@babel/plugin-transform-flow-strip-types
Advanced tools
Package description
The @babel/plugin-transform-flow-strip-types npm package is a plugin for Babel, a JavaScript compiler, that removes type annotations from Flow, a static type checker for JavaScript. This allows developers to write type-safe code during development and strip out these annotations for production builds, resulting in clean JavaScript that can be executed in environments that do not support Flow.
Stripping Flow Type Annotations
This feature removes Flow type annotations from your JavaScript files, converting typed code into plain JavaScript. The code sample shows a function with Flow types that are stripped out after transformation.
import { foo } from 'bar';
function square(n: number): number {
return n * n;
}
// Transformed to:
import { foo } from 'bar';
function square(n) {
return n * n;
}Similar to @babel/plugin-transform-flow-strip-types, this Babel plugin strips TypeScript annotations from the code. While both plugins serve a similar purpose of removing type annotations, they cater to different type systems: Flow for the former and TypeScript for the latter.
This plugin also deals with Flow types but instead of stripping them, it converts them into comments. This can be useful for preserving type annotations in the transpiled output without affecting the runtime behavior.
Readme
Strip all flow type annotations and declarations from your output code.
In
function foo(one: any, two: number, three?): string {}
Out
function foo(one, two, three) {}
npm install --save-dev @babel/plugin-transform-flow-strip-types
.babelrc (Recommended).babelrc
{
"plugins": ["@babel/plugin-transform-flow-strip-types"]
}
babel --plugins @babel/plugin-transform-flow-strip-types script.js
require("@babel/core").transform("code", {
plugins: ["@babel/plugin-transform-flow-strip-types"]
});
requireDirectiveboolean, 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.
FAQs
Strip flow type annotations from your output code.
We found that @babel/plugin-transform-flow-strip-types demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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