How to send web push notification for all active users

here I have used the button to send web push notifications. using this button only on the same browser notification came. but I want to send the same push notification to all active users. below is my code.

let applicationServerPublicKey = ‘myKey’;

            var pushButton = document.querySelector('.js-push-btn');
            var pushNotiButton = document.querySelector('.push-btn');

            let isSubscribed = false;
            let swRegistration = null;

            function urlB64ToUint8Array(base64String) {
                const padding = '='.repeat((4 - base64String.length % 4) % 4);
                const base64 = (base64String + padding)
                    .replace(/-/g, '+')
                    .replace(/_/g, '/');

                const rawData = window.atob(base64);
                const outputArray = new Uint8Array(rawData.length);

                for (let i = 0; i < rawData.length; ++i) {
                    outputArray[i] = rawData.charCodeAt(i);
                }
                return outputArray;
            }


            function updateBtn() {
                if (isSubscribed) {
                    pushButton.textContent = 'Disable Push Messaging';
                } else {
                    pushButton.textContent = 'Enable Push Messaging';
                }

                pushButton.disabled = false;
            }

            function updateSubscriptionOnServer(subscription) {
                // TODO: Send subscription to application server
                console.log('subscription'+JSON.stringify(subscription))
                const subscriptionJson = document.querySelector('.js-subscription-json');
                const subscriptionDetails =
                    document.querySelector('.js-subscription-details');

                if (subscription) {
                    //subscriptionJson.textContent = JSON.stringify(subscription);
                    //subscriptionDetails.classList.remove('is-invisible');
                } else {
                    //subscriptionDetails.classList.add('is-invisible');
                }
            }

            function subscribeUser() {
                const applicationServerKey = urlB64ToUint8Array(applicationServerPublicKey);
                swRegistration.pushManager.subscribe({
                    userVisibleOnly: true,
                    applicationServerKey: applicationServerKey
                })
                    .then(function(subscription) {
                        console.log('User is subscribed');

                        updateSubscriptionOnServer(subscription);

                        isSubscribed = true;

                        updateBtn();
                    })
                    .catch(function(err) {
                        console.log('Failed to subscribe the user: ', err);
                        updateBtn();
                    });
            }

            function initializeUI() {
                //pushButton.addEventListener('click', function() {
                pushButton.disabled = true;
                if (isSubscribed) {
                    // TODO: Unsubscribe user
                } else {
                    subscribeUser();
                }
                //});

                // Set the initial subscription value
                swRegistration.pushManager.getSubscription()
                    .then(function(subscription) {
                        isSubscribed = !(subscription === null);

                        updateSubscriptionOnServer(subscription);

                        if (isSubscribed) {
                            console.log('User IS subscribed.');
                        } else {
                            console.log('User is NOT subscribed.');
                        }

                        updateBtn();
                    });
            }

            if ('serviceWorker' in navigator && 'PushManager' in window) {
                window.addEventListener('load', function() {
                    navigator.serviceWorker.register('{% url 'sw.js' %}').then(function(registration) {
                        // Registration was successful
                        console.log('ServiceWorker registration successful with scope: ', registration.scope);
                        swRegistration = registration;
                        initializeUI();
                    }, function(err) {
                        // registration failed :(
                        console.log('ServiceWorker registration failed: ', err);
                    });
                });
            }else {
                console.warn('Push messaging is not supported');
                pushButton.textContent = 'Push Not Supported';
            }

            $(".push-btn").click(function(event) {
                console.log('[Service Worker] Push Received.');
                //console.log('[Service Worker] Push had this data: ');
                const title = 'Push Codelab';
                const options = {
                    body: 'Yay it works.',
                    //icon: 'images/icon.png',
                    //badge: 'images/badge.png'
                };
                navigator.serviceWorker.getRegistration().then(reg => {
                    reg.showNotification(title, options);
                });
                //event.waitUntil(ServiceWorkerRegistration.registration.showNotification(title, options));
            });


            let deferredPrompt;
            let addBtn = document.querySelector('#add-home-screen-btn');
            let homeScreenBlock = document.querySelector("#home-screen-btn-block")
            homeScreenBlock.style.display = 'none';
            window.addEventListener('beforeinstallprompt',(e)=>{
                e.preventDefault();
                deferredPrompt = e;
                homeScreenBlock.style.display = 'block';

                addBtn.addEventListener('click',(e)=>{
                    homeScreenBlock.style.display='none';
                    deferredPrompt.prompt();
                    deferredPrompt.userChoice
                        .then((choiceResult)=>{
                            if(choiceResult.outcome === 'accepted'){
                                console.log('Accepted A2SH')
                            }else {
                                console.log('user declined')
                            }
                            deferredPrompt = null;
                        })
                })
            });