@babel/plugin-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

all

boolean, defaults to false.

Flow will only parse Flow-specific features if a @flow pragma is present atop the file, or the all option isset inside the .flowconfig.

If you are using the all option in your Flow config, be sure to set this option to true to get matching behavior.

For example, without either of the above, the following call expression with a type argument:

f<T>(e)

Would get parsed as a nested binary expression:

f < T > e;

requireDirective

boolean, defaults to false.

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

You can read more about configuring plugin options here