rollup-plugin-typescript2: Cannot import plugin with `ts-node`

I am using this in a gulp to compile using gulp-better-rollup when importing it uses the typings from dist and loads rollup-plugin-typescript2.cjs.js

However rollup does not export the default as default in cjs

Using

import typescript from "rollup-plugin-typescript2"

results in TypeError: rollup_plugin_typescript2_1.default is not a function.

To work around this I have had to import like this

import * as typescript from "rollup-plugin-typescript2"

Then cast as any to invoke.

plugins: [
        (typescript as any)()
]

Also the interface for the options does not match the documentation, as the typeings has the options object as required and all properties as required.

About this issue

Original URL
State: closed
Created 7 years ago
Reactions: 1
Comments: 16 (10 by maintainers)

Most upvoted comments

Looks like there are bunch of workarounds, closing for now.

ezolenko on Jan 18, 2019

If you use a gulpfile.ts, using typescript 2.8 and "esModuleInterop": true option you can import this with

import typescript from "rollup-plugin-typescript2";

enabling this option, can change other import behaviours (if an import fails at runtime try removing * as from that import, or adding it).

j-oliveras on Mar 28, 2018

Yup, I find this to be a frequent issue with interoperability between Typescript’s and Rollup’s interpretations of the module system.

Two ways to fix it:

Consumers can set this compilerOption to true in their tsconfig.json: allowSyntheticDefaultImports: true
rollup-plugin-typescript2 could offer both a named and a default export of the transformer function.

wessberg on Aug 28, 2017