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' }}
/>

how to give data from react native to webview

// Native
this.webviewRef.postMessage('Wayne is coming!!!')

// Web
window.addEventListener("message", message => {
  console.log(message.data) // Wayne is coming!!!
});