Is there a recommended way to use esm for smooth upgrade once Node.js support ESModule ?

[ishowman]

Before Node.js finally support ESModule, I apply esm to my project. For upgrading smoothly once Node.js support it, I draw a plan like this:

• every module has a file named index.mjs where I wrote my code with ESModule
• near every module, I create a file named index.js, and codes inner like this:

  require = require("esm")(module);
  module.exports = require("./index.mjs").;

  When it's able to use ESModule in Node.js, I just need to delete index.js and rename index.mjs file to index.js，then it should works.

  ---

  But I notice docs ".mjs files are limited to basic functionality without support for esm options.", which means my thought above will not work for options in .esmrc.json won't work. And when try it locally, it throw errors "can't not load module from .mjs"，after I change .mjs to .js，the error disappear。

So is there a smooth and convenient upgrade solution recommended?

[gudinoff]

What if instead of "index.mjs" you name the file as "index.main.js"?