---
title: "Types-First the only supported mode in Flow (Jan 2021)"
short-title: "Types-First only supported mode"
authors: [panagiotis-vekris]
medium-link: "https://medium.com/flow-type/types-first-the-only-supported-mode-in-flow-jan-2021-3c4cb14d7b6c"
---

:::info[Historical]
This post announced Types-First becoming the only supported mode when it was introduced. Syntax and behavior may have changed since this post was written.
:::

Types-First will become the only mode in Flow in v0.143 (mid Jan 2021).
