From c436074578e989a4abeb3505877cb619afefcd61 Mon Sep 17 00:00:00 2001
From: FairyEver <1711467488@qq.com>
Date: Thu, 12 Dec 2019 20:20:02 +0800
Subject: [PATCH] performance optimization

Former-commit-id: 2b6ff62544b71078714b4f0a1f465941829910ea
Former-commit-id: 5dc98ee77f03ce3a617ad6efdbee45568db0d941
Former-commit-id: 279188c012ccccd7545f1c7ef9ad583ebc94f877
Former-commit-id: 983a49cae179740f17e70de6edef8509ec441ca3 [formerly fba357218d2f2e29d45b0fd398d57369d258757f]
Former-commit-id: 604878fbd93447f6e7a229cdf6b3524144d43ce8
Former-commit-id: ea4788ebb0f14bb63a6b8aaa48b6918efd89a9d0
Former-commit-id: 8a6dc6b6daccdb9a2699a68e927f80d06d21aff5
Former-commit-id: 6e2317d25d5b1794cb8404c181b6a38ee598892a
Former-commit-id: ac9cd70286571f2026120ace77ce36a0e0667f9a
---
 .eslintrc.js  |  4 ++--
 vue.config.js | 49 +++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/.eslintrc.js b/.eslintrc.js
index 98d04316..343a7d43 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -8,8 +8,8 @@ module.exports = {
     '@vue/standard'
   ],
   rules: {
-    'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
-    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off'
+    'no-console': 'off',
+    'no-debugger': 'off'
   },
   parserOptions: {
     parser: 'babel-eslint'
diff --git a/vue.config.js b/vue.config.js
index c2ffaaf6..8b00ac09 100644
--- a/vue.config.js
+++ b/vue.config.js
@@ -37,12 +37,55 @@ module.exports = {
     }
   },
   configureWebpack: {
+    // 关闭文件过大提示，利于打包加快速度
+    performance: {
+      hints: 'warning',
+      // 入口起点的最大体积
+      maxEntrypointSize: 50000000,
+      // 生成文件的最大体积
+      maxAssetSize: 30000000,
+      // 只给出 js 文件的性能提示
+      assetFilter: function(assetFilename) {
+        return assetFilename.endsWith('.js');
+      }
+    },
+    // 公共代码抽离和代码分割
     optimization: {
       runtimeChunk: 'single',
+      splitChunks: {
+        cacheGroups: {
+          vendors: {
+            test: /[\\/]node_modules[\\/]/,
+            name: 'vendors',
+            minSize: 30000,
+            minChunks: 1,
+            chunks: 'initial',
+            priority: 1 // 设置处理的优先级，数值越大越优先处理
+          },
+          commons: {
+            test: /[\\/]src[\\/]common[\\/]/,
+            name: 'commons',
+            minSize: 30000,
+            minChunks: 3,
+            chunks: 'initial',
+            priority: -1,
+            reuseExistingChunk: true // 允许使用已经存在的代码块
+          },
+          styles: {
+            name: 'styles',
+            test: /\.(sa|sc|c)ss$/,
+            chunks: 'all',
+            enforce: true
+          },
+          runtimeChunk: {
+            name: 'manifest'
+          }
+        }
+      },
       minimizer: [
         // 自定义js优化配置，将会覆盖默认配置
         new UglifyJsPlugin({
-          exclude: /\.min\.js$/, // 过滤掉以".min.js"结尾的文件，我们认为这个后缀本身就是已经压缩好的代码，没必要进行二次压缩
+          exclude: /\.min\.js$/, // 过滤掉以 '.min.js' 结尾的文件，我们认为这个后缀本身就是已经压缩好的代码，没必要进行二次压缩
           cache: true,
           parallel: true, // 开启并行压缩，充分利用cpu
           sourceMap: false,
@@ -50,7 +93,9 @@ module.exports = {
           uglifyOptions: {
             compress: {
               unused: true,
-              drop_debugger: true
+              drop_console: true,
+              drop_debugger: true,
+              pure_funcs: ['console.log']
             },
             output: {
               comments: false