Here's .d.ts for react-native-webview messsaging protocol on your web project

[softmarshmallow]

Hey if anyone needs it. I've published a very simple d.ts package for type filling window.ReactNativeWebView.x as part of my dynamix project

on npm: https://npmjs.com/react-native-webview-window-declaration
github: https://github.com/gridaco/dynamix/tree/main/lib/react-native-webview-window-declaration

add it to your package, import it where ever you need to postMessage to your webview app

import "react-native-webview-window-declaration"

You're good to go with typesafe dev env.

Or..
Just copy paste below

react-native-webview.d.ts

// Extend the Window interface to include ReactNativeWebView
declare global {
  interface Window {
    ReactNativeWebView: {
      postMessage(msg: string): void;
    };
  }
}

export {};