8.6.0 • Published 10 months ago

@lwc/aria-reflection v8.6.0

Weekly downloads
-
License
MIT
Repository
github
Last release
10 months ago

@lwc/aria-reflection

Note: use this code at your own risk. It is optimized for backwards-compatibility, not as a forward-looking polyfill that keeps up to date with web standards.

Polyfill for ARIA string reflection on Elements. This is part of the Accessibility Object Model (AOM).

For example:

element.setAttribute('aria-pressed', 'true');
console.log(element.ariaPressed); // true
element.ariaPressed = false;
console.log(element.getAttribute('aria-pressed')); // false

Note that the attribute aria-pressed is reflected to the property ariaPressed, and vice versa.

Usage

npm install @lwc/aria-reflection
import '@lwc/aria-reflection';

The polyfill is applied globally to Element.prototype as soon as the module is imported.

Implementation

The polyfill patches these standard property/attribute reflections:

PropertyAttribute
ariaAtomicaria-atomic
ariaAutoCompletearia-autocomplete
ariaBrailleLabelaria-braillelabel
ariaBrailleRoleDescriptionaria-brailleroledescription
ariaBusyaria-busy
ariaCheckedaria-checked
ariaColCountaria-colcount
ariaColIndexaria-colindex
ariaColIndexTextaria-colindextext
ariaColSpanaria-colspan
ariaCurrentaria-current
ariaDescriptionaria-description
ariaDisabledaria-disabled
ariaExpandedaria-expanded
ariaHasPopuparia-haspopup
ariaHiddenaria-hidden
ariaInvalidaria-invalid
ariaKeyShortcutsaria-keyshortcuts
ariaLabelaria-label
ariaLevelaria-level
ariaLivearia-live
ariaModalaria-modal
ariaMultiLinearia-multiline
ariaMultiSelectablearia-multiselectable
ariaOrientationaria-orientation
ariaPlaceholderaria-placeholder
ariaPosInSetaria-posinset
ariaPressedaria-pressed
ariaReadOnlyaria-readonly
ariaRelevantaria-relevant
ariaRequiredaria-required
ariaRoleDescriptionaria-roledescription
ariaRowCountaria-rowcount
ariaRowIndexaria-rowindex
ariaRowIndexTextaria-rowindextext
ariaRowSpanaria-rowspan
ariaSelectedaria-selected
ariaSetSizearia-setsize
ariaSortaria-sort
ariaValueMaxaria-valuemax
ariaValueMinaria-valuemin
ariaValueNowaria-valuenow
ariaValueTextaria-valuetext
rolerole

As well as these non-standard reflections:

PropertyAttribute
ariaActiveDescendantaria-activedescendant
ariaControlsaria-controls
ariaDescribedByaria-describedby
ariaDetailsaria-details
ariaErrorMessagearia-errormessage
ariaFlowToaria-flowto
ariaLabelledByaria-labelledby
ariaOwnsaria-owns

To determine which browsers support ARIA reflection, see the relevant Web Platform Tests for ARIA string reflection and ARIA element reflection.

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