Could someone provide an explanation of $mdLiveAnnouncer using this code snippet?
module.controller('AppCtrl', function($mdLiveAnnouncer) {
// Making a basic announcement (Polite Mode)
$mdLiveAnnouncer.announce('Hey Google');
// Creating a custom announcement (Assertive Mode)
$mdLiveAnnouncer.announce('Hey Google', 'assertive');
});
As per the information provided in their official documentation.
The $mdLiveAnnouncer service is crucial for components to ensure proper accessibility. When using $mdLiveAnnouncer.announce(message, politeness);
It helps in announcing messages to screenreaders that are supported.
If you're experiencing instances where it seems like nothing is happening, could it be because you haven't tried running it on a device with a compatible screenreader?
Based on the additional information available on GitHub (linked within the documentation mentioned earlier):
- JAWS and NVDA over IE11 may not announce anything if a non-zero timeout isn't set.
- In Chrome and IE11 with NVDA or JAWS, a repeated message will not be read again unless a non-zero delay is used after clearing the initial message. (tested with JAWS 17 as of now).
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