解决vue首屏加载慢，白屏的问题实例教学

解决vue首屏加载慢，白屏的问题

// 需要es6支持
const helloworld = () => import('@/components/helloworld.vue')
export default new router({
  routes: [
        { path: '/', name: 'helloworld', component: helloworld },
  ]
})

或

const helloworld = resolve => require(['@/components/helloworld.vue'], resolve)
export default new router({
  routes: [
        { path: '/', name: 'helloworld', component: helloworld },
  ]
})

2.开启gzip压缩

// 以vue-cli脚手架为例  找到config下index.js文件

build: {
    // template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),

    // paths
    assetsroot: path.resolve(__dirname, '../dist'),
    assetssubdirectory: 'static',
    assetspublicpath: '/',

    /**
     * source maps
     */

    productionsourcemap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // gzip off by default as many popular static hosts such as
    // surge or netlify already gzip all static assets for you.
    // before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    // 设置生产环境gzip为true
    productiongzip: true,   
    productiongzipextensions: ['js', 'css'],

    // run the build command with an extra argument to
    // view the bundle analyzer report after build finishes:
    // `npm run build --report`
    // set to `true` or `false` to always turn it on or off
    bundleanalyzerreport: process.env.npm_config_report
  }

3.使用webpack的externals属性把不需要打包的库文件分离出去，减少打包后文件的大小

// index.html中引入对应的文件或使用cdn

<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>


// 在webpack基础配置中添加以下代码

module.exports = {
  //...
  externals: {
    jquery: 'jquery'
  }
};

4.使用vue的服务端渲染(ssr)

ssr优点是优化，以及加快首屏加载

关于ssr可以参考文档nuxt.js