我目前正在尝试将cra-unviersal应用程序部署到firebase功能。因此，我关注了this guide.
构建等并尝试部署后，函数返回1724问题，其中509为错误：
...
/Users/user/Documents/Entwicklung/React/auriga_final/functions/crau-dist/server/bundle.js
1:1 error Expected an assignment or function call and instead saw an expression no-unused-expressions
1:139 warning Unexpected use of comma operator no-sequences
1:157 error Expected an assignment or function call and instead saw an expression no-unused-expressions
...
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! functions@ lint: `eslint .`
npm ERR! Exit status 1
npm ERR!
功能package.json，类似于root的package.json：
"dependencies": {
"firebase-admin": "^8.6.0",
"firebase-functions": "^3.3.0",
"bootstrap": "^4.4.1",
"history": "^4.10.1",
"react": "^16.12.0",
"react-dom": "^16.12.0",
"react-router-dom": "^5.1.2",
"react-scripts": "3.3.0",
"smoothscroll-polyfill": "^0.4.4"
},
"devDependencies": {
"eslint": "^5.12.0",
"eslint-plugin-promise": "^4.0.1",
"firebase-functions-test": "^0.1.6",
"cra-universal": "^4.3.1"
},
在/ functions内部运行npm i后可能会引起注意的警告：
npm WARN babel-preset-cra-universal@4.3.1 requires a peer of @babel/core@7.5.5 but none is installed. You must install peer dependencies yourself.
npm WARN babel-preset-cra-universal@4.3.1 requires a peer of @babel/core@7.5.5 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-react-app@5.1.0 requires a peer of eslint@6.x but none is installed. You must install peer dependencies yourself.
npm WARN tsutils@3.17.1 requires a peer of typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta but none is installed. You must install peer dependencies yourself.
顺便说一句，该指南说要更新crau.config.js-通过使用npx cra-universal init我可以创建这样的文件，但是它说env没有定义：
module.exports = {
modifyWebpack: config => {
const newConfig = {
...config,
output: {
...config.output,
libraryTarget: 'commonjs2'
},
entry: env ? './server/index.js' : './server/app.js'
};
return newConfig;
}
};