nodemon，babel-node：如何设置环境变量？

Question

Dev environment starts with this command:

nodemon -w src --exec \"babel-node src --presets es2015,stage-0\"

How do i create a global variable (or process.env variable) __DEV__ = true ?

Answer 1

You can either add "env" property to nodemon.json , like this:

...
"env": {
    "__DEV__": "true"
}

Or you can prepend __DEV__="true" to start script in package.json . Both worked for me.

Answer 2

You can add a "nodemonConfig" property to package.json with your env info. Then execute nodemon in your scripts section.

"nodemonConfig": {
  "restartable": "rs",
  "ignore": [
  "node_modules/**/node_modules"
  ],
  "delay": "2500",
  "env": {
    "NODE_ENV": "development",
    "NODE_CONFIG_DIR": "./config"
  }
}

Answer 3

If you don't want to handle the env variables in the nodemon call, you can do something like this.

1) Create a file called '.env' and put something like this in it: DEV =true

2) Then in your application entry file put the following line in as early as possible:

require('dotenv').config();

Answer 4

I normally use the dotenv module on my projects.

We just need to create a .env file and require the dotenv module in our project:

.env file :

 __DEV__="true"

your-script.js file :

require('dotenv').config();

console.log(process.env.__DEV__)

Creating .env files is normally a good option since we can prevent to commit our environment files using .gitignore

Answer 5

对于 Windows：设置DEV = true&&nodemon -w src --exec "babel-node src --presets es2015,stage-0"

Answer 6

只需在代码（服务器文件）中定义proccess.env.VARIABLE="true"