CODE EXAMPLE FOR JAVASCRIPT

how to give data from react native to webview

// Web App
<button onClick={() => {
  if(window.ReactNativeWebView) { // ensure window.ReactNativeWebView is there, otherwise, web app might crash if is not there
    window.ReactNativeWebView.postMessage('Wayne is coming again')
  }
}}>
</button>

// Native App
<WebView
  onMessage={(event) => {
    console.log(event.nativeEvent.data) // Client received data
  }}
  source={{ uri: 'https://your.domain.com' }}
/>