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Lyn Muldrow for Tidelift

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Five minute maintainers: Meet Felix Böhm 👋🏾

Our new five minute maintainer series shares the journeys and opinions of the maintainers behind some of the most widely used projects in open source. We ask five big questions in five minutes, with the goal of elevating the voices of open source maintainers who create the open source projects we all rely on.

In our first in the series, we’d like to introduce you to Felix Böhm. Felix maintains Cheerio and a host of other useful packages, and his contributions to open source were born from a love of exploration and gaming. Watch to learn more about how Felix got started, and his impressions on the industry today!

Are you a maintainer who would like to be featured in our five minute maintainer series? Reach out to Lyn Muldrow, Senior Maintainer Advocate, at

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11 Tips That Make You a Better Typescript Programmer


1 Think in {Set}

Type is an everyday concept to programmers, but it’s surprisingly difficult to define it succinctly. I find it helpful to use Set as a conceptual model instead.

#2 Understand declared type and narrowed type

One extremely powerful typescript feature is automatic type narrowing based on control flow. This means a variable has two types associated with it at any specific point of code location: a declaration type and a narrowed type.

#3 Use discriminated union instead of optional fields


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