core.ts

import type { NativeSyntheticEvent } from "react-native";
import { NativeModules } from "react-native";

export type ReactNativeVersion = {
  major: number;
  minor: number;
  patch: number;
  prerelease?: string;
  getVersionString: () => string;
};

export const ReactNativeVersion: ReactNativeVersion = (() => {
  // https://github.com/facebook/react-native/commit/ec5638abd0e872be62b6ea5d8df9bed6335c2191
  const { ReactNativeVersion } = require("react-native");
  const { major, minor, patch, prerelease } =
    ReactNativeVersion ??
    require("react-native/Libraries/Core/ReactNativeVersion").version;
  return {
    major,
    minor,
    patch,
    prerelease,
    getVersionString: () => {
      const v = `${major}.${minor}.${patch}`;
      return prerelease ? `${v}-${prerelease.replace("-", "\n")}` : v;
    },
  };
})();

export function getHermesVersion(): string | undefined {
  const version =
    "HermesInternal" in global &&
    HermesInternal &&
    "getRuntimeProperties" in HermesInternal &&
    typeof HermesInternal.getRuntimeProperties === "function" &&
    HermesInternal.getRuntimeProperties()["OSS Release Version"];
  if (!version) {
    return undefined;
  }

  const [core, prerelease, ...build] = version.split("-");
  const parts = [core];
  if (prerelease) {
    parts.push("-", prerelease);
    if (build.length > 0) {
      parts.push("\n", build.join("-"));
    }
  }
  return `Hermes ${parts.join("")}`;
}

export function isBridgeless() {
  return "RN$Bridgeless" in global && global.RN$Bridgeless === true;
}

export function isFabricInstance<T>(
  ref: NativeSyntheticEvent<T>["currentTarget"]
): boolean {
  return Boolean(
    // @ts-expect-error — https://github.com/facebook/react-native/blob/0.76-stable/packages/react-native/Libraries/ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstanceUtils.js
    ref["__nativeTag"] ||
    // @ts-expect-error — https://github.com/facebook/react-native/blob/0.76-stable/packages/react-native/Libraries/ReactNative/ReactFabricPublicInstance/ReactFabricPublicInstanceUtils.js
    ref["_internalInstanceHandle"]?.stateNode?.canonical
  );
}

export function isRemoteDebuggingAvailable(): boolean {
  return (
    !getHermesVersion() &&
    !isBridgeless() &&
    typeof NativeModules["DevSettings"]?.setIsDebuggingRemotely === "function"
  );
}

export function setRemoteDebugging(value: boolean) {
  if (isRemoteDebuggingAvailable()) {
    NativeModules["DevSettings"].setIsDebuggingRemotely(value);
  }
}