accessibility-developer-tools
Version:
This is a library of accessibility-related testing and utility code.
44 lines (41 loc) • 1.94 kB
JavaScript
// Copyright 2014 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
goog.require('axs.AuditRules');
goog.require('axs.browserUtils');
goog.require('axs.constants.Severity');
goog.require('axs.utils');
/**
* This test checks that aria-owns does not reference an element that is already owned implicitly.
*/
axs.AuditRules.addRule({
// TODO(RickSBrown): check for elements that try to 'aria-own' an ancestor;
// Also: own self does not make sense. Perhaps any IDREF pointing to itself is bad?
// Perhaps even extend this beyond ARIA (e.g. label for itself). Have to change return code?
// Also: other "bad hierarchy" tests - e.g. active-descendant owning a non-descendant...
name: 'ariaOwnsDescendant',
heading: 'aria-owns should not be used if ownership is implicit in the DOM',
url: 'https://github.com/GoogleChrome/accessibility-developer-tools/wiki/Audit-Rules#ax_aria_06',
severity: axs.constants.Severity.WARNING,
relevantElementMatcher: function(element) {
return axs.browserUtils.matchSelector(element, '[aria-owns]');
},
test: function(element) {
var attr = 'aria-owns';
var ownedElements = axs.utils.getIdReferents(attr, element);
return ownedElements.some(function(ownedElement) {
return (element.compareDocumentPosition(ownedElement) & Node.DOCUMENT_POSITION_CONTAINED_BY);
});
},
code: 'AX_ARIA_06'
});