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[WIP] feat: refactor accordion to details and summary #220

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[WIP] feat: refactor accordion to details and summary #220

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1caeb88
feat: refactor accordion to details and summary
millnut Feb 7, 2025
c1ffa2d
feat: refactor accordion to details and summary
millnut Feb 7, 2025
2339cd1
feat: refactor accordion to details and summary
millnut Feb 7, 2025
3bbb102
feat: refactor accordion to details and summary
millnut Feb 7, 2025
5860b5f
feat: refactor accordion to details and summary
millnut Feb 7, 2025
da9d491
feat: refactor accordion to details and summary
millnut Feb 7, 2025
218b857
feat: refactor accordion to details and summary
millnut Feb 8, 2025
e6b555f
feat: refactor accordion to details and summary
millnut Feb 8, 2025
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34 changes: 11 additions & 23 deletions modules/localgov_subsites_paragraphs/css/localgov-accordion.css
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Original file line number Diff line number Diff line change
Expand Up @@ -3,29 +3,17 @@
* Basic styling for Accordion paragraph.
*/

.accordion-pane__title button {
width: 100%;
text-align: left;
}

.accordion-pane__title button[hidden] {
display: none;
}

.accordion--initialised .accordion-pane__content {
display: none;
}

.accordion--initialised .accordion-pane__content--open {
display: block;
}

/* initial hide of icon within the button, retain pointer events setting if used */
.accordion-icon {
display: none;
pointer-events: none;
}

.accordion-toggle-all {
margin-bottom: var(--vertical-rhythm-spacing);
}

/* Styling tweaks for layout builder only */
.js-lpb-component .accordion-pane__title h2,
.js-lpb-component .accordion-pane__title h3,
.js-lpb-component .accordion-pane__title h4,
.js-lpb-component .accordion-pane__title h5,
.js-lpb-component .accordion-pane__title h6 {
display: inline;
margin-block-end: 0;
font-size: 1rem;
}
233 changes: 24 additions & 209 deletions modules/localgov_subsites_paragraphs/js/localgov-accordion.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
* Localgov Accordion behaviour.
*/

(Drupal => {
((Drupal) => {
Drupal.behaviors.localgovAccordion = {
/**
* Attach accordion behaviour.
Expand All @@ -27,230 +27,45 @@
* @param {number} index
* Accordion element index.
*/
init: function init(accordion, index) {
/**
* Expands one accordion pane, setting aria-expanded on button.
*
* @param {HTMLElement} button
* The button associated with the pane to expand.
* @param {HTMLElement} pane
* The pane to expand.
*/
function expandPane(button, pane) {
button.setAttribute('aria-expanded', 'true');
pane.classList.add(openClass);
}

/**
* Collapses one accordion pane, setting aria-expanded on button.
*
* @param {HTMLElement} button
* The button associated with the pane to collapse.
* @param {HTMLElement} pane
* The pane to collapse.
*/
function collapsePane(button, pane) {
button.setAttribute('aria-expanded', 'false');
pane.classList.remove(openClass);
}
init: function init(accordion) {
const accordionPanes = accordion.querySelectorAll('.accordion-pane');
const numberOfPanes = accordionPanes.length;
const displayShowHide = accordion.hasAttribute(
'data-accordion-display-show-hide',
);
let showHideButton;
let showHideButtonLabel;

/**
* Toggles all accordion panes open or closed.
*
* Used both as an event listener callback, and called directly.
*/
function toggleAll() {
const labelEl = showHideButton.querySelector('.accordion-text');
const nextState = showHideButton.getAttribute('aria-expanded') !== 'true';
const nextState =
showHideButton.getAttribute('aria-expanded') !== 'true';

showHideButtonLabel.textContent = showHideButton.dataset[nextState ? 'hideAll' : 'showAll'];
showHideButtonLabel.textContent =
showHideButton.dataset[nextState ? 'hideAll' : 'showAll'];
showHideButton.setAttribute('aria-expanded', nextState);

for (let i = 0; i < numberOfPanes; i++) {
const currentButton = accordionPanes[i].querySelector('[aria-controls]');
const currentPane = accordionPanes[i].querySelector('.accordion-pane__content');
const tabopen = nextState
? 'details:not([open]) summary'
: 'details[open] summary';

if (nextState) {
expandPane(currentButton, currentPane);

