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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title>Element Reflection for aria-activedescendant and aria-errormessage</title>
<link rel=help href="https://whatpr.org/html/3917/common-dom-interfaces.html#reflecting-content-attributes-in-idl-attributes:element">
<link rel="author" title="Meredith Lane" href="meredithl@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<div id="activedescendant" aria-activedescendant="x"></div>
<div id="parentListbox" role="listbox" aria-activedescendant="i1">
<div role="option" id="i1">Item 1</div>
<div role="option" id="i2">Item 2</div>
</div>
<script>
test(function(t) {
assert_equals(activedescendant.ariaActiveDescendantElement, null,
"invalid ID for relationship returns null");
// Element reference should be set if the content attribute was included.
assert_equals(parentListbox.getAttribute("aria-activedescendant"), "i1", "check content attribute after parsing.");
assert_equals(parentListbox.ariaActiveDescendantElement, i1, "check idl attribute after parsing.");
assert_equals(parentListbox.ariaActiveDescendantElement, parentListbox.ariaActiveDescendantElement, "check idl attribute caching after parsing.");
// If we set the content attribute, the element reference should reflect this.
parentListbox.setAttribute("aria-activedescendant", "i2");
assert_equals(parentListbox.ariaActiveDescendantElement, i2, "setting the content attribute updates the element reference.");
assert_equals(parentListbox.ariaActiveDescendantElement, parentListbox.ariaActiveDescendantElement, "check idl attribute caching after update.");
// Setting the element reference should set the empty string in the content attribute.
parentListbox.ariaActiveDescendantElement = i1;
assert_equals(parentListbox.ariaActiveDescendantElement, i1, "getter should return the right element reference.");
assert_equals(parentListbox.getAttribute("aria-activedescendant"), "", "content attribute should be empty.");
// Both content and IDL attribute should be nullable.
parentListbox.ariaActiveDescendantElement = null;
assert_equals(parentListbox.ariaActiveDescendantElement, null);
assert_false(parentListbox.hasAttribute("aria-activedescendant"));
assert_equals(parentListbox.getAttribute("aria-activedescendant"), null, "nullifying the idl attribute removes the content attribute.");
// Setting content attribute to non-existent or non compatible element should nullify the IDL attribute.
// Reset the element to an existant one.
parentListbox.setAttribute("aria-activedescendant", "i1");
assert_equals(parentListbox.ariaActiveDescendantElement, i1, "reset attribute.");
parentListbox.setAttribute("aria-activedescendant", "non-existent-element");
assert_equals(parentListbox.getAttribute("aria-activedescendant"), "non-existent-element");
assert_equals(parentListbox.ariaActiveDescendantElement, null,"non-DOM content attribute should null the element reference");
}, "aria-activedescendant element reflection");
</script>
<div id="parentListbox2" role="listbox" aria-activedescendant="option1">
<div role="option" id="option1">Item 1</div>
<div role="option" id="option2">Item 2</div>
</div>
<script>
test(function(t) {
const option1 = document.getElementById("option1");
const option2 = document.getElementById("option2");
assert_equals(parentListbox2.ariaActiveDescendantElement, option1);
option1.removeAttribute("id");
option2.setAttribute("id", "option1");
const option2Duplicate = document.getElementById("option1");
assert_equals(option2, option2Duplicate);
assert_equals(parentListbox2.ariaActiveDescendantElement, option2);
}, "If the content attribute is set directly, the IDL attribute getter always returns the first element whose ID matches the content attribute.");
</script>
<div id="blankIdParent" role="listbox">
<div role="option" id="multiple-id"></div>
<div role="option" id="multiple-id"></div>
</div>
<script>
test(function(t) {
// Get second child of parent. This violates the setting of a reflected element
// as it will not be the first child of the parent with that ID, which should
// result in an empty string for the content attribute.
blankIdParent.ariaActiveDescendantElement = blankIdParent.children[1];
assert_true(blankIdParent.hasAttribute("aria-activedescendant"));
assert_equals(blankIdParent.getAttribute("aria-activedescendant"), "");
assert_equals(blankIdParent.ariaActiveDescendantElement, blankIdParent.children[1]);
}, "Setting the IDL attribute to an element which is not the first element in DOM order with its ID causes the content attribute to be an empty string");
</script>
<div id="outerContainer">
<p id="lightParagraph">Hello world!</p>
<span id="shadowHost">
</span>
</div>
<script>
test(function(t) {
const shadow = shadowHost.attachShadow({mode: "open"});
const link = document.createElement("a");
shadow.appendChild(link);
assert_equals(lightParagraph.ariaActiveDescendantElement, null);
// The given element crosses a shadow dom boundary, so it cannot be
// set as an element reference.
