A place for developers to talk about building on Farcaster.

/dev

Anyone know how to create an asynchronous type predicate in TS?

Neovim enjoyer, "a gift to the culture" | Building at /thirdweb

Staff Eng at Iron Fish 🐟 • Building BlockSocks 🧦 • Denver, CO 📍

Yeah this is exactly what I need. From my (very intermediate) understanding of TS though it's not possible to do safely. TS can't infer an async result without some sort of manual type assertion

Just curious, would the async type predicate await the value?

There's been a feature request for that that's been open for a few years. https://github.com/microsoft/typescript/issues/37681