hidden-uses-tabindex.js

import {
    hiddenFromAT,
    devices,
    isInteractive
} from '../util';


export default [{
    msg: 'You have `aria-hidden="true"` applied to an interactive element but have not '
      + 'removed it from the tab flow. This could result in a hidden tab stop for '
      + 'users of screen readers.',
    url: 'http://john.foliot.ca/aria-hidden',
    affects: [
        devices.keyboardOnly,
        devices.screenReaders
    ],
    test(tagName, props) {
        const hidden = hiddenFromAT(props);
        const interactive = isInteractive(tagName, props);
        const tabIndex = props.tabIndex === -1;

        return !hidden || !interactive || tabIndex;
    }
}];


export const pass = [{
    when: 'an interactive element is aria-hidden and has tabindex="-1"',
    render: React => <input aria-hidden tabIndex={-1} />
}, {
    when: 'the element is not interactive',
    render: React => <div aria-hidden />
}, {
    when: 'an interactive element is not aria-hidden',
    render: React => <input />
}];

export const fail = [{
    when: 'an interactive element is hidden but has no tabindex',
    render: React => <input aria-hidden />
}, {
    when: 'an interactive element is hidden but has a bad tabindex',
    // eslint-disable-next-line jsx-a11y/tabindex-no-positive
    render: React => <input aria-hidden tabIndex={2} />
}];

export const description = `
Enforce that interactive elements that have been removed from
the accessibility tree using \`aria-hidden\` are also removed from
the tab flow by setting \`tabIndex={-1}\`.  If not, this could result
in a hidden tab stop for screen reader users.
`;