lightParagraph.ariaActiveDescendantElement = link;
assert_equals(lightParagraph.ariaActiveDescendantElement, null);
// The given element crosses a shadow dom boundary (upwards), so
// can be used as an element reference, but the content attribute
// should reflect the empty string.
link.ariaActiveDescendantElement = lightParagraph;
assert_equals(link.ariaActiveDescendantElement, lightParagraph);
assert_equals(link.getAttribute("aria-activedescendant"), "");
}, "Setting an element reference that crosses into a shadow tree is disallowed, but setting one that is in a shadow inclusive ancestor is allowed.");
</script>
<input id="startTime" ></input>
<span id="errorMessage">Invalid Time</span>
<script>
test(function(t) {
startTime.ariaErrorMessageElements = [errorMessage];
assert_equals(startTime.getAttribute("aria-errormessage"), "");
assert_array_equals(startTime.ariaErrorMessageElements, [errorMessage]);
startTime.ariaErrorMessageElements = [];
assert_array_equals(startTime.ariaErrorMessageElements, []);
assert_equals(startTime.getAttribute("aria-errormessage"), "");
startTime.setAttribute("aria-errormessage", "errorMessage");
assert_array_equals(startTime.ariaErrorMessageElements, [errorMessage]);
}, "aria-errormessage");
test(function (t) {
assert_false('ariaErrorMessageElement' in startTime);
}, 'ariaErrorMessageElement is not defined')
</script>
<label>
Password:
<input id="passwordField" type="password" aria-details="pw">
</label>
<ul>
<li id="listItem1">First description.</li>
<li id="listItem2">Second description.</li>
</ul>
<script>
test(function(t) {
assert_array_equals(passwordField.ariaDetailsElements, []);
passwordField.ariaDetailsElements = [ listItem1 ];
assert_equals(passwordField.getAttribute("aria-details"), "");
assert_array_equals(passwordField.ariaDetailsElements, [ listItem1 ]);
passwordField.ariaDetailsElements = [ listItem2 ];
assert_equals(passwordField.getAttribute("aria-details"), "");
assert_array_equals(passwordField.ariaDetailsElements, [ listItem2 ]);
}, "aria-details");
</script>
<div id="deletionParent" role="listbox" aria-activedescendant="contentAttrElement">
<div role="option" id="contentAttrElement">Item 1</div>
<div role="option" id="idlAttrElement">Item 2</div>
</div>
<script>
test(function(t) {
const contentAttrElement = document.getElementById("contentAttrElement");
const idlAttrElement = document.getElementById("idlAttrElement");
assert_equals(deletionParent.getAttribute("aria-activedescendant"), "contentAttrElement");
assert_equals(deletionParent.ariaActiveDescendantElement, contentAttrElement);
// Deleting an element set via the content attribute.
deletionParent.removeChild(contentAttrElement);
assert_equals(deletionParent.getAttribute("aria-activedescendant"), "contentAttrElement");
// As it was not explitly set, the attr-associated-element is computed from the content attribute,
// and since descendant1 has been removed from the DOM, it is not valid.
assert_equals(deletionParent.ariaActiveDescendantElement, null);
// Deleting an element set via the IDL attribute.
deletionParent.ariaActiveDescendantElement = idlAttrElement;
assert_equals(deletionParent.getAttribute("aria-activedescendant"), "");
deletionParent.removeChild(idlAttrElement);
assert_equals(deletionParent.ariaActiveDescendantElement, null);
// The content attribute is still empty.
assert_equals(deletionParent.getAttribute("aria-activedescendant"), "");
}, "Deleting a reflected element should return null for the IDL attribute and the content attribute will be empty.");
</script>
<div id="parentNode" role="listbox" aria-activedescendant="changingIdElement">
<div role="option" id="changingIdElement">Item 1</div>
<div role="option" id="persistantIDElement">Item 2</div>
</div>
<script>
test(function(t) {
const changingIdElement = document.getElementById("changingIdElement");
assert_equals(parentNode.ariaActiveDescendantElement, changingIdElement);
// Modify the id attribute.
changingIdElement.setAttribute("id", "new-id");
// The content attribute still reflects the old id, and we expect the
// Element reference to be null as there is no DOM node with id "original"
assert_equals(parentNode.getAttribute("aria-activedescendant"), "changingIdElement");
assert_equals(parentNode.ariaActiveDescendantElement, null, "Element set via content attribute with a changed id will return null on getting");
parentNode.ariaActiveDescendantElement = changingIdElement;
assert_equals(parentNode.getAttribute("aria-activedescendant"), "");
assert_equals(parentNode.ariaActiveDescendantElement, changingIdElement);
// The explicitly set element takes precendance over the content attribute.
