function updateMangeWebPushSubscriptionButton(buttonSelector) { var hideWhenSubscribed = false; var subscribeText = "Subscribe to Notifications"; var unsubscribeText = "Unsubscribe from Notifications";

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getSubscriptionState().then(function(state) { var buttonText = !state.isPushEnabled || state.isOptedOut ? subscribeText : unsubscribeText;

var element = document.querySelector(buttonSelector); if (element === null) { return; }

element.removeEventListener('click', onManageWebPushSubscriptionButtonClicked); element.addEventListener('click', onManageWebPushSubscriptionButtonClicked); element.textContent = buttonText;

if (state.hideWhenSubscribed && state.isPushEnabled) { element.style.display = "none"; } else { element.style.display = ""; } }); }

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function getSubscriptionState() { return Promise.all([ OneSignal.isPushNotificationsEnabled(), OneSignal.isOptedOut() ]).then(function(result) { var isPushEnabled = result[0]; var isOptedOut = result[1];

return { isPushEnabled: isPushEnabled, isOptedOut: isOptedOut }; }); }

var OneSignal = OneSignal || []; var buttonSelector = "#my-notification-button";

/* This example assumes you've already initialized OneSignal */ OneSignal.push(function() { // If we're on an unsupported browser, do nothing if (!OneSignal.isPushNotificationsSupported()) { return; } updateMangeWebPushSubscriptionButton(buttonSelector); OneSignal.on("subscriptionChange", function(isSubscribed) { /* If the user's subscription state changes during the page's session, update the button text */ updateMangeWebPushSubscriptionButton(buttonSelector); }); });