需求： 一个前端项目页面下载速度很慢，该项目的ip的带宽只有2M,cpu1核，这种情况下，只能通过缩小react打包的体积，以便用2M带宽下载容量更小的数据量来提高加载速度。
优化前：
优化后：
一：webpack4 插件减小包的体积
uglifyjs-webpack-plugin：减少空格可以减少无用字符占用的文件体积，缩小文件体积
compression-webpack-plugin: 将文件压缩为 zip 包,需要nginx配置 nginx_http_gzip_static_module
extract-text-webpack-plugin:把css抽离出来，可进一步减小文件体积
最终，wenpack.config.js配置
const { resolve } = require('path');
const HtmlwebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const CleanPlugin = require('clean-webpack-plugin');
const autoprefixer = require('autoprefixer');
const WebpackMd5Hash = require('webpack-md5-hash');
const path = require('path');
const fs = require('fs');
const ip = require('ip').address();
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const CompressionPlugin = require("compression-webpack-plugin");
const getBundleName = function () {
let dirUrl = path.resolve(__dirname, 'bundle');
let files = fs.readdirSync(dirUrl);
for (fileName of files) {
if (/.js$/.test(fileName)) {
return fileName;
}
}
return '';
};
const bundleName = getBundleName();
const bundlePath = '/js/';
module.exports = {
context: resolve(__dirname, 'app'),
entry: {
index: ['./index.js'],
// 我们 app 的入口文件
},
output: {
filename: 'js/[name].[chunkhash:5].js',
chunkFilename: '[name].[chunkhash:5].js',
// 输出的打包文件
path: resolve(__dirname, 'build'),
publicPath: '/',
// 对于热替换(HMR)是必须的，让 webpack 知道在哪里载入热更新的模块(chunk)
},
resolve: {
// 用于查找模块的目录
extensions: ['.js', '.json', '.jsx', '.css'],
// 使用的扩展名
alias: {
Util: path.resolve(__dirname, './app/utils/'),
Urls: path.resolve(__dirname, './config/'),
},
},
devtool: 'source-map',
module: {
rules: [
{
test: /\.jsx?$/,
use: ['babel-loader'],
exclude: /node_modules/,
}, {
test: /\.(scss|sass|css)$/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: [
'css-loader',
{
loader: 'postcss-loader',
options: {
plugins: function () {
return [
autoprefixer({
browsers: ['> 0%'],
}),
];
},
},
},
'sass-loader?outputStyle=expanded',
],
}),
}, {
test: /\.(eot|woff|woff2|ttf|svg|png|jpg|gif)$/,
use: [
{
loader: 'url-loader',
options: {
limit: 100,
name: 'imgs/[name].[hash:5].[ext]',
},
},
],
},
],
},
plugins: [
new webpack.HashedModuleIdsPlugin(),
new UglifyJsPlugin({
uglifyOptions: {
ie8: false,
mangle: true,
output: { comments: false },
compress: {
warnings: false,
drop_console: true,
drop_debugger: true,
unused: false,
},
},
sourceMap: true,
cache: true,
}),
new WebpackMd5Hash(),
new webpack.DefinePlugin({
'process.env.NODE_ENV': JSON.stringify('production'),
'LOCATIONIP': JSON.stringify(ip),
}),
new webpack.optimize.CommonsChunkPlugin({
name: ['vendor', 'manifest'],
minChunks: 2,
}),
new HtmlwebpackPlugin({
template: './index.html',
filename: 'task.html', // 生成的html存放路径,相对于path
inject: true,
path: '/',
bundleUrl: bundlePath + bundleName,
chunks: ['index', 'vendor', 'manifest'],
}),
new webpack.DllReferencePlugin({
context: '.',
manifest: require('./bundle/bundle.manifest.json'),
}),
new ExtractTextPlugin('css/[name].[contenthash:5].css'),
new CompressionPlugin(),
new CleanPlugin(['build']),
],
};
二，nginx配置 nginx_http_gzip_static_module
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
# 开启gzip
gzip on;
# 启用gzip压缩的最小文件，小于设置值的文件将不会压缩
gzip_min_length 1k;
# gzip 压缩级别，1-9，数字越大压缩的越好，也越占用CPU时间，后面会有详细说明
gzip_comp_level 4;
# 进行压缩的文件类型。javascript有多种形式。其中的值可以在 mime.types 文件中找到。
gzip_types text/plain application/javascript application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif image/png application/vnd.ms-fontobject font/ttf font/opentype font/x-woff image/svg+xml;
# 是否在http header中添加Vary: Accept-Encoding，建议开启
gzip_vary on;
# 禁用IE 6 gzip
gzip_disable "MSIE [1-6]\.";
# 设置压缩所需要的缓冲区大小
gzip_buffers 32 4k;
# 设置gzip压缩针对的HTTP协议版本
gzip_http_version 1.0;
server {
listen 80;
listen 443 ssl;
ssl on;
ssl_certificate ###;
ssl_certificate_key ###;
ssl_session_timeout 5m;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
server_name www.########;
root /data/program/build/;
index task.html;
location ^~ /download {
autoindex on;
autoindex_exact_size on;
autoindex_localtime on;
alias /tmp/upload_tmp;
}
#只要匹配到文件上传路径就直接不在进行其他匹配
location ^~ /upload/ {
upload_pass /res_upload;
upload_store /tmp/upload_tmp;
upload_store_access user:rw;
upload_limit_rate 0;
upload_set_form_field "${upload_field_name}_name" $upload_file_name;
upload_set_form_field "content_type" $upload_content_type;
upload_set_form_field "tmp_path" $upload_tmp_path;
upload_aggregate_form_field "md5" $upload_file_md5;
upload_aggregate_form_field "size" $upload_file_size;
upload_pass_form_field "^.*$";
}
location / {
try_files $uri @fallback;
}
location @fallback {
rewrite .* /task.html break;
}
error_page 404 /404.html;
location = /40x.html {
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
}
}