// This means that we still return the same element reference, but the
// content attribute is empty.
changingIdElement.setAttribute("id", "newer-id");
assert_equals(parentNode.ariaActiveDescendantElement, changingIdElement, "explicitly set element is still present even after the id has been changed");
assert_equals(parentNode.getAttribute("aria-activedescendant"), "", "content attribute is empty.");
}, "Changing the ID of an element doesn't lose the reference.");
</script>
<!-- TODO(chrishall): change naming scheme to inner/outer -->
<div id="lightParent" role="listbox">
<div id="lightElement" role="option">Hello world!</div>
</div>
<div id="shadowHostElement"></div>
<script>
test(function(t) {
const lightElement = document.getElementById("lightElement");
const shadowRoot = shadowHostElement.attachShadow({mode: "open"});
assert_equals(lightParent.ariaActiveDescendantElement, null, 'null before');
assert_equals(lightParent.getAttribute('aria-activedescendant'), null, 'null before');
lightParent.ariaActiveDescendantElement = lightElement;
assert_equals(lightParent.ariaActiveDescendantElement, lightElement);
assert_equals(lightParent.getAttribute('aria-activedescendant'), "");
// Move the referenced element into shadow DOM.
// This will cause the computed attr-associated element to be null as the
// referenced element will no longer be in a valid scope.
// The underlying reference is kept intact, so if the referenced element is
// later restored to a valid scope the computed attr-associated element will
// then reflect
shadowRoot.appendChild(lightElement);
assert_equals(lightParent.ariaActiveDescendantElement, null, "computed attr-assoc element should be null as referenced element is in an invalid scope");
assert_equals(lightParent.getAttribute("aria-activedescendant"), "");
// Move the referenced element back into light DOM.
// Since the underlying reference was kept intact, after moving the
// referenced element back to a valid scope should be reflected in the
// computed attr-associated element.
lightParent.appendChild(lightElement);
assert_equals(lightParent.ariaActiveDescendantElement, lightElement, "computed attr-assoc element should be restored as referenced element is back in a valid scope");
assert_equals(lightParent.getAttribute("aria-activedescendant"), "");
}, "Reparenting an element into a descendant shadow scope hides the element reference.");
</script>
<div id='fruitbowl' role='listbox'>
<div id='apple' role='option'>I am an apple</div>
<div id='pear' role='option'>I am a pear</div>
<div id='banana' role='option'>I am a banana</div>
</div>
<div id='shadowFridge'></div>
<script>
test(function(t) {
const shadowRoot = shadowFridge.attachShadow({mode: "open"});
const banana = document.getElementById("banana");
fruitbowl.ariaActiveDescendantElement = apple;
assert_equals(fruitbowl.ariaActiveDescendantElement, apple);
assert_equals(fruitbowl.getAttribute("aria-activedescendant"), "");
// Move the referenced element into shadow DOM.
shadowRoot.appendChild(apple);
assert_equals(fruitbowl.ariaActiveDescendantElement, null, "computed attr-assoc element should be null as referenced element is in an invalid scope");
// The content attribute is still empty.
assert_equals(fruitbowl.getAttribute("aria-activedescendant"), "");
// let us rename our banana to an apple
banana.setAttribute("id", "apple");
const lyingBanana = document.getElementById("apple");
assert_equals(lyingBanana, banana);
// our ariaActiveDescendantElement thankfully isn't tricked.
// this is thanks to the underlying reference being kept intact, it is
// checked and found to be in an invalid scope.
assert_equals(fruitbowl.ariaActiveDescendantElement, null);
// our content attribute is empty.
assert_equals(fruitbowl.getAttribute("aria-activedescendant"), "");
// when we remove our IDL attribute, the content attribute is also thankfully cleared.
fruitbowl.ariaActiveDescendantElement = null;
assert_equals(fruitbowl.ariaActiveDescendantElement, null);
assert_equals(fruitbowl.getAttribute("aria-activedescendant"), null);
}, "Reparenting referenced element cannot cause retargeting of reference.");
</script>
<div id='toaster' role='listbox'></div>
<div id='shadowPantry'></div>
<script>
test(function(t) {
const shadowRoot = shadowPantry.attachShadow({mode: "open"});
// Our toast starts in the shadowPantry.
