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@babel/preset-flow

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@babel/preset-flow

Babel preset for all Flow plugins.

  • 7.25.9
  • latest
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  • npm
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Weekly downloads
6.9M
increased by6.8%
Maintainers
4
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What is @babel/preset-flow?

The @babel/preset-flow npm package is a Babel preset for transforming Flow syntax. Flow is a static type checker for JavaScript, and this preset allows developers to strip Flow types from their source code to make it compatible with standard JavaScript environments. This is useful for projects that use Flow for type checking but need to remove the type annotations for production builds.

What are @babel/preset-flow's main functionalities?

Type Annotations Stripping

This code sample shows a class with Flow type annotations. The @babel/preset-flow will remove the ': number' type annotations when transforming the code.

class MyClass {
  size: number;

  constructor(size: number) {
    this.size = size;
  }
}

Interface Stripping

This code sample defines a Flow interface. The @babel/preset-flow will remove the entire interface declaration when transforming the code.

interface Serializable {
  serialize(): string;
}

Type Alias Removal

This code sample shows a Flow type alias. The @babel/preset-flow will remove the type alias when transforming the code.

type Point = {
  x: number,
  y: number
};

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Package last updated on 22 Oct 2024

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