} else {
collapsePane(currentButton, currentPane);
}
}
}

/**
* Gets the state of the accordion: all expanded, all collapsed, or mixed.
*
* @return {number}
* Returns a numeric value according to state:
*
* - all expanded: 1
* - all collapsed: 0
* - mixed: -1
*/
function getAccordionState() {
const expandedPanes = accordion.querySelectorAll(`.${openClass}`).length;
return expandedPanes
? (expandedPanes === numberOfPanes ? 1 : -1)
: 0;
}

const accordionPanes = accordion.querySelectorAll('.accordion-pane');
const numberOfPanes = accordionPanes.length;
const initClass = 'accordion--initialised';
const openClass = 'accordion-pane__content--open';
const breakpoint = accordion.dataset.accordionTabsSwitch || null;
const mq = window.matchMedia(`(max-width: '${breakpoint}')`);
const displayShowHide = accordion.hasAttribute('data-accordion-display-show-hide');
const allowMultiple = displayShowHide || accordion.hasAttribute('data-accordion-allow-multiple');
let showHideButton;
let showHideButtonLabel;

const create = function create() {
// Only initialise accordion if it hasn't already been done.
if (accordion.classList.contains(initClass)) {
return;
}

for (let i = 0; i < numberOfPanes; i++) {
const pane = accordionPanes[i];
const content = pane.querySelectorAll('.accordion-pane__content');
const title = pane.querySelectorAll('.accordion-pane__title');
const button = title[0].querySelector('button');
const heading = title[0].querySelector('.accordion-pane__heading');
const id = `accordion-content-${index}-${i}`;

// Add id attribute to all pane content elements.
content[0].setAttribute('id', id);

// Hide default Heading text
if (heading) {
heading.hidden = true;
};

if (button) {
// Add aria-controls id to button and un-hide
button.setAttribute('aria-controls', id);
button.hidden = false;

// Add click event listener to the show/hide button.
button.addEventListener('click', e => {
const targetPaneId = e.target.getAttribute('aria-controls');
const targetPane = accordion.querySelectorAll(`#${targetPaneId}`);
const openPane = accordion.querySelectorAll(`.${openClass}`);

// Check the current state of the button and the content it controls.
if (e.target.getAttribute('aria-expanded') === 'false') {
// Close currently open pane.
if (openPane.length && !allowMultiple) {
const openPaneId = openPane[0].getAttribute('id');
const openPaneButton = accordion.querySelectorAll(
`[aria-controls="${openPaneId}"]`,
);

collapsePane(openPaneButton[0], openPane[0]);
}

// Show new pane.
expandPane(e.target, targetPane[0]);
} else {
// If target pane is currently open, close it.
collapsePane(e.target, targetPane[0]);
}

if (showHideButton) {
const accordionState = getAccordionState();
const toggleState = showHideButton.getAttribute('aria-expanded') === 'true';

if (
(accordionState === 1 && !toggleState) ||
(!accordionState && toggleState)
) {
toggleAll();
}
}
});
};

if (button) {
if (displayShowHide) {
showHideButton = accordion.querySelector('.accordion-toggle-all');
showHideButton.hidden = false;
showHideButton.addEventListener('click', toggleAll);
showHideButtonLabel = showHideButton.querySelector('.accordion-text');
}

// Add init class.
accordion.classList.add(initClass);
};

}
};

const destroy = () => {
for (let i = 0; i < numberOfPanes; i++) {
// Remove id attributes from buttons in accordion pane titles.
const button = accordion
.querySelectorAll('.accordion-pane__title')[i]
.querySelector('button')
.removeAttribute('id');