const toast = document.createElement("div");
toast.setAttribute("id", "toast");
shadowRoot.appendChild(toast);
// Prepare my toast for toasting
toaster.ariaActiveDescendantElement = toast;
assert_equals(toaster.ariaActiveDescendantElement, null);
assert_equals(toaster.getAttribute("aria-activedescendant"), "");
// Time to make some toast
toaster.appendChild(toast);
assert_equals(toaster.ariaActiveDescendantElement, toast);
// Current spec behaviour:
assert_equals(toaster.getAttribute("aria-activedescendant"), "");
}, "Element reference set in invalid scope remains intact throughout move to valid scope.");
</script>
<div id="billingElementContainer">
<div id="billingElement">Billing</div>
</div>
<div>
<div id="nameElement">Name</div>
<input type="text" id="input1" aria-labelledby="billingElement nameElement"/>
</div>
<div>
<div id="addressElement">Address</div>
<input type="text" id="input2"/>
</div>
<script>
test(function(t) {
const billingElement = document.getElementById("billingElement")
assert_array_equals(input1.ariaLabelledByElements, [billingElement, nameElement], "parsed content attribute sets element references.");
assert_equals(input1.ariaLabelledByElements, input1.ariaLabelledByElements, "check idl attribute caching after parsing");
assert_equals(input2.ariaLabelledByElements, null, "Testing missing content attribute after parsing.");
input2.ariaLabelledByElements = [billingElement, addressElement];
assert_array_equals(input2.ariaLabelledByElements, [billingElement, addressElement], "Testing IDL setter/getter.");
assert_equals(input1.ariaLabelledByElements, input1.ariaLabelledByElements, "check idl attribute caching after update");
assert_equals(input2.getAttribute("aria-labelledby"), "");
// Remove the billingElement from the DOM.
// As it was explicitly set the underlying association will remain intact,
// but it will be hidden until the element is moved back into a valid scope.
billingElement.remove();
assert_array_equals(input2.ariaLabelledByElements, [addressElement], "Computed ariaLabelledByElements shouldn't include billing when out of scope.");
// Insert the billingElement back into the DOM and check that it is visible
// again, as the underlying association should have been kept intact.
billingElementContainer.appendChild(billingElement);
assert_array_equals(input2.ariaLabelledByElements, [billingElement, addressElement], "Billing element back in scope.");
input2.ariaLabelledByElements = [];
assert_array_equals(input2.ariaLabelledByElements, [], "Testing IDL setter/getter for empty array.");
assert_equals(input2.getAttribute("aria-labelledby"), "");
input1.removeAttribute("aria-labelledby");
assert_equals(input1.ariaLabelledByElements, null);
input1.setAttribute("aria-labelledby", "nameElement addressElement");
assert_array_equals(input1.ariaLabelledByElements, [nameElement, addressElement],
"computed value after setting attribute directly");
input1.ariaLabelledByElements = null;
assert_false(input1.hasAttribute("aria-labelledby", "Nullifying the IDL attribute should remove the content attribute."));
}, "aria-labelledby.");
</script>
<ul role="tablist">
<li role="presentation"><a id="link1" role="tab" aria-controls="panel1">Tab 1</a></li>
<li role="presentation"><a id="link2" role="tab">Tab 2</a></li>
</ul>
<div role="tabpanel" id="panel1"></div>
<div role="tabpanel" id="panel2"></div>
<script>
test(function(t) {
assert_array_equals(link1.ariaControlsElements, [panel1]);
assert_equals(link2.ariaControlsElements, null);
link2.setAttribute("aria-controls", "panel1 panel2");
assert_array_equals(link2.ariaControlsElements, [panel1, panel2]);
link1.ariaControlsElements = [];
assert_equals(link1.getAttribute("aria-controls"), "");
link2.ariaControlsElements = [panel1, panel2];
assert_equals(link2.getAttribute("aria-controls"), "");
assert_array_equals(link2.ariaControlsElements, [panel1, panel2]);
link2.removeAttribute("aria-controls");
assert_equals(link2.ariaControlsElements, null);
link2.ariaControlsElements = [panel1, panel2];
assert_equals(link2.getAttribute("aria-controls"), "");
assert_array_equals(link2.ariaControlsElements, [panel1, panel2]);
link2.ariaControlsElements = null;
assert_false(link2.hasAttribute("aria-controls", "Nullifying the IDL attribute should remove the content attribute."));
}, "aria-controls.");
</script>
<a id="describedLink" aria-describedby="description1 description2">Fruit</a>
<div id="description1">Delicious</div>
