是否可以使用节点命令将 node.js 脚本作为模块运行（不使用 package.json）？

Question

Let's say I have a code.js file with the following node.js script:

const axios = require('axios')

async function getData(){
    const response = await axios.get('https://mypage.com.br')
    console.log(response.data)
}
getData()

If I execute it with node code.js it works perfectly fine... However, I'd like to execute it as a module, just so I can use the import statement and use the await command as top level. I'd like to accomplish that without creating a project with a package.json file. My final result would be something like this:

import axios from 'axios' 

const response = await axios.get('https://mypage.com.br')
console.log(response.data)

I haven't managed to make it work with the node command. I know there's a --input-type=module parameter I can use with it. But I've tried running node --input-type=module code.js and I've received the following error:

SyntaxError: Cannot use import statement outside a module

So, that means it's not even being recognized as a module yet. Is it possible to do? Can I execute an isolated script with the command node as a module (while using await on top level)?

Answer 1

Rename the file to name.mjs . This --input-type parameter only applies to STDIN and --eval -d files.

Answer 2

This isn't really possible from the command line. You have only two options for making your file ESM.

1. Edit package.json to have the following key and value.

    { "type": "module" }

2. Change the file extensions from .js to .mjs . The m stands for module .

In conclusion, the flag below doesn't help with changing the type to module.

$ node code.js --input-type=module

Answer 3

A different alternative without renaming the file is executing the code with a pipe . The following command works fine as a module:

cat code.js | node --input-type=module