chromium/third_party/catapult/third_party/polymer/components/iron-a11y-announcer/README.md


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49


<!---

This README is automatically generated from the comments in these files:
iron-a11y-announcer.html

Edit those files, and our readme bot will duplicate them over here!
Edit this file, and the bot will squash your changes :)

-->

[![Build Status](https://travis-ci.org/PolymerElements/iron-a11y-announcer.svg?branch=master)](https://travis-ci.org/PolymerElements/iron-a11y-announcer)

_[Demo and API Docs](https://elements.polymer-project.org/elements/iron-a11y-announcer)_


##&lt;iron-a11y-announcer&gt;


`iron-a11y-announcer` is a singleton element that is intended to add a11y
to features that require on-demand announcement from screen readers. In
order to make use of the announcer, it is best to request its availability
in the announcing element.

Example:

    Polymer({

      is: 'x-chatty',

      attached: function() {
        // This will create the singleton element if it has not
        // been created yet:
        Polymer.IronA11yAnnouncer.requestAvailability();
      }
    });

After the `iron-a11y-announcer` has been made available, elements can
make announces by firing bubbling `iron-announce` events.

Example:

    this.fire('iron-announce', {
      text: 'This is an announcement!'
    }, { bubbles: true });

Note: announcements are only audible if you have a screen reader enabled.