Practical writing on TypeScript, React, Node.js and building a balanced developer life.
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Every JavaScript developer has written await Promise.all(items.map(async item =>...)). It works — until you hit a rate-limited API, a paginated async generator, or a ReadableStream. Array.fromAsync() is the purpose-built replacement you didn't know you needed.
You changed assert to with and everything worked again — but you have no idea why the syntax changed, whether it's safe to use, or what happens in environments that still expect assert. Here's the full story, the exact migration, and every edge case that will trip you up.
