谈谈我在vue-cli3中用预渲染遇到的坑

# vue.config.js
new PrerenderSPAPlugin({...
routes: ['/', '/pg1', '/pg2', '/pg3', '/pg4'],
...
# router/index.js
import Index from '../views/Index.vue'
import Pg1 from '../views/Pg1.vue'

const routes = [{
  path: '/',
  name: 'Index',
  component: Index, // 不要用懒加载
 },
 {
  path: '/pg1',
  name: 'Pg1',
  component: Pg1 // 不要用懒加载
 },
 {
  path: '/pg2',
  name: 'Pg2',
  component: () => import('../views/Pg2.vue'), // 可以用懒加载
 },

# vue.config.js
const path = require('path');
const PrerenderSPAPlugin = require('prerender-spa-plugin');
const Renderer = PrerenderSPAPlugin.PuppeteerRenderer;
  configureWebpack: () => {
  if (process.env.NODE_ENV === 'production') {
   console.log(process.env.NODE_ENV)
   return {
    plugins: [
     new PrerenderSPAPlugin({
      //要求-给的WebPack-输出应用程序的路径预渲染。
      staticDir: path.join(__dirname, './dist/fontend'),
      //必需，要渲染的路线。 
      routes: ['/', '/Pg1', '/Pg2', '/Pg3', '/Pg4'],
      //必须，要使用的实际渲染器，没有则不能预编译 
     
      renderer: new Renderer({
       inject: {
        foo: 'bar'
       },
       headless: false, //渲染时显示浏览器窗口。对调试很有用。 
       //等待渲染，直到检测到指定元素。
       //例如，在项目入口使用`document.dispatchEvent(new Event('custom-render-trigger'))` 
       renderAfterDocumentEvent: "render-event",
       renderAfterTime: 5000
      })
     })
    ]
   }
  } else {
   return;
  }

# main.js
new Vue({

 router,
 render: h => h(App),
 mounted() {
  document.dispatchEvent(new Event('render-event')) # 新增此句
 }
}).$mount('#app')

# router/index.js
import Index from '../views/Index.vue'
import Pg1 from '../views/Pg1.vue'
const routes = [{
  path: '/',
  name: 'Index',
  component: Index, // 不要用懒加载
 },
 {
  path: '/Pg1',
  name: 'Pg1',
  component: Pg1 // 不要用懒加载
 },
 {
  path: '/Pg2',
  name: 'Pg2',
  component: () => import('../views/Pg2.vue'), // 可以用懒加载
 },
 {
  path: '/Pg3',
  name: 'Pg3',
  component: () => import('../views/Pg3.vue'), // 可以用懒加载
 },
 {
  path: '/Pg4',
  name: 'Pg4',
  component: () => import('../views/Pg4.vue'), // 可以用懒加载
}]