BookStack/resources/js/components/tabs.js

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import {Component} from "./component";
/**
* Tabs
* Uses accessible attributes to drive its functionality.
* On tab wrapping element:
* - role=tablist
* On tabs (Should be a button):
* - id
* - role=tab
* - aria-selected=true/false
* - aria-controls=<id-of-panel-section>
* On panels:
* - id
* - tabindex=0
* - role=tabpanel
* - aria-labelledby=<id-of-tab-for-panel>
* - hidden (If not shown by default).
*/
export class Tabs extends Component {
setup() {
this.container = this.$el;
this.tabs = Array.from(this.container.querySelectorAll('[role="tab"]'));
this.panels = Array.from(this.container.querySelectorAll('[role="tabpanel"]'));
this.container.addEventListener('click', event => {
const button = event.target.closest('[role="tab"]');
if (button) {
this.show(button.getAttribute('aria-controls'));
}
});
}
show(sectionId) {
for (const panel of this.panels) {
panel.toggleAttribute('hidden', panel.id !== sectionId);
}
for (const tab of this.tabs) {
const tabSection = tab.getAttribute('aria-controls');
const selected = tabSection === sectionId;
tab.setAttribute('aria-selected', selected ? 'true' : 'false');
}
this.$emit('change', {showing: sectionId});
}
}