How to integrate one signal push notification in website (Laravel)?

Integrate one signal push notification

    <script src="https://cdn.onesignal.com/sdks/OneSignalSDK.js" async=""></script>

    <script>

    var OneSignal = window.OneSignal || [];

        var initConfig = {

            appId: "{{ env('OneSignalApp_ID') }}",

            notifyButton: {

                enable: true

            },

        };

        OneSignal.push(function () {

            OneSignal.init(initConfig);

            console.log(OneSignal);

        });

        OneSignal.push(function() {

/*             OneSignal.isPushNotificationsEnabled(function(isEnabled) {

                if (isEnabled)

                console.log("Push notifications are enabled!");

                else

                console.log("Push notifications are not enabled yet.");    

            }); */

            OneSignal.isPushNotificationsEnabled(function(isEnabled) {

            if (isEnabled) {

                // user has subscribed

                OneSignal.getUserId( function(userId) {

                    console.log('player_id of the subscribed user is : ' + userId);

                    if($("#one_signal_player_id").length > 0){

                        $("#one_signal_player_id").val(userId);

                    }

                    // Make a POST call to your server with the user ID        

                });

            }

            });

        });

        </script>