soyuka/repro-default-export

Bug Reproduction repository

Related issues:

• infernojs/inferno#596
• rollup/rollup#1156
• microsoft/TypeScript#13017

Install

run bash init.sh

What's wrong?

In src/index.ts:

import createElement from 'inferno-create-element'
import Component from 'inferno-component'

console.log(createElement)
console.log(Component)

createElement and Component should have the value of the related package default export.

Though, if you run node dist/bundle.js, you'll get undefined

If you check out the compiled file, you will see something like:

const inferno_create_element_1 = __webpack_require__(3);
const inferno_component_1 = __webpack_require__(2);
console.log(inferno_create_element_1.default);
console.log(inferno_component_1.default);

But, rollup (which is used by Inferno) doesn't export any default:

true ? module.exports = factory(__webpack_require__(0)) :
typeof define === 'function' && define.amd ? define(['inferno'], factory) :
(global.Inferno = global.Inferno || {}, global.Inferno.createElement = factory(global.Inferno));

An alternative is to use the following import statements:

import * as createElement from 'inferno-create-element'
import * as Component from 'inferno-component'

console.log(createElement)
console.log(Component)

But by using this, typescript expects Objects and the module signatures are wrong, and therefore blocking the compilation.

For example, you won't be able to extend Component, because it's not recognized as a class.

Version used:

• typescript@2.1.4
• webpack@^2.1.0-beta.25
• trueadm/inferno#master