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---
id: babel-plugin-transform-flow-strip-types
title: @babel/plugin-transform-flow-strip-types
sidebar_label: transform-flow-strip-types
---

Example

In

function foo(one: any, two: number, three?): string {}

Out

function foo(one, two, three) {}

Installation

npm install --save-dev @babel/plugin-transform-flow-strip-types

Usage

Via .babelrc (Recommended)

.babelrc

{
  "plugins": ["@babel/plugin-transform-flow-strip-types"]
}

Via CLI

babel --plugins @babel/plugin-transform-flow-strip-types script.js

Via Node API

require("@babel/core").transform("code", {
  plugins: ["@babel/plugin-transform-flow-strip-types"]
});

Options

requireDirective

boolean, defaults to false.

Setting this to true will only strip annotations and declarations from files that contain the // @flow directive. It will also throw errors for any Flow annotations found in files without the directive.