<div id="description2">Nutritious</div>
<script>
test(function(t) {
assert_array_equals(describedLink.ariaDescribedByElements, [description1, description2]);
describedLink.ariaDescribedByElements = [description1, description2];
assert_equals(describedLink.getAttribute("aria-describedby"), "");
assert_array_equals(describedLink.ariaDescribedByElements, [description1, description2]);
describedLink.ariaDescribedByElements = [];
assert_equals(describedLink.getAttribute("aria-describedby"), "");
describedLink.setAttribute("aria-describedby", "description1");
assert_array_equals(describedLink.ariaDescribedByElements, [description1]);
describedLink.removeAttribute("aria-describedby");
assert_equals(describedLink.ariaDescribedByElements, null);
describedLink.ariaDescribedByElements = [description1, description2];
assert_equals(describedLink.getAttribute("aria-describedby"), "");
assert_array_equals(describedLink.ariaDescribedByElements, [description1, description2]);
describedLink.ariaDescribedByElements = null;
assert_false(describedLink.hasAttribute("aria-describedby", "Nullifying the IDL attribute should remove the content attribute."));
}, "aria-describedby.");
</script>
<h2 id="titleHeading" aria-flowto="article1 article2">Title</h2>
<div>Next</div>
<article id="article2">Content2</article>
<article id="article1">Content1</article>
<script>
test(function(t) {
const article1 = document.getElementById("article1");
const article2 = document.getElementById("article2");
assert_array_equals(titleHeading.ariaFlowToElements, [article1, article2]);
titleHeading.ariaFlowToElements = [article1, article2];
assert_equals(titleHeading.getAttribute("aria-flowto"), "");
assert_array_equals(titleHeading.ariaFlowToElements, [article1, article2]);
titleHeading.ariaFlowToElements = [];
assert_equals(titleHeading.getAttribute("aria-flowto"), "");
titleHeading.setAttribute("aria-flowto", "article1");
assert_array_equals(titleHeading.ariaFlowToElements, [article1]);
titleHeading.removeAttribute("aria-flowto");
assert_equals(titleHeading.ariaFlowToElements, null);
titleHeading.ariaFlowToElements = [article1, article2];
assert_equals(titleHeading.getAttribute("aria-flowto"), "");
assert_array_equals(titleHeading.ariaFlowToElements, [article1, article2]);
titleHeading.ariaFlowToElements = null;
assert_false(titleHeading.hasAttribute("aria-flowto", "Nullifying the IDL attribute should remove the content attribute."));
}, "aria-flowto.");
</script>
<ul>
<li id="listItemOwner" aria-owns="child1 child2">Parent</li>
</ul>
<ul>
<li id="child1">Child 1</li>
<li id="child2">Child 2</li>
</ul>
<script>
test(function(t) {
assert_array_equals(listItemOwner.ariaOwnsElements, [child1, child2]);
listItemOwner.removeAttribute("aria-owns");
assert_equals(listItemOwner.ariaOwnsElements, null);
listItemOwner.ariaOwnsElements = [child1, child2];
assert_equals(listItemOwner.getAttribute("aria-owns"), "");
assert_array_equals(listItemOwner.ariaOwnsElements, [child1, child2]);
listItemOwner.ariaOwnsElements = [];
assert_equals(listItemOwner.getAttribute("aria-owns"), "");
listItemOwner.setAttribute("aria-owns", "child1");
assert_array_equals(listItemOwner.ariaOwnsElements, [child1]);
listItemOwner.ariaOwnsElements = [child1, child2];
assert_equals(listItemOwner.getAttribute("aria-owns"), "");
assert_array_equals(listItemOwner.ariaOwnsElements, [child1, child2]);
listItemOwner.ariaOwnsElements = null;
assert_false(listItemOwner.hasAttribute("aria-owns", "Nullifying the IDL attribute should remove the content attribute."));
}, "aria-owns.");
</script>
<div id="lightDomContainer">
<h2 id="lightDomHeading" aria-flowto="shadowChild1 shadowChild2">Light DOM Heading</h2>
<div id="host"></div>
<p id="lightDomText1">Light DOM text</p>
<p id="lightDomText2">Light DOM text</p>
</div>
<script>
test(function(t) {
const shadowRoot = host.attachShadow({mode: "open"});
const shadowChild1 = document.createElement("article");
shadowChild1.setAttribute("id", "shadowChild1");
shadowRoot.appendChild(shadowChild1);
const shadowChild2 = document.createElement("article");
shadowChild2.setAttribute("id", "shadowChild1");
shadowRoot.appendChild(shadowChild2);
// The elements in the content attribute are in a "darker" tree - they
// enter a shadow encapsulation boundary, so not be associated any more.
assert_array_equals(lightDomHeading.ariaFlowToElements, []);
// These elements are in a shadow including ancestor, i.e "lighter" tree.
