chrome.notifications.update() or create()

问题:

I want my chrome extension to take a notification.id, and:

1. Update an existing notification if it does exist. OR
2. Create a new notification if it doesn't exist.

Calling clear() then create() is not ideal, since the animation is visually jarring for both remove() and create() methods, where I want to update without animations. Plus, obviously, calling update() on a disappeared notification doesn't do anything.

Is there an easy way to implement this?

回答1:

Edit: This approach no longer works on any platform except ChromeOS due to the removal of Chrome's Notification Center.

Possible ideas to work around it include using requireInteraction: true flag on notifications to fully control notification lifetime.

---

There is a dirty trick for re-showing a notification. If you change a notification's priority to a higher value, it will be re-shown if it exists.

function createOrUpdate(id, options, callback) {   // Try to lower priority to minimal "shown" priority   chrome.notifications.update(id, {priority: 0}, function(existed) {     if(existed) {       var targetPriority = options.priority || 0;       options.priority = 1;       // Update with higher priority       chrome.notifications.update(id, options, function() {         chrome.notifications.update(id, {priority: targetPriority}, function() {           callback(true); // Updated         });       });     } else {       chrome.notifications.create(id, options, function() {         callback(false); // Created       });     }   }); } 

回答2:

Xan's answer no longer works on Windows, MacOS, or Linux. At this point the only way to make sure your notification displays, no matter what, is to create a new notification.

If you want to prevent multiple notifications from being on screen, you'll have to clear the old notification and replace it with a new one. This is demonstrated below.

NOTIFICATION_ID = "some_random_string"; function showNotification ( ... , callback) {     chrome.notifications.clear(NOTIFICATION_ID, function(cleared) {         var options = {             // whatever         };         chrome.notifications.create(NOTIFICATION_ID, options, callback);     }); } 

Of course, this results in an animation of existing notification getting dismissed and a new notification immediately taking its place, but unfortunately this is unavoidable.

文章来源: chrome.notifications.update() or create()