The App Badging API allows installed web apps to set an application-wide badge,shown in an operating-system-specific place associated with the application(such as the shelf or home screen).
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Badging for app iconsWhat is the App Badging API? #
User-Selectable App Icons. For some apps, customization is a feature that evokes a personal connection and enhances the user experience. If it provides value in your app, you can let people select an alternate app icon from a set of predefined icons that are embedded within your app. The developer behind Icon Masks, which changes the shape of app icons, has created another free tweak call Badge Masks, which allows you to change those circles into a myriad of other cool shapes. Jump into Cydia and search for and install Badge Masks by ideaprison. One such thing is the badge on the Dock Icon. In Mac, the Dock icon can have a badge - like the number of unread mails in your inbox. How much effort does it takes to add a badge to our RCP mail. If the Mail app on your iPhone or iPad is displaying phantom unread messages badge, you might have a sorting problem. Here’s how to fix it.
Badging makes it easy to subtly notify the user that there is new activitythat might require their attention, or to indicate a small amount ofinformation, such as an unread count.
Badges tend to be more user-friendly than notifications, and can be updatedwith a much higher frequency, since they don't interrupt the user. And,because they don't interrupt the user, they don't need the user's permission. How to remove diificult apps from mac.
Possible use cases #
Examples of sites that may use this API include:
Current status #![]()
The App Badging API works on Windows, and macOS, in Chrome 81 or later.It has also been confirmed to work on Edge 84 or later.Support for Chrome OS is in development and will be available in a futurerelease of Chrome. On Android, the Badging API is not supported. Instead,Android automatically shows a badge on app icon for the installed web appwhen there is an unread notification, just as for Android apps.
Try it #![]()
How to use the App Badging API #
To use the App Badging API, your web app needs to meetChrome's installability criteria,and users must add it to their home screens.
The Badge API consists of two methods on
navigator :
Both return empty promises you can use for error handling.
The badge can either be set from the current page, or from the registeredservice worker. To set or clear the badge (in either the foreground page orthe service worker), call:
In some cases, the OS may not allow the exact representation of the badge.In such cases, the browser will attempt to provide the best representation forthat device. For example, because the Badging API isn't supported on Android,Android only ever shows a dot instead of a numeric value.
Don't assume anything about how the user agent displays the badge.Some user agents may take a number like '4000' and rewrite it as'99+'. If you saturate the badge yourself (for example by setting it to '99')then the '+' won't appear. No matter the actual number, just call
setAppBadge(unreadCount) and let the user agent deal withdisplaying it accordingly.
While the App Badging API in Chrome requires an installed app, you shouldn'tmake calls to the Badging API dependent on the install state. Just call theAPI when it exists, as other browsers may show the badge in other places.If it works, it works. If not, it simply doesn't.
Setting and clearing the badge in the background from a service worker #
You can also set the app badge in the background using the service worker,allowing them to be updated even when the app isn't open. Do this eitherthrough the Push API, periodic background sync, or a combination of both.
Periodic background sync #
Periodic background sync allows a service workerto periodically poll the server, which could be used to get an updated status,and call
navigator.setAppBadge() .
However, the frequency at which the sync is called isn't perfectly reliable,and is called the at discretion of the browser.
Web Push API #
The Push API allows servers to send messages to service workers,which can run JavaScript code even when no foreground page is running. Thus,a server push could update the badge by calling
navigator.setAppBadge() .
Badge App Icon Android
However, most browsers, Chrome included, require a notification to bedisplayed whenever a push message is received. This is fine for some usecases (for example showing a notification when updatingthe badge) but makes it impossible to subtly update the badge withoutdisplaying a notification.
In addition, users must grant your site notification permission in order toreceive push messages.
A combination of both #
While not perfect, using Push API and periodic background sync togetherprovide a good solution. High priority information is delivered via the PushAPI, showing a notification and updating the badge. And lower priorityinformation is delivered by updating the badge, either when the page is open,or via periodic background sync.
The future #
The Chrome team is investigating ways to more reliably update the app badge inthe background,and wants to hear from you. Let them know what works best for youruse case by commenting on theNotification Background Updatesissue.
Feedback #
Force mac to open app. The Chrome team wants to hear about your experiences with the App Badging API.
Tell us about the API design #
Is there something in the API that doesn't work as you expected? Or arethere missing methods or properties that you need to implement your idea?Do you have a question or comment on the security model?
Report a problem with the implementation #
Did you find a bug with Chrome's implementation? Or is the implementationdifferent from the spec?
What Is A Badge App Icon On MacShow support for the API #
Planning to use the App Badging API on your site? Your public support helps theChrome team to prioritize features, and shows other browser vendors how criticalit is to support them.
Helpful links #
What Is A Badge App Icon Mac Download
Hero photo byPrateek Katyal onUnsplash
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