将参数传递给 npm run "my command" 并在我的函数中使用该参数

Question

考虑app.js

const { doCoolStuff } = require("./api/myApi");
// grab param from command line into "myParam"


doCoolStuff(myParam);

... // more code 

和Package.json：

{
  "name": "-------",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "send": "node app.js"
  },
  
  ... 
}

app.js运行时如何传递参数npm run send？

就像是npm run send myEmail@myDomain.com

Answer 1

Npm 将解析您传递给脚本的任何参数，除非它是在 -- 后跟一个空格之后传递的。npm 解析它们后，它们将在环境变量中的 npm_config_ 下可用。

{
      "scripts": {
        "send": "echo \"send email to $npm_config_name @ $npm_config_mail "
      }
    }

然后运行

npm run send --mail=xyz.com --name=sample

输出：send email to sample@xyz.com

Answer 2

const params = process.argv.slice(2)

现在这个 param 变量包含了通过 npm run 命令传递的所有参数。

npm run send myEmail@domain.com

params[0] // this will provide you with the value myEmail@domain.com