Summary:

This is a mitigation for facebook#1549.

Updates `babel-plugin-syntax-hermes-parser` to abort when the file contents do not include `flow`.

**Context: React Native**

Originally changed in facebook/react-native#46696, as our internal Flow support had diverged from `babel/plugin-syntax-flow` (facebook/react-native#46601).

We effectively have three flavours of JavaScript in support:
- Flow@latest for the `react-native` package, shipped as source — uses `hermes-parser`.
- TypeScript for product code (community template, Expo) — uses `babel/plugin-syntax-typescript`.
- Plain JavaScript/JSX in product code, *which may be extended with additional user Babel plugins and needs lenient parsing* — uses base `babel/parser` (**this change**).

I'd love to simplify this 😅.

Reviewed By: cipolleschi

Differential Revision: D65272155

Summary:

This is a mitigation for facebook#1549.

Updates `babel-plugin-syntax-hermes-parser` to abort when the file contents do not include `flow`.

**Context: React Native**

Originally changed in facebook/react-native#46696, as our internal Flow support had diverged from `babel/plugin-syntax-flow` (facebook/react-native#46601).

We effectively have three flavours of JavaScript in support:
- Flow@latest for the `react-native` package, shipped as source — uses `hermes-parser`.
- TypeScript for product code (community template, Expo) — uses `babel/plugin-syntax-typescript`.
- Plain JavaScript/JSX in product code, *which may be extended with additional user Babel plugins and needs lenient parsing* — uses base `babel/parser` (**this change**).

I'd love to simplify this 😅.

Reviewed By: robhogan, cipolleschi

Differential Revision: D65272155

Summary:

This is a mitigation for facebook#1549.

Updates `babel-plugin-syntax-hermes-parser` to abort when the file contents do not include `flow`.

**Context: React Native**

Originally changed in facebook/react-native#46696, as our internal Flow support had diverged from `babel/plugin-syntax-flow` (facebook/react-native#46601).

We effectively have three flavours of JavaScript in support:
- Flow@latest for the `react-native` package, shipped as source — uses `hermes-parser`.
- TypeScript for product code (community template, Expo) — uses `babel/plugin-syntax-typescript`.
- Plain JavaScript/JSX in product code, *which may be extended with additional user Babel plugins and needs lenient parsing* — uses base `babel/parser` (**this change**).

I'd love to simplify this 😅.

Differential Revision: D65272155

Summary:

This is a mitigation for facebook#1549.

Updates `babel-plugin-syntax-hermes-parser` to abort when the file contents do not include `flow`.

**Context: React Native**

Originally changed in facebook/react-native#46696, as our internal Flow support had diverged from `babel/plugin-syntax-flow` (facebook/react-native#46601).

We effectively have three flavours of JavaScript in support:
- Flow@latest for the `react-native` package, shipped as source — uses `hermes-parser`.
- TypeScript for product code (community template, Expo) — uses `babel/plugin-syntax-typescript`.
- Plain JavaScript/JSX in product code, *which may be extended with additional user Babel plugins and needs lenient parsing* — uses base `babel/parser` (**this change**).

I'd love to simplify this 😅.

Differential Revision: D65272155

Summary:

This is a mitigation for facebook#1549.

Updates `babel-plugin-syntax-hermes-parser` to abort when the file contents do not include `flow`.

**Context: React Native**

Originally changed in facebook/react-native#46696, as our internal Flow support had diverged from `babel/plugin-syntax-flow` (facebook/react-native#46601).

We effectively have three flavours of JavaScript in support:
- Flow@latest for the `react-native` package, shipped as source — uses `hermes-parser`.
- TypeScript for product code (community template, Expo) — uses `babel/plugin-syntax-typescript`.
- Plain JavaScript/JSX in product code, *which may be extended with additional user Babel plugins and needs lenient parsing* — uses base `babel/parser` (**this change**).

I'd love to simplify this 😅.

Differential Revision: D65272155

Summary:

This is a mitigation for facebook#1549.

Updates `babel-plugin-syntax-hermes-parser` to abort when the file contents do not include `flow`.

**Context: React Native**

Originally changed in facebook/react-native#46696, as our internal Flow support had diverged from `babel/plugin-syntax-flow` (facebook/react-native#46601).

We effectively have three flavours of JavaScript in support:
- Flow@latest for the `react-native` package, shipped as source — uses `hermes-parser`.
- TypeScript for product code (community template, Expo) — uses `babel/plugin-syntax-typescript`.
- Plain JavaScript/JSX in product code, *which may be extended with additional user Babel plugins and needs lenient parsing* — uses base `babel/parser` (**this change**).

I'd love to simplify this 😅.

Reviewed By: vzaidman

Differential Revision: D65272155

Summary:
Release version to 0.25.1

This release includes #1556, which will be configured in React Native to opt-out from `hermes-parser` under Babel for untyped JS — fixing compat with 3P plugins by users.

(See facebook/react-native#46601, facebook/react-native#46696.)

Reviewed By: cortinico

Differential Revision: D65661003

fbshipit-source-id: faa0ea0a507b2b46ef7cf52fdabe3e3ff0a3851e

Summary:
Original Author: huntie@meta.com
Original Git: f2970e7
Original Reviewed By: pieterv
Original Revision: D65272155

Pull Request resolved: #1556

This is a mitigation for #1549.

Updates `babel-plugin-syntax-hermes-parser` to include a new `parseLangTypes` option, which we will configure in React Native's Babel preset to abort when the file contents do not include `flow`.

**Context: React Native**

Originally changed in facebook/react-native#46696, as our internal Flow support had diverged from `babel/plugin-syntax-flow` (facebook/react-native#46601).

We effectively have three flavours of JavaScript in support:
- Flow@latest for the `react-native` package, shipped as source — uses `hermes-parser`.
- TypeScript for product code (community template, Expo) — uses `babel/plugin-syntax-typescript`.
- Plain JavaScript/JSX in product code, *which may be extended with additional user Babel plugins and needs lenient parsing* — uses base `babel/parser` (**this change**).

I'd love to simplify this 😅.

Reviewed By: mattbfb

Differential Revision: D65787624

fbshipit-source-id: b06f1499b2d02462777ac72f03d8bb5c713b0a19

Summary:
Original Author: huntie@meta.com
Original Git: 15e9b5c
Original Reviewed By: cortinico
Original Revision: D65661003

Release version to 0.25.1

This release includes #1556, which will be configured in React Native to opt-out from `hermes-parser` under Babel for untyped JS — fixing compat with 3P plugins by users.

(See facebook/react-native#46601, facebook/react-native#46696.)

Reviewed By: mattbfb

Differential Revision: D65787623

fbshipit-source-id: f6b56d44cdb992ca01de75df384b4599bef8432b