// Valid for the IDL attribute, but content attribute should be null.
shadowChild1.ariaFlowToElements = [lightDomText1, lightDomText2];
assert_equals(shadowChild1.getAttribute("aria-flowto"), "", "empty content attribute for elements that cross shadow boundaries.");
// These IDs belong to a different scope, so the attr-associated-element
// cannot be computed.
shadowChild2.setAttribute("aria-flowto", "lightDomText1 lightDomText2");
assert_array_equals(shadowChild2.ariaFlowToElements, []);
// Elements that cross into shadow DOM are dropped, only reflect the valid
// elements in IDL and in the content attribute.
lightDomHeading.ariaFlowToElements = [shadowChild1, shadowChild2, lightDomText1, lightDomText2];
assert_array_equals(lightDomHeading.ariaFlowToElements, [lightDomText1, lightDomText2], "IDL should only include valid elements");
assert_equals(lightDomHeading.getAttribute("aria-flowto"), "", "empty content attribute if any given elements cross shadow boundaries");
// Using a mixture of elements in the same scope and in a shadow including
// ancestor should set the IDL attribute, but should reflect the empty
// string in the content attribute.
shadowChild1.removeAttribute("aria-flowto");
shadowChild1.ariaFlowToElements = [shadowChild1, lightDomText1];
assert_equals(shadowChild1.getAttribute("aria-flowto"), "", "Setting IDL elements with a mix of scopes should reflect an empty string in the content attribute")
}, "shadow DOM behaviour for FrozenArray element reflection.");
</script>
<div id="describedButtonContainer">
<div id="buttonDescription1">Delicious</div>
<div id="buttonDescription2">Nutritious</div>
<div id="outerShadowHost"></div>
</div>
<script>
test(function(t) {
const description1 = document.getElementById("buttonDescription1");
const description2 = document.getElementById("buttonDescription2");
const outerShadowRoot = outerShadowHost.attachShadow({mode: "open"});
const innerShadowHost = document.createElement("div");
outerShadowRoot.appendChild(innerShadowHost);
const innerShadowRoot = innerShadowHost.attachShadow({mode: "open"});
// Create an element, add some attr associated light DOM elements and append it to the outer shadow root.
const describedElement = document.createElement("button");
describedButtonContainer.appendChild(describedElement);
describedElement.ariaDescribedByElements = [description1, description2];
// All elements were in the same scope, so elements are gettable and the content attribute is empty.
assert_array_equals(describedElement.ariaDescribedByElements, [description1, description2], "same scope reference");
assert_equals(describedElement.getAttribute("aria-describedby"), "");
outerShadowRoot.appendChild(describedElement);
// Explicitly set attr-associated-elements should still be gettable because we are referencing elements in a lighter scope.
// The content attr is empty.
assert_array_equals(describedElement.ariaDescribedByElements, [description1, description2], "lighter scope reference");
assert_equals(describedElement.getAttribute("aria-describedby"), "");
// Move the explicitly set elements into a deeper shadow DOM to test the relationship should not be gettable.
innerShadowRoot.appendChild(description1);
innerShadowRoot.appendChild(description2);
// Explicitly set elements are no longer retrievable, because they are no longer in a valid scope.
assert_array_equals(describedElement.ariaDescribedByElements, [], "invalid scope reference");
assert_equals(describedElement.getAttribute("aria-describedby"), "");
// Move into the same shadow scope as the explicitly set elements to test that the elements are gettable.
innerShadowRoot.appendChild(describedElement);
assert_array_equals(describedElement.ariaDescribedByElements, [description1, description2], "restored valid scope reference");
assert_equals(describedElement.getAttribute("aria-describedby"), "");
}, "Moving explicitly set elements across shadow DOM boundaries.");
</script>
<div id="sameScopeContainer">
<div id="labeledby" aria-labeledby="headingLabel1 headingLabel2">Misspelling</div>
<div id="headingLabel1">Wonderful</div>
<div id="headingLabel2">Fantastic</div>
<div id="headingShadowHost"></div>
</div>
<script>
test(function(t) {
const shadowRoot = headingShadowHost.attachShadow({mode: "open"});
const headingElement = document.createElement("h1");
const headingLabel1 = document.getElementById("headingLabel1")
const headingLabel2 = document.getElementById("headingLabel2")
shadowRoot.appendChild(headingElement);
assert_array_equals(labeledby.ariaLabelledByElements, [headingLabel1, headingLabel2], "aria-labeled by is supported by IDL getter.");
// Explicitly set elements are in a lighter shadow DOM, so that's ok.
headingElement.ariaLabelledByElements = [headingLabel1, headingLabel2];
assert_array_equals(headingElement.ariaLabelledByElements, [headingLabel1, headingLabel2], "Lighter elements are gettable when explicitly set.");
assert_equals(headingElement.getAttribute("aria-labelledby"), "");
// Move into Light DOM, explicitly set elements should still be gettable.
