如何在package.json中设置环境变量 [英] How to set environment variables from within package.json

问题描述

如何在package.json内设置一些环境变量，以与npm start类似的命令一起使用?

How to set some environment variables from within package.json to be used with npm start like commands?

这是我目前在package.json中拥有的内容:

Here's what I currently have in my package.json:

{
  ...
  "scripts": {
    "help": "tagove help",
    "start": "tagove start"
  }
  ...
}

我想在启动脚本中设置环境变量(例如NODE_ENV)，同时仍然能够仅使用一个命令npm start来启动应用程序.

I want to set environment variables (like NODE_ENV) in the start script while still being able to start the app with just one command, npm start.

推荐答案

在脚本命令中设置环境变量:

Set the environment variable in the script command:

...
"scripts": {
  "start": "node app.js",
  "test": "env NODE_ENV=test mocha --reporter spec"
},
...

然后在您的应用中使用process.env.NODE_ENV.

Then use process.env.NODE_ENV in your app.

注意:env确保它可以跨平台工作.如果只关心Mac/Linux，则可以忽略它.

Note: env ensures that it works across platforms. You can omit it if you only care about Mac/Linux.

这篇关于如何在package.json中设置环境变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！