SyntaxError：尝试使用@ babel / register时出现意外的令牌
当尝试使用Babel运行节点并做出反应时，@ babel / register不起作用
我查看了SO上的类似问题，重新安装了节点10.15.1，升级到最新版本11.9。
以下是package.json中的相关依赖项：
"dependencies": {
"@babel/core": "7.1.6",
"@babel/polyfill": "^7.2.5",
"@babel/register": "^7.0.0",
"@svgr/webpack": "2.4.1",
"babel-core": "7.0.0-bridge.0",
"babel-jest": "23.6.0",
"babel-loader": "8.0.4",
"babel-plugin-named-asset-import": "0.3.0",
"babel-preset-react-app": "7.0.0",
"react": "16.7.0",
"react-app-polyfill": "0.2.0",
"react-dev-utils": "7.0.1",
"react-dom": "16.7.0",
"resolve": "1.8.1",
"webpack": "4.19.1",
"webpack-dev-server": "3.1.14",
"webpack-manifest-plugin": "2.0.4",
"workbox-webpack-plugin": "3.6.3"
}
尝试执行本教程所说的关于运行SSR with react的内容。我的index.js看起来像这样：
require('@babel/polyfill');
require('@babel/register')({
ignore: [/\/(build|node_modules)\//,
],
presets: ['@babel/preset-env','@babel/preset-react'],
plugins: [
'@babel/plugin-syntax-dynamic-import',
'dynamic-import-node',
]
});
require('./server');
server.js
import express from 'express';
import path from 'path';
import React from 'react';
import { renderToString } from 'react-dom/server';
import App from '../src/App'
const app = express();
const PORT = process.env.PORT || 3000;
const router = express.Router()
const serverRenderer = (req, res, next) => {
fs.readFile(path.resolve('./build/index.html'), 'utf8', (err, data) => {
if (err) {
console.error(err)
return res.status(500).send('An error occurred')
}
return res.send(
data.replace(
'<div id="root"></div>',
`<div id="root">${ReactDOMServer.renderToString(<App />)}</div>`
)
)
})
}
router.use('^/$', serverRenderer)
router.use(
express.static(path.resolve(__dirname, '..', 'build'), { maxAge: '30d' })
)
// tell the app to use the above rules
app.use(router)
app.listen(PORT, () => {
console.log(`SSR running on port ${PORT}`)
})
从CLI运行时，如下所示：
npm run build
cross-env NODE_ENV=production node server/index.js
我一直都会遇到这个错误：
/Users/myfolder/workspace/webapp/node_modules/@babel/runtime/helpers/esm/classCallCheck.js:1
(function (exports, require, module, __filename, __dirname) { export default function _classCallCheck(instance, Constructor) {
^^^^^^
SyntaxError: Unexpected token export
at new Script (vm.js:84:7)
at createScript (vm.js:264:10)
at Object.runInThisContext (vm.js:312:10)
at Module._compile (internal/modules/cjs/loader.js:694:28)
at Module._compile (/Users/myfolder/workspace/webapp/node_modules/pirates/lib/index.js:83:24)
at Module._extensions..js (internal/modules/cjs/loader.js:745:10)
at Object.newLoader [as .js] (/Users/myfolder/workspace/webapp/node_modules/pirates/lib/index.js:88:7)
at Module.load (internal/modules/cjs/loader.js:626:32)
at tryModuleLoad (internal/modules/cjs/loader.js:566:12)
at Function.Module._load (internal/modules/cjs/loader.js:558:3)
更新：如果我进入服务器文件夹，我能够成功运行节点服务器。我的文件夹结构是：myapp / src / server / index.js
这很有效 - 但并不理想。
cd myapp / src / server cross-env NODE_ENV =生产节点index.js
我没有得到上述错误。我正在使用webpack构建应用程序，让我觉得这与我的webpack配置有关。
回答如下：我能够通过为babel添加根目录来解决这个问题。 'root'是babel的配置加载选项，它指定当前babel项目的概念根文件夹。我的cwd是src。 src / server / index.js现在看起来像这样。
require('@babel/polyfill');
require('@babel/register')({
ignore: [/\/(build|node_modules)\//],
root:"./server",
presets: ['@babel/preset-env','@babel/preset-react'],
plugins: [
'@babel/plugin-syntax-dynamic-import',
'dynamic-import-node',
]
});
require('./server');
