node.js “NODE_ENV”不是内部或外部命令、可操作命令或批处理文件
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"NODE_ENV" is not recognized as an internal or external command, operable command or batch file
提问by krozero
I'm trying to setup an environment for a Node.js app. but I'm getting this error every time.
我正在尝试为 Node.js 应用程序设置环境。但我每次都会收到这个错误。
"NODE_ENV" is not recognized as an internal or external command, operable command or batch file.
“NODE_ENV”不是内部或外部命令、可操作命令或批处理文件。
What does this mean and how can I solve this problem?
这是什么意思，我该如何解决这个问题？
I'm using Windows and also tried set NODE_ENV=developmentbut had no luck.
我正在使用 Windows，也尝试过set NODE_ENV=development但没有运气。
回答by Jim O'Neil
It sounds like your error comes from an attempt to run something like this (which works in Linux)
听起来您的错误来自尝试运行这样的东西（在 Linux 中有效）
NODE_ENV=development node foo.js
the equivalent in Windows would be
Windows 中的等效项是
SET NODE_ENV=development
node foo.js
running in the same command shell. You mentioned set NODE_ENV did not work, but wasn't clear how/when you executed it.
在同一个命令 shell 中运行。您提到 set NODE_ENV 不起作用，但不清楚您如何/何时执行它。
回答by laggingreflex
I wrote a module for this: win-node-env.
我为此编写了一个模块：win-node-env。
It creates a NODE_ENV.cmdthat sets the NODE_ENVenvironment variable and spawns a child process with the rest of the command and its args.
它创建一个NODE_ENV.cmd设置NODE_ENV环境变量并使用其余命令及其参数生成子进程的。
Just install it (globally), and run your npm script commands, it should automatically make them work.
只需安装它（全局），然后运行您的 npm 脚本命令，它就会自动使它们工作。
npm install -g win-node-env
回答by Mahmudul Hasan
for windows use &in between command also. Like,
对于 windows&在命令之间也使用。喜欢，
"scripts": {
"start": "SET NODE_ENV=development & nodemon app/app.js",
}
回答by Susan-stack
npm install "cross-env"module.- modify the code as
cross-env NODE_ENV=development node foo.js. Then you can run the likenpm run build.
npm install "cross-env"模块。- 将代码修改为
cross-env NODE_ENV=development node foo.js. 然后你可以运行类似的npm run build。
回答by AmerllicA
Use win-node-env, For using it just run below command on your cmdor power shellor git bash:
使用共赢节点ENV，对于使用它只是在你运行下面的命令cmd或power shell或git bash：
npm install -g win-node-env
After it everything is like Linux.
在它之后，一切都像 Linux。
回答by Flion
set NODE_ENV=production & nodemon app/app.js
will cause NODE_ENV to contain a spaceat the end:
将导致 NODE_ENV在末尾包含一个空格：
process.env.NODE_ENV == 'production'; //false
process.env.NODE_ENV == 'production '; //true
As mentioned in a comment here, use this instead:
作为在评论中提到这里，用这个来代替：
NODE_ENV=production&& nodemon app/app.js
回答by Jon Crowell
Changing your scripts to accommodate Windows is a royal pain. Trying to figure out the appropriate Windows translations and maintaining 2 sets of scripts is no way to live your life.
更改脚本以适应 Windows 是一种极大的痛苦。试图找出合适的 Windows 翻译并维护 2 套脚本是没有办法过上你的生活的。
It's much easier to configure npm to use bash on Windows and your scripts will run as is.
将 npm 配置为在 Windows 上使用 bash 要容易得多，并且您的脚本将按原样运行。
Simply run npm config set script-shell "C:\\Program Files\\Git\\bin\\bash.exe". Make sure the path to the bash executable is correct for your machine. You'll likely need to start a new instance of the terminal for the change to take effect.
只需运行npm config set script-shell "C:\\Program Files\\Git\\bin\\bash.exe"。确保 bash 可执行文件的路径对于您的机器是正确的。您可能需要启动一个新的终端实例才能使更改生效。
The screenshot below illustrates the benefit.
下面的屏幕截图说明了好处。
- npm ERR! when trying to run script initially.
- Script modified for Windows use runs but doesn't show the return message.
- After updating npm config to use bash, the script runs and returns the appropriate message.
- 错误！最初尝试运行脚本时。
- 为 Windows 使用修改的脚本运行但不显示返回消息。
- 更新 npm config 以使用 bash 后，脚本将运行并返回相应的消息。
回答by user3790180
For those who uses Git Bash and having issues with npm run <script>,
对于那些使用 Git Bash 并遇到问题的人npm run <script>，
Just set npm to use Git Bash to run scripts
只需将 npm 设置为使用 Git Bash 来运行脚本
npm config set script-shell "C:\\Program Files\\git\\bin\\bash.exe"(change the path according to your installation)
npm config set script-shell "C:\\Program Files\\git\\bin\\bash.exe"（根据您的安装更改路径）
And then npm will run scripts with Git Bash, so such usages like NODE_ENV=will work properly.
然后 npm 将使用 Git Bash 运行脚本，所以像这样的用法NODE_ENV=会正常工作。
回答by Bang Andre
npm install -S cross-env
Worked for me
对我来说有效
回答by SirPhemmiey
Most of the answers up there didn't help me..
那里的大多数答案都没有帮助我..
What helped me was NODE_ENV=production&& nodemon app/app.js
帮助我的是 NODE_ENV=production&& nodemon app/app.js
Take note of the space. Good luck.
注意空间。祝你好运。
