None of the examples they've cited at the bottom of that post are actual contributions to a popular open-source project, but seems more like stuff that's been built as a standalone project.
I previously contributed to the mljs libraries and used the opportunity to add a new feature and demonstrate that I knew how to unit test etc.
Should have made a disclaimer!
I previously contributed to the mljs libraries and used the opportunity to add a new feature and demonstrate that I knew how to unit test etc.