android webview not calling only peerjs functions

I am trying to use peerjs in android vie webview, but the problem is it not working, when I debugged and tried different approaches I got to know that normal js functions work with no problem, the problem only when I call a function which includes peerjs

permissions i took in manifest file

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

MAINACTIVITY

here are two buttons 1 calls to simple js function named callJs and other one calls peerjs function named testweb

public class MainActivity extends AppCompatActivity {

@SuppressLint("JavascriptInterface")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    WebView webView = findViewById(R.id.webview);
    webView.getSettings().setJavaScriptEnabled(true);
    // Setting Allowed JS Bullet Window
    webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);

    webView.setWebChromeClient(new WebChromeClient(){
        @Override
        public void onPermissionRequest(PermissionRequest request) {
            request.grant(request.getResources());
        }
    });

    webView.addJavascriptInterface(new JavaScriptInterface(this),"AndroidFunction");

    webView.loadUrl("file:///android_asset/webViewTest.html");

    Button webTest1 = findViewById(R.id.webTest1);
    
    //calls normal js function
    webTest1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            webView.post(new Runnable() {
                @Override
                public void run() {
                    webView.evaluateJavascript("javascript:callJS()", new ValueCallback<String>() {
                        @Override
                        public void onReceiveValue(String value) {

                        }
                    });
                }
            });
        }
    });

    Button webTest2 = findViewById(R.id.webTest2);
    //calls js function with peerjs
    webTest2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            webView.post(new Runnable() {
                @Override
                public void run() {
                    webView.evaluateJavascript("javascript:testWeb()", new ValueCallback<String>() {
                        @Override
                        public void onReceiveValue(String value) {

                        }
                    });
                }
            });
        }
    });


}

JAVASCRIPTINTERFACE

public class JavaScriptInterface {
MainActivity mainActivity;
public JavaScriptInterface(MainActivity mainActivity) {
    this.mainActivity = mainActivity;
}

@JavascriptInterface
public void showToast(String toast){
    Toast.makeText(mainActivity, toast, Toast.LENGTH_LONG).show();
}

js functions

<script src="./peerjs.js"></script>

<script type="text/javascript">
  function callJS() {
    AndroidFunction.showToast("Toast From javascript");
    alert("Android Called JS Of callJS Method");
  }

  function testWeb() {
    alert("testWeb Method called");
    var peer = new Peer(1234, {
      host: "192.168.****",
      port: 8000,
      path: "/strange",
    });

    peer.on("open", () => {
      AndroidFunction.showToast("Toast From testWebPeer");
    });
  }
</script>