In JS, commonjs require followed by access expression can't import from ES

[sandersn]

For the program

// @filename: main.js
const x = require('ch').x
x
x.grey
// @filename: ch.js
const x = {
 grey: {}
}
export { x }

Expected behavior:

No error, and x: { grey: {} }

Actual behavior:

on const x = require, error that 'x is unused'
on x.grey, error that 'cannot find name x'

Based on a failure from office-ui-fabric in a JS script that uses chalk. (and, notably uses export default, so that needs to be tested too)

Works if you use commonjs exports:

const x = { grey: { } }
module.exports.x = x

[sandersn]

The commonjs-specific code for resolving access expressions on require('ch') assumes a fake commonjs export. It needs to call resolveSymbol on a real export since it will be an alias.