SyntaxError：尝试使用@ babel / register时出现意外的令牌
当尝试使用Babel运行节点并做出反应时，@ babel / register不起作用
我查看了SO上的类似问题，重新安装了节点10.15.1，升级到最新版本11.9。
以下是package.json中的相关依赖项：
"dependencies": {
"@babel/core": "7.1.6",
"@babel/polyfill": "^7.2.5",
"@babel/register": "^7.0.0",
"@svgr/webpack": "2.4.1",
"babel-core": "7.0.0-bridge.0",
"babel-jest": "23.6.0",
"babel-loader": "8.0.4",
"babel-plugin-named-asset-import": "0.3.0",
"babel-preset-react-app": "7.0.0",
"react": "16.7.0",
"react-app-polyfill": "0.2.0",
"react-dev-utils": "7.0.1",
"react-dom": "16.7.0",
"resolve": "1.8.1",
"webpack": "4.19.1",
"webpack-dev-server": "3.1.14",
"webpack-manifest-plugin": "2.0.4",
"workbox-webpack-plugin": "3.6.3"
}
尝试执行本教程所说的关于运行SSR with react的内容。我的index.js看起来像这样：
require('@babel/polyfill');
require('@babel/register')({
ignore: [/\/(build|node_modules)\//,
],
presets: ['@babel/preset-env','@babel/preset-react'],
plugins: [
'@babel/plugin-syntax-dynamic-import',
'dynamic-import-node',
]
});
require('./server');
server.js
import express from 'express';
import path from 'path';
import React from 'react';
import { renderToString } from 'react-dom/server';
import App from '../src/App'
const app = express();
const PORT = process.env.PORT || 3000;
const router = express.Router()
const serverRenderer = (req, res, next) => {
fs.readFile(path.resolve('./build/index.html'), 'utf8', (err, data) => {
if (err) {
console.error(err)
return res.status(500).send('An error occurred')
}
return res.send(
data.replace(
'<div id="root"></div>',
`<div id="root">${ReactDOMServer.renderToString(<App />)}</div>`
)
)
})
}
router.use('^/$', serverRenderer)
router.use(
express.static(path.resolve(__dirname, '..', 'build'), { maxAge: '30d' })
)
// tell the app to use the above rules
app.use(router)
app.listen(PORT, () => {
console.log(`SSR running on port ${PORT}`)
})
从CLI运行时，如下所示：
npm run build
cross-env NODE_ENV=production node server/index.js
我一直都会遇到这个错误：
/Users/myfolder/workspace/webapp/node_modules/@babel/runtime/helpers/esm/classCallCheck.js:1
(function (exports, require, module, __filename, __dirname) { export default function _classCallCheck(instance, Constructor) {
^^^^^^
SyntaxError: Unexpected token export
at new Script (vm.js:84:7)
at createScript (vm.js:264:10)
at Object.runInThisContext (vm.js:312:10)
at Module._compile (internal/modules/cjs/loader.js:694:28)
at Module._compile (/Users/myfolder/workspace/webapp/node_modules/pirates/lib/index.js:83:24)
at Module._extensions..js (internal/modules/cjs/loader.js:745:10)
at Object.newLoader [as .js] (/Users/myfolder/workspace/webapp/node_modules/pirates/lib/index.js:88:7)
at Module.load (internal/modules/cjs/loader.js:626:32)
at tryModuleLoad (internal/modules/cjs/loader.js:566:12)
at Function.Module._load (internal/modules/cjs/loader.js:558:3)
更新：如果我进入服务器文件夹，我能够成功运行节点服务器。我的文件夹结构是：myapp / src / server / index.js
这很有效 - 但并不理想。
cd myapp / src / server cross-env NODE_ENV =生产节点index.js
我没有得到上述错误。我正在使用webpack构建应用程序，让我觉得这与我的webpack配置有关。
回答如下：我能够通过为babel添加根目录来解决这个问题。 'root'是babel的配置加载选项，它指定当前babel项目的概念根文件夹。我的cwd是src。 src / server / index.js现在看起来像这样。
require('@babel/polyfill');
require('@babel/register')({
ignore: [/\/(build|node_modules)\//],
root:"./server",
presets: ['@babel/preset-env','@babel/preset-react'],
plugins: [
'@babel/plugin-syntax-dynamic-import',
'dynamic-import-node',
]
});
require('./server');