +23,7 @@ module.exports = {
       }
     }
 
-    const result = Object.assign(defaults, config);
+    const result = { ...defaults, ...config };
     const onBeforeSetupMiddleware = ({ app }) => {
       app.get('/.assets/*', (req, res) => {
         const filename = path.join(__dirname, '/', req.path);
@@ -87,7 +87,7 @@ module.exports = {
     };
 
     if (result.output) {
-      Object.assign(result.output, output);
+      result.output = { ...result.output, ...output };
     } else {
       result.output = output;
     }

lib/utils/normalizeOptions.js

@@ -262,7 +262,7 @@ function normalizeOptions(compiler, options, logger, cacheDir) {
               target: options.proxy[context],
             };
           } else {
-            proxyOptions = Object.assign({}, options.proxy[context]);
+            proxyOptions = { ...options.proxy[context] };
             proxyOptions.context = correctedContext;
           }
 

test/e2e/hot-and-live-reload.test.js

@@ -202,14 +202,11 @@ describe('hot and live reload', () => {
       );
 
       const compiler = webpack(reloadConfig);
-      const devServerOptions = Object.assign(
-        {},
-        {
-          host: '0.0.0.0',
-          port,
-        },
-        mode.options
-      );
+      const devServerOptions = {
+        host: '0.0.0.0',
+        port,
+        ...mode.options,
+      };
       const server = new Server(devServerOptions, compiler);
 
       await new Promise((resolve, reject) => {

test/e2e/logging.test.js

@@ -189,14 +189,11 @@ describe('logging', () => {
         webSocketServer.webSocketServer || 'default'
       })`, async () => {
         const compiler = webpack({ ...config, ...testCase.webpackOptions });
-        const devServerOptions = Object.assign(
-          {},
-          {
-            host: '0.0.0.0',
-            port,
-          },
-          testCase.devServerOptions
-        );
+        const devServerOptions = {
+          host: '0.0.0.0',
+          port,
+          ...testCase.devServerOptions,
+        };
         const server = new Server(devServerOptions, compiler);
 
         await new Promise((resolve, reject) => {