Question

我正在尝试使用服务器端呈现（SSR）和Typescript来构建堆栈。一切似乎都很好，但我得到了错误：TypeError: Cannot read property 'render' of undefined。这是完整的堆栈跟踪：

TypeError: Cannot read property 'render' of undefined
    at normalizeRender (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/vue-server-renderer/build.js:6621:19)
    at render (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/vue-server-renderer/build.js:6840:5)
    at Object.renderToString (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/vue-server-renderer/build.js:6871:9)
    at /Users/shoun/Documents/repositories/vuejs-ssr-typescript/dist/server.js:16:14
    at Layer.handle [as handle_request] (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/layer.js:95:5)
    at /Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/index.js:281:22
    at param (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/index.js:354:14)
TypeError: Cannot read property 'render' of undefined
    at normalizeRender (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/vue-server-renderer/build.js:6621:19)
    at render (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/vue-server-renderer/build.js:6840:5)
    at Object.renderToString (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/vue-server-renderer/build.js:6871:9)
    at /Users/shoun/Documents/repositories/vuejs-ssr-typescript/dist/server.js:16:14
    at Layer.handle [as handle_request] (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/layer.js:95:5)
    at /Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/index.js:281:22
    at param (/Users/shoun/Documents/repositories/vuejs-ssr-typescript/node_modules/express/lib/router/index.js:354:14)

这是我的服务器配置：

import * as express from 'express';
import * as path from 'path';
import * as VueRender from 'vue-server-renderer';
import * as fs from 'fs-extra';
import app from './assets/app';
declare var __dirname;

// Get the HTML layout
const layout = fs.readFileSync(path.join(__dirname, 'index.html'), 'utf8');

// Create a renderer
const renderer = VueRender.createRenderer();

let server = express();

server.get('/hello', function (req, res) {
    res.send('Hello World!');
});

server.use('/assets', express.static(path.join(__dirname, 'assets')));

// Handle all GET requests
server.get('*', function (request, response) {
    // Render our Vue app to a string
    renderer.renderToString(
        // Create an app instance
        app(),
        // Handle the rendered result
        function (error, html) {
            // If an error occurred while rendering...
            if (error) {
                // Log the error in the console
                console.error(error);
                // Tell the client something went wrong
                return response
                    .status(500)
                    .send('Server Error')
            }
            // Send the layout with the rendered app's HTML
            response.send(layout.replace('<div id="app"></div>', html))
        }
    )
});

let port = 4500;
server.listen(port, () => {
    console.log(`App listening on ${port}`);
});

您可以在我的github存储库中找到源代码：https://github.com/sichida/vuejs-ssr-typescript。我真的可以使用一些帮助，因为我被卡住了......

非常感谢！

Answer 1

我检查了您的回购，问题实际上在文件src/assets/app.ts中，在createApp函数中，您返回ComponentOptions类型的对象，但是renderToString采用Vue类型的对象。

它实际上可能比你现在的简单得多：

import * as Vue from 'vue';

let createApp = function () {
  return new Vue({
    props: ['message'],
    template: '<span>{{ message }}</span>',
  });
};
export default createApp;

就是这样，你只需要返回一个新的Vue实例。

Answer 2

我发现为了让Vue呈现某些东西，它需要一个：

render property
template property
$mount() ed

现在，如果您喜欢我，并且您的HTML中有类似的内容：

<div id="app">
    <navbar></navbar>
    ...
</div>

用于挂载app.$mount('#app')，您需要做的是：

将<div id="app">完全将其内容移至某个组件（可能称之为App.vue？）
将render属性添加到Vue实例，例如render: h => h(App)，其中App是您刚创建的组件
直接将该组件用于SSR，即从entry-server.js或其他
$mount entry-client.js中的nvm install 9.3.0 --reinstall-packages-from=9.2.0实例用于补水

VueJs：服务器端渲染和Typescript出错

2 个答案: