This post looks at the Closure Compiler, Google's tool from the mid-2000s for adding types to JavaScript. It looks at how its focus on minification led to very different design choices than TypeScript, and how this and a few other factors led to TypeScript becoming the ubiquitous solution for JavaScript + types. The Closure Compiler represents an alternative path that JavaScript could have taken, and it gives us perspective on TypeScript as it exists today.

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FoxTrot by Bill Amend | September 24, 2023