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initializeDetailsAccordion
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export type AccordionOptions = { | |
duration?: number | |
easing?: string | |
printAll?: boolean | |
} | |
const defaultOptions: AccordionOptions = { | |
duration: 300, | |
easing: 'ease-in-out', | |
printAll: false, | |
} | |
const initializeDetailsAccordion = (details: HTMLDetailsElement, options: AccordionOptions = {}): void => { | |
if (!details) { | |
console.error('initializeDetailsAccordion: Details element is not found.') | |
return | |
} | |
const summary = details.querySelector('summary') as HTMLElement | |
const panel = details.querySelector('summary + *') as HTMLElement | |
if (!summary || !panel) { | |
console.error('initializeDetailsAccordion: Elements required for initializeDetailsAccordion are not found.') | |
return | |
} | |
const mergedOptions = { ...defaultOptions, ...options } | |
const detailsName = details.getAttribute('name') || null | |
summary.addEventListener( | |
'click', | |
(event: MouseEvent) => handleClick(event, details, panel, mergedOptions, detailsName), | |
false, | |
) | |
if (mergedOptions.printAll) { | |
window.addEventListener('beforeprint', () => handleBeforePrint(details, detailsName)) | |
window.addEventListener('afterprint', () => handleAfterPrint(details, detailsName)) | |
} | |
} | |
let isAnimating: boolean = false | |
const toggleAccordion = ( | |
details: HTMLDetailsElement, | |
panel: HTMLElement, | |
options: AccordionOptions, | |
detailsName: string | null, | |
show: boolean, | |
): void => { | |
if (details.open === show) return | |
isAnimating = true | |
if (detailsName) details.removeAttribute('name') | |
if (show) details.open = true | |
panel.style.overflow = 'clip' | |
const { blockSize } = window.getComputedStyle(panel) | |
const keyframes = show | |
? [{ maxBlockSize: '0' }, { maxBlockSize: blockSize }] | |
: [{ maxBlockSize: blockSize }, { maxBlockSize: '0' }] | |
const isPrefersReduced = window.matchMedia('(prefers-reduced-motion: reduce)').matches | |
const animationOptions: AccordionOptions = { | |
duration: isPrefersReduced ? 0 : Math.max(0, options.duration || 0), | |
easing: options.easing, | |
} | |
const onAnimationEnd = () => { | |
requestAnimationFrame(() => { | |
panel.style.overflow = '' | |
if (!show) details.open = false | |
if (detailsName) details.setAttribute('name', detailsName) | |
isAnimating = false | |
}) | |
} | |
requestAnimationFrame(() => { | |
const animation = panel.animate(keyframes, animationOptions) | |
animation.addEventListener('finish', onAnimationEnd) | |
}) | |
} | |
const hideOtherAccordions = ( | |
details: HTMLDetailsElement, | |
options: AccordionOptions, | |
detailsName: string | null, | |
): void => { | |
if (!detailsName) return | |
const otherDetails = document.querySelector(`details[name="${detailsName}"][open]`) as HTMLDetailsElement | |
if (!otherDetails || otherDetails === details) return | |
const otherPanel = otherDetails.querySelector('summary + *') as HTMLElement | |
if (!otherPanel) return | |
toggleAccordion(otherDetails, otherPanel, options, detailsName, false) | |
} | |
const handleClick = ( | |
event: MouseEvent, | |
details: HTMLDetailsElement, | |
panel: HTMLElement, | |
options: AccordionOptions, | |
detailsName: string | null, | |
): void => { | |
event.preventDefault() | |
if (isAnimating) return | |
toggleAccordion(details, panel, options, detailsName, !details.open) | |
if (details.open) hideOtherAccordions(details, options, detailsName) | |
} | |
const openStatusAttribute = 'data-open-status' | |
const handleBeforePrint = (details: HTMLDetailsElement, detailsName: string | null): void => { | |
if (!details) return | |
details.setAttribute(openStatusAttribute, String(details.open)) | |
if (detailsName) details.removeAttribute('name') | |
details.open = true | |
} | |
const handleAfterPrint = (details: HTMLDetailsElement, detailsName: string | null): void => { | |
if (!details) return | |
if (detailsName) details.setAttribute('name', detailsName) | |
details.open = details.getAttribute(openStatusAttribute) === 'true' | |
details.removeAttribute(openStatusAttribute) | |
} | |
export default initializeDetailsAccordion | |
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