// Hide buttons in accordion pane titles.
if (button) {
button.hidden = true;
}

// Un-hide default heading text
const heading = accordion
.querySelectorAll('.accordion-pane__title')[i]
.querySelector('.accordion-pane__heading');

if (heading) {
heading.hidden = false;
}

// Remove id attributes from pane content elements.
accordionPanes[i]
.querySelectorAll('.accordion-pane__content')[0]
.removeAttribute('id');

// Remove open class from accordion pane's content elements.
if (
accordionPanes[i]
.querySelectorAll('.accordion-pane__content')[0]
.classList.contains(openClass)
) {
accordionPanes[i]
.querySelectorAll('.accordion-pane__content')[0]
.classList.remove(openClass);
}
const accordionSummary = accordionPanes[i].querySelector(tabopen);
accordionSummary?.click();
}
}

for (let i = 0; i < numberOfPanes; i++) {
if (displayShowHide) {
showHideButton.hidden = true;
showHideButton.removeEventListener('click', toggleAll);
}

// Remove accordion init class.
accordion.classList.remove(initClass);
};

const breakpointCheck = function breakpointCheck() {
if (mq.matches || breakpoint === null) {
create();
} else {
destroy();
showHideButton = accordion.querySelector('.accordion-toggle-all');
showHideButton.hidden = false;
showHideButton.addEventListener('click', toggleAll);
showHideButtonLabel = showHideButton.querySelector('.accordion-text');
}
};

// Trigger create/destroy functions at different screen widths
// based on the value of data-accordion-tabs-switch attribute.
if (window.matchMedia) {
mq.addEventListener("change", () => {
breakpointCheck();
});
breakpointCheck();
}
},
};
Expand Down
26 changes: 14 additions & 12 deletions modules/localgov_subsites_paragraphs/templates/paragraph--localgov-accordion-pane.html.twig
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Original file line number Diff line number Diff line change
Expand Up @@ -48,21 +48,23 @@
'accordion-pane'
]
%}

{% set accordion = paragraph.getParentEntity() %}
{% set group_accordion = accordion.localgov_allow_multiple_open.value == 1 and accordion.localgov_display_show_hide_all.value != 1 %}

{% block paragraph %}
<div{{ attributes.addClass(classes) }}>
{% block content %}
<div class="accordion-pane__title">
<{{ heading_level }}>
<span class="accordion-pane__heading">{{ heading_text }}</span>
<button aria-expanded="false" hidden>
{{ heading_text }}
<span class='accordion-icon' aria-hidden='true'></span>
</button>
</{{ heading_level }}>
</div>
<div class="accordion-pane__content">
{{ content.localgov_body_text }}
</div>
<details {% if group_accordion %}name="accordion_{{ accordion.id() }}"{% endif %}>
<summary class="accordion-pane__title">
<{{ heading_level }}>
<span class="accordion-pane__heading">{{ heading_text }}</span>
</{{ heading_level }}>
</summary>
<div class="accordion-pane__content">
{{ content.localgov_body_text }}
</div>
</details>
{% endblock %}
</div>
{% endblock paragraph %}
2 changes: 1 addition & 1 deletion modules/localgov_subsites_paragraphs/templates/paragraph--localgov-accordion.html.twig
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Expand Up @@ -64,7 +64,7 @@
{% if paragraph.localgov_display_show_hide_all.value == 1 %}
{% set show_all = 'Show all sections'|t %}
{% set hide_all = 'Hide all sections'|t %}
<button type="button" class="accordion-toggle-all" aria-expanded="false" data-show-all="{{ show_all }}" data-hide-all="{{ hide_all }}" hidden>
<button type="button" class="accordion-toggle-all" aria-expanded="false" data-show-all="{{ show_all }}" data-hide-all="{{ hide_all }}">
<span class="accordion-icon" aria-hidden="true"></span>
<span class="accordion-text">
{{ show_all }}
Expand Down
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