Function Overloads in 2026: Use a Discriminated Param Instead
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Book: TypeScript Essentials — From Working Developer to Confident TS, Across Node, Bun, Deno, and the Browser Also by me: The TypeScript Library — the 5-book collection My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools Me: xgabriel.com | GitHub A team I talked to last month had a query helper that took three different shapes: a single ID, a list of IDs, or a filter object. The function had been written with overloads. Three d