Front-end development is tricky: it’s not difficult to learn, but it’s quite difficult to master. There are just too many things that need… (more…)

At Facebook, we often need to access deeply nested values in data structures fetched with GraphQL. On the way to accessing these deeply nested values, it is common for one or more intermediate fields to be nullable. These intermediate fields may be null f... (more…)

How Array.isArray works, and how we can use symbols to create our own type-matching functions. (more…)

📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2019) - goldbergyoni/javascript-testing-best-practices... (more…)

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