submodule.md

submodule

Options for resolving submodules in installed modules (import foo from 'bar/foo').

Must be set to an object to be enabled. That object may contain the following options.

submodule.extensions

A list of extensions to resolve when importing a module's submodules.

[".js", ".json"]

submodule.ignoreUnresolved

Set to true to ignore any submodule modules that cannot be resolved.

submodule.ignoreExports

Set to true to ignore any modules that have an exports entry (very important).

Examples

Example .mjs + .js

.babelrc

{
	"presets": [
		[
			"@babel/preset-env",
			{
				"modules": false,
				"targets": {
					"node": "current"
				}
			}
		]
	],
	"plugins": [
		[
			"esm-resolver",
			{
				"submodule": {
					"extensions": [".mjs", ".js"],
					"ignoreExports": true
				}
			}
		]
	]
}

src/main.js

import {foo} from 'bar/foo';

output:

import {foo} from 'bar/foo.mjs';