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AOM (Accessible Object Model) - Really quick!
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stefan judis
May 17, 2018
Technology
1
240
AOM (Accessible Object Model) - Really quick!
stefan judis
May 17, 2018
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Transcript
AOM (Accessibility Object Model) - REALLY QUICK - @stefanjudis
wicg.github.io/aom/demos/#7
wicg.github.io/aom/demos/#7
wicg.github.io/aom/demos/#7 ???
A JavaScript API to allow developers to modify and explore
the accessibility tree.
Reflecting ARIA attributes
<label> Want to do it? <input type="checkbox" checked> </label>
None
<label> Want to do it? <wired-toggle></wired-toggle> </label>
None
<label> Want to do it? <wired-toggle role="checkbox" tabindex="0" aria-label="Wanna do
it?"></wired-toggle> </label>
None
Currently, Web Components are forced to use ARIA to declare
their default semantics.
element.accessibleNode.role = 'checkbox'; element.accessibleNode.label = 'Want to try it?'; OR
element.role = "checkbox"; element.ariaLabel = "checkbox"; <wired-toggle></wired-toggle>
element.accessibleNode.role = 'checkbox'; element.accessibleNode.label = 'Want to try it?'; <wired-toggle></wired-toggle>
OR this.shadowRoot.role = "checkbox"; this.shadowRoot.label = "checkbox";
None
Accessible Custom Components are hard!
New Events from assistive technology
increase/decrease volume to interact with the slider no way to
do the same
•accessibleclick •accessiblecontextmenu •accessiblefocus •accessiblesetvalue •accessibleincrement •accessibledecrement •accessibleselect •accessiblescroll •accessibledismiss slider.addEventListener("accessibleincrement",
(event) => { console.log("Got Increment from assistive technology"); });
www.youtube.com/watch?v=0Zpzl4EKCco
Virtual Nodes
aframe.io/examples/showcase/360-image-gallery/
None
let virtualNode = new AccessibleNode(); virtualNode.role = "button"; virtualNode.label =
"Change Image"; document.body.attachAccessibleRoot(); document.body.accessibleRoot.appendChild(virtualNode);
wicg.github.io/aom/demos/tictactoe.html
wicg.github.io/aom/demos/tictactoe.html
Full Introspection of the Accessibility Tree
<div id="super" role="superbutton"></div> const element = document.getElementById('super'); getComputedAccessibleNode(element) .then(accessibleNode =>
console.log(accessibleNode)); Does this work?
const element = document.getElementById('super'); getComputedAccessibleNode(element) .then(accessibleNode => console.log(accessibleNode)); <div id="super"
role="superbutton"></div>
Great for testing and feature detects
SPEC IS IN PROGRESS
IMPLEMENTATIONS ARE IN PROGRESS
None
AOM Really cool but we have to wait...
Thanks! @stefanjudis