// Note that the content attribute is still empty.
sameScopeContainer.appendChild(headingElement);
assert_array_equals(headingElement.ariaLabelledByElements, [headingLabel1, headingLabel2], "Elements are all in same scope, so gettable.");
assert_equals(headingElement.getAttribute("aria-labelledby"), "", "Content attribute is empty.");
// Reset the association, the content attribute is sitll empty.
headingElement.ariaLabelledByElements = [headingLabel1, headingLabel2];
assert_equals(headingElement.getAttribute("aria-labelledby"), "");
// Remove the referring element from the DOM, elements are no longer longer exposed,
// underlying internal reference is still kept intact.
headingElement.remove();
assert_array_equals(headingElement.ariaLabelledByElements, [], "Element is no longer in the document, so references should no longer be exposed.");
assert_equals(headingElement.getAttribute("aria-labelledby"), "");
// Insert it back in.
sameScopeContainer.appendChild(headingElement);
assert_array_equals(headingElement.ariaLabelledByElements, [headingLabel1, headingLabel2], "Element is restored to valid scope, so should be gettable.");
assert_equals(headingElement.getAttribute("aria-labelledby"), "");
// Remove everything from the DOM, nothing is exposed again.
headingLabel1.remove();
headingLabel2.remove();
assert_array_equals(headingElement.ariaLabelledByElements, []);
assert_equals(headingElement.getAttribute("aria-labelledby"), "");
assert_equals(document.getElementById("headingLabel1"), null);
assert_equals(document.getElementById("headingLabel2"), null);
// Reset the association.
headingElement.ariaLabelledByElements = [headingLabel1, headingLabel2];
assert_array_equals(headingElement.ariaLabelledByElements, []);
assert_equals(headingElement.getAttribute("aria-labelledby"), "");
}, "Moving explicitly set elements around within the same scope, and removing from the DOM.");
</script>
<input id="input">
<optgroup>
<option id="first">First option</option>
<option id="second">Second option</option>
</optgroup>
<script>
test(function(t) {
input.ariaActiveDescendantElement = first;
first.parentElement.appendChild(first);
assert_equals(input.ariaActiveDescendantElement, first);
}, "Reparenting.");
</script>
<div id='fromDiv'></div>
<script>
test(function(t) {
const toSpan = document.createElement('span');
toSpan.setAttribute("id", "toSpan");
fromDiv.ariaActiveDescendantElement = toSpan;
assert_equals(fromDiv.ariaActiveDescendantElement, null, "Referenced element not inserted into document, so is in an invalid scope.");
assert_equals(fromDiv.getAttribute("aria-activedescendant"), "", "Invalid scope, so content attribute not set.");
fromDiv.appendChild(toSpan);
assert_equals(fromDiv.ariaActiveDescendantElement, toSpan, "Referenced element now inserted into the document.");
assert_equals(fromDiv.getAttribute("aria-activedescendant"), "", "Content attribute remains empty, as it is only updated at set time.");
}, "Attaching element reference before it's inserted into the DOM.");
</script>
<div id='originalDocumentDiv'></div>
<script>
test(function(t) {
const newDoc = document.implementation.createHTMLDocument('new document');
const newDocSpan = newDoc.createElement('span');
newDoc.body.appendChild(newDocSpan);
// Create a reference across documents.
originalDocumentDiv.ariaActiveDescendantElement = newDocSpan;
assert_equals(originalDocumentDiv.ariaActiveDescendantElement, null, "Cross-document is an invalid scope, so reference will not be visible.");
assert_equals(fromDiv.getAttribute("aria-activedescendant"), "", "Invalid scope when set, so content attribute not set.");
// "Move" span to first document.
originalDocumentDiv.appendChild(newDocSpan);
// Implementation defined: moving object into same document from other document may cause reference to become visible.
