javascript - 错误 [ERR_REQUIRE_ESM] : How to use es6 modules in node 12?

Question

来自https://2ality.com/2019/04/nodejs-esm-impl.html Node 12应该支持es6模块；但是，我不断收到错误:

问题:如何在 Node 12 中使用 es6 模块制作 MVP？

package.json

{
  "name": "dynamic-es6-mod",
  "version": "1.0.0",
  "description": "",
  "main": "src/index.mjs",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node src/index.mjs"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "globby": "^10.0.1"
  }
}

$ node -v
$ 12.6.0
$ npm run start


internal/modules/cjs/loader.js:821
  throw new ERR_REQUIRE_ESM(filename);
Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /Users/dev/dynamic-es6-mod/src/index.mjs
    at Object.Module._extensions..mjs (internal/modules/cjs/loader.js:821:9)
    at Module.load (internal/modules/cjs/loader.js:643:32)
    at Function.Module._load (internal/modules/cjs/loader.js:556:12)
    at Function.Module.runMain (internal/modules/cjs/loader.js:839:10)
    at internal/main/run_main_module.js:17:11

Answer 1

official documentation对于模块状态，v2 应与 require() 一起使用。

有一个解决方法。相反，它可以异步加载:

const fetch = (...args) => import('node-fetch').then(({default: fetch}) => fetch(...args));