Question

我是create-react-app的新手。

我刚刚使用redux和react-router-dom进行了新的设置，然后将其推到Scalingo，然后是Heroku，两个人最终都为开发版本服务。我的redux-logger已打开，React开发工具警告：

此页面使用React的开发版本。

我没有做任何定制部署的事情，只是推向生产阶段。

我做错了什么？

Scalingo部署日志：

<-- Start deployment of ***** -->
       Fetching source code
       Fetching deployment cache
-----> Creating runtime environment

       NPM_CONFIG_LOGLEVEL=error
       NPM_CONFIG_PRODUCTION=true
       NODE_VERBOSE=false
       NODE_ENV=production
       NODE_MODULES_CACHE=true
-----> Installing binaries
       engines.node (package.json):  unspecified
       engines.npm (package.json):   unspecified (use default)
       engines.yarn (package.json):  unspecified (use default)

       Resolving node version 8.x...
       Downloading and installing node 8.15.0...
       Using default npm version: 6.4.1
       Resolving yarn version 1.x...
       Downloading and installing yarn (1.14.0)...
       Installed yarn 1.14.0
-----> Restoring cache
       Loading 2 from cacheDirectories (default):
       - node_modules
       - bower_components (not cached - skipping)
-----> Building dependencies
       Installing node modules (yarn.lock)
       yarn install v1.14.0
       [1/4] Resolving packages...
       success Already up-to-date.
       Done in 0.60s.
       Running build (yarn)
       yarn run v1.14.0
       $ react-scripts build
       Creating an optimized production build...
       Compiled successfully.

       File sizes after gzip:

       161.32 KB  build/static/js/2.21f749f2.chunk.js
       1.15 KB    build/static/js/main.e65e7a00.chunk.js
       761 B      build/static/js/runtime~main.fdfcfda2.js

       The project was built assuming it is hosted at the server root.
       You can control this with the homepage field in your package.json.
       For example, add this to build it for GitHub Pages:

       "homepage" : "http://myname.github.io/myapp",

       The build folder is ready to be deployed.
       You may serve it with a static server:

       yarn global add serve
       serve -s build

       Find out more about deployment here:

       https://facebook.github.io/create-react-app/docs/deployment

       Done in 7.79s.
-----> Caching build
       Clearing previous node cache
       Saving 2 cacheDirectories (default):
       - node_modules
       - bower_components (nothing to cache)
-----> Build succeeded!
 Build complete, shipping your container...
 Waiting for your application to boot... 
 <-- https://*****.scalingo.io -->

package.json：

{
  "name": *****,
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@sentry/browser": "^4.5.4",
    "husky": "^1.3.1",
    "lint-staged": "^8.1.3",
    "prettier": "^1.16.4",
    "prop-types": "^15.7.1",
    "react": "^16.8.1",
    "react-dom": "^16.8.1",
    "react-redux": "^6.0.0",
    "react-redux-i18n": "^1.9.3",
    "react-router-dom": "^4.3.1",
    "react-scripts": "2.1.5",
    "redux": "^4.0.1",
    "redux-logger": "^3.0.6",
    "redux-promise": "^0.6.0",
    "redux-thunk": "^2.3.0"
  },
  "lint-staged": {
    "src/**/*.{js,jsx,ts,tsx,json,css,scss,md}": [
      "prettier --single-quote --trailing-comma all --write",
      "git add"
    ]
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": [
    ">0.2%",
    "not dead",
    "not ie <= 11",
    "not op_mini all"
  ],
  "husky": {
    "hooks": {
      "pre-commit": "lint-staged"
    }
  }
}

Answer 1

Heroku中的服务器将运行文件package.json中给出的启动脚本。默认情况下，使用create-react-app时，启动脚本将在开发模式下运行该应用程序。

为了从build文件夹运行优化的应用程序，您将需要编写服务器。您可以将以下代码用于简单的服务器。确保将其保存为一个名为server.js的文件，并将其放置在存储库的根目录中。

const express = require('express');
const favicon = require('express-favicon');
const path = require('path');
const port = process.env.PORT || 8080;
const app = express();
app.use(favicon(__dirname + '/build/favicon.ico'));
// the __dirname is the current directory from where the script is running
app.use(express.static(__dirname));
app.use(express.static(path.join(__dirname, 'build')));
app.get('/ping', function (req, res) {
  return res.send('pong');
});
app.get('/*', function (req, res) {
  res.sendFile(path.join(__dirname, 'build', 'index.html'));
});
app.listen(port);

您将需要添加以下依赖项：

表达
express-favicon
路径

最后，更改package.json，以便启动脚本运行服务器。为了能够继续运行开发模式，可以为其提供另一个脚本。

"scripts": {
  "build": "react-scripts build",
  "devstart": "react-scripts start",
  "start": "node server.js"
  "test": "react-scripts test",
  "eject": "react-scripts eject"
}

将更改推送到Heroku，您的应用程序应该可以正常运行。

您可以在本文中详细了解它。
https://medium.com/jeremy-gottfrieds-tech-blog/tutorial-how-to-deploy-a-production-react-app-to-heroku-c4831dfcfa08

Answer 2

我添加了一个带有正确执行命令的 Procfile，并在 package.json 脚本中包含了 heroku 的预构建步骤：

package.json：

 "scripts": {
       "heroku-prebuild": "npm install -g serve",  // <- NEW 
       "start": "react-scripts start",
       "build": "react-scripts build",
       "test": "react-scripts test",
       "eject": "react-scripts eject",
 },

Procfile：

web: serve -s build

Answer 3

我的工作解决方案是将package.json修改为：

 "scripts": {
       "heroku-prebuild": "npm install -g serve",
       "devstart": "react-scripts start",
       "start": "serve -s build",
       "build": "react-scripts build",
       "eject": "react-scripts eject",
 },

使用“ heroku-prebuild”，您无需安装任何其他代码即可安装服务。

Heroku服务于create-react-app开发构建而不是生产

3 个答案: