相关疑难解决方法(0)

我在create-react-app中使用以下环境变量:

console.log(process.env.REACT_APP_API_URL) // http://localhost:5555

当我npm start通过读取.env文件运行时它可以工作:

REACT_APP_API_URL=http://localhost:5555

如何设置不同的值,如http://localhost:1234执行npm run build？

这是我的package.json档案:

{
  "name": "webapp",
  "version": "0.1.0",
  "private": true,
  "devDependencies": {
    "react-scripts": "0.9.0"
  },
  "dependencies": {
    "react": "^15.4.2",
    "react-dom": "^15.4.2"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  }
}