/Javascript/React/This.webview.postmessage is not a function reactnative

This.webview.postmessage is not a function reactnative

React native webview postmessage example

if(navigator.appVersion.includes('Android')){
            document.addEventListener("message", function (data) {
               alert("you are in android OS");
            });
        }
else {
            window.addEventListener("message", function (data) {
               alert("you are in android OS");               
             });
        }

Source: stackoverflow.com

This.webview.postmessage is not a function reactnative

if(navigator.appVersion.inclides('Android'))

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