mediawiki-skins-Citizen/resources/skins.citizen.scripts.sections/skins.citizen.scripts.sections.js
2022-05-13 00:20:05 -04:00

35 lines
1.1 KiB
JavaScript

/**
* @param {Document} document
* @return {void}
*/
function initCollapsibleSections( document ) {
const prefix = 'section-',
headings = document.querySelectorAll( '.' + prefix + 'heading' ),
sections = document.querySelectorAll( '.' + prefix + 'collapsible' );
for ( let i = 0; i < headings.length; i++ ) {
const j = i + 1,
collapsibleID = prefix + 'collapsible-' + j,
headline = headings[ i ].querySelector( '.mw-headline' );
// Set up ARIA
headline.setAttribute( 'tabindex', 0 );
headline.setAttribute( 'role', 'button' );
headline.setAttribute( 'aria-controls', collapsibleID );
headline.setAttribute( 'aria-expanded', true );
// TODO: Need a keyboard handler
headings[ i ].addEventListener( 'click', function () {
// .section-heading--collapsed
this.classList.toggle( prefix + 'heading--collapsed' );
// .section-collapsible--collapsed
sections[ j ].classList.toggle( prefix + 'collapsible--collapsed' );
headline.setAttribute( 'aria-expanded', headline.getAttribute( 'aria-expanded' ) === 'true' ? 'false' : 'true' );
} );
}
}
initCollapsibleSections( document );