assert_equals(originalDocumentDiv.ariaActiveDescendantElement, newDocSpan, "Implementation defined: moving object back *may* make reference visible.");
assert_equals(fromDiv.getAttribute("aria-activedescendant"), "", "Invalid scope when set, so content attribute not set.");
}, "Cross-document references and moves.");
</script>
<script>
test(function(t) {
const otherDoc = document.implementation.createHTMLDocument('otherDoc');
const otherDocDiv = otherDoc.createElement('div');
const otherDocSpan = otherDoc.createElement('span');
otherDocDiv.appendChild(otherDocSpan);
otherDoc.body.appendChild(otherDocDiv);
otherDocDiv.ariaActiveDescendantElement = otherDocSpan;
assert_equals(otherDocDiv.ariaActiveDescendantElement, otherDocSpan, "Setting reference on a different document.");
// Adopt element from other oducment.
document.body.appendChild(document.adoptNode(otherDocDiv));
assert_equals(otherDocDiv.ariaActiveDescendantElement, otherDocSpan, "Reference should be kept on the new document too.");
}, "Adopting element keeps references.");
</script>
<div id="cachingInvariantMain"></div>
<div id="cachingInvariantElement1"></div>
<div id="cachingInvariantElement2"></div>
<div id="cachingInvariantElement3"></div>
<div id="cachingInvariantElement4"></div>
<div id="cachingInvariantElement5"></div>
<script>
test(function(t) {
cachingInvariantMain.ariaControlsElements = [cachingInvariantElement1, cachingInvariantElement2];
cachingInvariantMain.ariaDescribedByElements = [cachingInvariantElement3, cachingInvariantElement4];
cachingInvariantMain.ariaDetailsElements = [cachingInvariantElement5];
cachingInvariantMain.ariaFlowToElements = [cachingInvariantElement1, cachingInvariantElement3];
cachingInvariantMain.ariaLabelledByElements = [cachingInvariantElement2, cachingInvariantElement4];
cachingInvariantMain.ariaOwnsElements = [cachingInvariantElement1, cachingInvariantElement2, cachingInvariantElement3];
let ariaControlsElementsArray = cachingInvariantMain.ariaControlsElements;
let ariaDescribedByElementsArray = cachingInvariantMain.ariaDescribedByElements;
let ariaDetailsElementsArray = cachingInvariantMain.ariaDetailsElements;
let ariaFlowToElementsArray = cachingInvariantMain.ariaFlowToElements;
let ariaLabelledByElementsArray = cachingInvariantMain.ariaLabelledByElements;
let ariaOwnsElementsArray = cachingInvariantMain.ariaOwnsElements;
assert_equals(ariaControlsElementsArray, cachingInvariantMain.ariaControlsElements, "Caching invariant for ariaControlsElements");
assert_equals(ariaDescribedByElementsArray, cachingInvariantMain.ariaDescribedByElements, "Caching invariant for ariaDescribedByElements");
assert_equals(ariaDetailsElementsArray, cachingInvariantMain.ariaDetailsElements, "Caching invariant for ariaDetailsElements");
assert_equals(ariaFlowToElementsArray, cachingInvariantMain.ariaFlowToElements, "Caching invariant for ariaFlowToElements");
assert_equals(ariaLabelledByElementsArray, cachingInvariantMain.ariaLabelledByElements, "Caching invariant for ariaLabelledByElements");
assert_equals(ariaOwnsElementsArray, cachingInvariantMain.ariaOwnsElements, "Caching invariant for ariaOwnsElements");
}, "Caching invariant different attributes.");
</script>
<div id="cachingInvariantMain1"></div>
<div id="cachingInvariantMain2"></div>
<script>
test(function(t) {
cachingInvariantMain1.ariaDescribedByElements = [cachingInvariantElement1, cachingInvariantElement2];
cachingInvariantMain2.ariaDescribedByElements = [cachingInvariantElement3, cachingInvariantElement4];
let ariaDescribedByElementsArray1 = cachingInvariantMain1.ariaDescribedByElements;
let ariaDescribedByElementsArray2 = cachingInvariantMain2.ariaDescribedByElements;
assert_equals(ariaDescribedByElementsArray1, cachingInvariantMain1.ariaDescribedByElements, "Caching invariant for ariaDescribedByElements in one elemnt");
assert_equals(ariaDescribedByElementsArray2, cachingInvariantMain2.ariaDescribedByElements, "Caching invariant for ariaDescribedByElements in onother elemnt");
}, "Caching invariant different elements.");
</script>
<!-- TODO(chrishall): add additional GC test covering:
if an element is in an invalid scope but attached to the document, it's
not GC'd;
-->
<!-- TODO(chrishall): add additional GC test covering:
if an element is not attached to the document, but is in a tree fragment
which is not GC'd because there is a script reference to another element
in the tree fragment, and the relationship is valid because it is between
two elements in that tree fragment, the relationship is exposed *and* the
element is not GC'd
-->
</html>
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