The link says that "Some third-party packages don't compile their code to ES5 before publishing to npm. This often causes problems in the ecosystem because neither browsers (except for most modern versions) nor some tools currently support all ES6 features. We recommend to publish code on npm as ES5 at least for a few more years."
I get an error when using react and pushing to heroku
Failed to minify code from this file: ./node_modules/newsapi/index.js:17
Read more here: http://bit.ly/2tRViJ9
The link says that "Some third-party packages don't compile their code to ES5 before publishing to npm. This often causes problems in the ecosystem because neither browsers (except for most modern versions) nor some tools currently support all ES6 features. We recommend to publish code on npm as ES5 at least for a few more years."